Major interaction on record — check this product against your medications before combining. Based on 9 of 13 ingredients. Check your meds →
Dietary supplement

Performance Energy Punch Ingredients & Drug Interactions

by ON Optimum Nutrition

Powder Category: Amino Acid/protein
Most serious interaction: Major
The interaction bottom line Most serious interaction: Major

Performance Energy Punch is a dietary supplement by ON Optimum Nutrition with 13 active ingredients. Its ingredients are commonly taken for sports and exercise support, blood sugar balance, general amino acid supplementation.Based on those ingredients, 209 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are micronized Taurine, L-Tyrosine, Micronized, L-Phenylalanine, Micronized. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Performance Energy Punch by ON Optimum Nutrition

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 13 active ingredients.
  • “Amino Blend” is a proprietary blend — the label gives one combined amount (5 Gram(s)) without saying how much of each component you get.

Performance Energy Punch contains 13 active amino acids — the building blocks your body uses for muscle, energy, and recovery. The mix includes essential amino acids (ones your body can't make on its own, like leucine, isoleucine, and valine), conditionally essential amino acids (needed during intense exercise or stress, like citrulline and taurine), and others like lysine, tyrosine, and phenylalanine that support various functions.

The inactive ingredients are flavoring, sweetener, thickeners, and flow agents typical of powder supplements.

Does it work?

Moderate evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Moderate

Some clinical evidence supports this product's ingredients for its stated purpose, but it isn't conclusive.

Why this rating?
  • The label markets this product for: energy support and muscle recovery.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle breakdown, Exercise-induced muscle soreness, Fatigue, Muscle strength, Physical performance — and 3 related terms.
  • The strongest evidence on file: Beta-alanine is rated "Possibly Effective" for Athletic performance (Natural Medicines).
  • Also on file: Beta-alanine is rated "Possibly Effective" for Physical performance.
  • Also on file: Tyrosine is rated "Possibly Ineffective" for Athletic performance.

Beta-alanine (CarnoSyn) is possibly effective for athletic performance and physical performance — meaning some evidence supports it, but it's not ironclad. L-tyrosine is possibly effective for cognitive function and memory.

L-methionine is possibly effective for neural tube birth defects (a pregnancy-related concern). Most of the other amino acids here have insufficient evidence in our data to rate their effectiveness for the conditions studied, or they showed no benefit (like L-phenylalanine for ADHD).

This product is marketed as an energy and performance aid; the evidence supports some of those claims, but not all.

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 7 of the 9 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 9 of 9.
  • General safety write-ups exist for 9 of 9.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Beta-alanine is generally well tolerated but commonly causes harmless skin tingling and flushing, usually starting on the scalp within 20 minutes and lasting about an hour — this is dose-dependent and mild at lower doses. Avoid beta-alanine in pregnancy and while breastfeeding due to insufficient safety data.

L-phenylalanine can cause anxiety, insomnia, headache, constipation, nausea, and heartburn; avoid it in pregnancy and breastfeeding. L-tyrosine may cause fatigue, headache, heartburn, and nausea; not enough safety data exists for pregnancy or breastfeeding.

L-threonine can cause headache and mild digestive upset including diarrhea; supplement doses are not well studied in pregnancy or breastfeeding. L-lysine may cause stomach upset and abdominal pain at high doses.

Taurine is generally well tolerated short-term but can cause constipation, diarrhea, or heartburn; avoid supplemental doses in pregnancy and breastfeeding unless your doctor advises otherwise.

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 5 of the 9 matched ingredients can interact with medications — Lysine, Phenylalanine, Taurine, Tyrosine, Threonine.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: lithium; Parkinson's medications.
  • For scale: 209 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Check your medications before taking this product if you use levodopa (Parkinson disease), NMDA antagonists (certain anesthetics), monoamine oxidase inhibitors or MAOIs (older antidepressants), baclofen (muscle relaxant), antihypertensive drugs (blood pressure medications), lithium (mood stabilizer), or 5-HT4 agonists (some gut motility drugs). These are the medication types with documented interactions; the severity ranges from Major to Minor.

Use the checker on this page with your exact drug names.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence for its stated purpose. Major medication interactions have been identified, and safety information is well characterized.

This product is designed for athletes and active people wanting to support muscle, energy, and performance — and some of its amino acids have evidence behind them. However, if you take any prescription medication, especially for Parkinson disease, mood, muscle spasticity, blood pressure, or mood stabilizers, you need to check with us or your pharmacist first.

Pregnant or breastfeeding? Talk to your doctor before starting.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 9 of 13 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Nov 25, 2014.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Performance Energy Punch, straight from the product label.

Brand ON Optimum Nutrition
Barcode (UPC) 748927050806
Net contents 12 oz.; 340 Gram(s)
Market status On market
Date entered into DSLD Nov 25, 2014
DSLD ID 39485
Product type Amino Acid/protein
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Sugar Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Performance Energy Punch by ON Optimum Nutrition, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
8.5 Gram(s)
Maximum serving Sizes:
8.5 Gram(s)
Servings per container
40
UPC/BARCODE
748927050806
IngredientAmount% DV
Calories10 {Calories}--
Total Carbohydrates2 Gram(s)1%
L-Alanine0 NP--
CarnoSyn0 NP--
L-Isoleucine, Micronized0 NP--
L-Valine, Micronized0 NP--
L-Citrulline, Micronized0 NP--
L-Threonine, Micronized0 NP--
L-Lysine, Micronized0 NP--
L-Phenylalanine, Micronized0 NP--
L-Tyrosine, Micronized0 NP--
L-Methionine, Micronized0 NP--
micronized Taurine0 NP--
L-Leucine, Micronized0 NP--
L-Histidine, Micronized0 NP--
Amino Blend5 Gram(s)--

Other ingredients: Citric Acid, Malic Acid, Natural Flavors, Tartaric Acid, Silicon Dioxide, Calcium Silicate, Gum Blend, Sucralose, Beet powder, Lecithin, Inulin

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Precautions

Phenylketonurics: Contains Phenylalanine

DO NOT EXCEED 3 SCOOPS IN ANY 4 HOUR PERIOD. DO NOT EXCEED 5 SCOOPS PER DAY.

WARNING: CONSULT YOUR PHYSICIAN BEFORE USING THIS PRODUCT IF YOU ARE TAKING ANY MEDICATIONS OR ARE UNDER A PHYSICIAN’S CARE FOR A MEDICAL CONDITION. NOT FOR USE BY THOSE UNDER THE AGE OF 18, WOMEN THAT ARE PREGNANT, TRYING TO GET PREGNANT, OR NURSING, OR THOSE THAT ARE SENSITIVE TO CAFFEINE OR BETA-ALANINE.

NOT FOR USE BY THOSE UNDER THE AGE OF 18, WOMEN THAT ARE PREGNANT, TRYING TO GET PREGNANT, OR NURSING, OR THOSE THAT ARE SENSITIVE TO CAFFEINE OR BETA-ALANINE.

DO NOT CONSUME CAFFEINE FROM OTHER SOURCES WHILE TAKING THIS PRODUCT AS TOO MUCH CAFFEINE MAY CAUSE NERVOUSNESS, IRRITABILITY, SLEEPLESSNESS, AND OCCASIONALLY RAPID HEARTBEAT. DO NOT COMBINE WITH ALCOHOL.

KEEP OUT OF REACH OF CHILDREN.

ALLERGEN INFORMATION: CONTAINS SOY (LECITHIN)

Formula

Each serving provides about the same amount of caffeine as a cup of coffee along with approximately 5 grams of amino acids – the building blocks of protein – to support muscle recovery and maintenance.

ALLERGEN INFORMATION: CONTAINS SOY (LECITHIN)

Phenylketonurics: Contains Phenylalanine

Brand IP Statement(s)

Performance Energy(TM) can be enjoyed any time of day as a substitute for coffee, tea and soft drinks.

Natural Alternatives International (NAI) is the owner of patents 5,965,596, 6,172,098, 6,426,361, 6,680,294 and registered trademark CarnoSyn(R).

Formulation

- SUGAR FREE

- NO ARTIFICIAL COLORS OR FLAVORS

General Statements

- JUST 10 CALORIES PER SERVING

DIAL-UP YOUR ENERGY & AMINOS SCOOP # ENERGY LEVEL AMINO LEVEL {1 SCOOP} MILD 5 GRAMS {2 SCOOPS} MODERATE 10 GRAMS {3 SCOOPS} INTENSE 15 GRAMS

{Chart} OCCASION # OF SCOOPS AM Wake up 1-2 BEFORE EXERCISE/COMPETITION 2-3 POST-WORKOUT RECOVERY 1-2 AFTERNOON PICK-ME-UP 1-2

SUPPORTS ENERGY & FOCUS DURING WORKOUTS HELPS WITH MUSCLE RECOVERY AFTER WORKOUTS

Naturally Flavored

40 SERVINGS

Total Caffeine from all sources is equal to 100mg per scoop.

When consumed as directed at maximum dosages.

Suggested/Recommended/Usage/Directions

CONSUME AS PART OF A HEALTHY DIET, AND DRINK AT LEAST 100 OZ OF WATER PER DAY. EXERCISE MAY INCREASE YOUR NEED FOR FLUID INTAKE.

BEFORE HEADING TO THE GYM OR OUT FOR A RUN, mix Performance Energy(TM) in cold water for a fruit flavored burst of energy and alertness.

Directions: Mix one scoop of PERFORMANCE ENERGY(TM) in 10-12 oz of cold water.

Seals/Symbols

FROM THE MAKERS OF ON(TM)

CarnoSyn(R) Carnitine Synthesizer

FDA Statement of Identity

DIETARY SUPPLEMENT

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration.This product is not intended to diagnose, treat, cure, or prevent any disease.

General

12-347-080

See for yourself

Performance Energy Punch by ON Optimum Nutrition label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

What’s inside

The Ingredients in Performance Energy Punch by ON Optimum Nutrition

These are the 13 active ingredients this product is made of. Select any to open its full monograph.

Serving size8.5 Gram(s) Dosage formPowder Servings per container40 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Amino Blend

5 Gram(s) per serving

Other (inactive) ingredients: Citric Acid, Malic Acid, Natural Flavors, Tartaric Acid, Silicon Dioxide, Calcium Silicate, Gum Blend, Sucralose, Beet powder, Lecithin, Inulin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Performance Energy Punch by ON Optimum Nutrition Drug Interactions

Want to check YOUR meds against Performance Energy Punch?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

Go to the checker
209Drugs
8 Major 200 Moderate 1 Minor

Each ingredient & the kinds of drugs it affects

For each ingredient in Performance Energy Punch with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

micronized Taurine2 drug types · 173 drugs

Antihypertensive Drugs

Theoretically, taurine might increase the risk of hypotension when taken with antihypertensive drugs.
Some clinical evidence suggests that taurine can reduce both systolic and diastolic blood pressure.

Likelihood Probable Evidence D
Lithium

Theoretically, taurine might reduce excretion and increase plasma levels of lithium.
Taurine is thought to have diuretic properties, which might reduce the excretion of lithium.

Likelihood Probable Evidence D

L-Tyrosine, Micronized2 drug types · 21 drugs

Levodopa

Theoretically, tyrosine might decrease the effectiveness of levodopa.
Tyrosine and levodopa compete for absorption in the proximal duodenum by the large neutral amino acid (LNAA) transport system. Advise patients to separate doses of tyrosine and levodopa by at least 2 hours.

Likelihood Probable Evidence D
Thyroid Hormone

Theoretically, tyrosine might have additive effects with thyroid hormone medications.
Tyrosine is a precursor to thyroxine and might increase levels of thyroid hormones.

Likelihood Probable Evidence D

L-Phenylalanine, Micronized3 drug types · 16 drugs

Levodopa

Phenylalanine, especially in high doses, can reduce the effectiveness of levodopa.
Phenylalanine competes with levodopa for carrier-mediated transport into the brain. The resulting reduction in levels of levodopa in the brain can exacerbate tremor, rigidity, and the "on-off" phenomenon in patients with Parkinson disease.

Likelihood Probable Evidence B
Baclofen

Concomitant intake of phenylalanine may reduce the intestinal absorption of baclofen.
Phenylalanine and baclofen share the same intestinal carrier for absorption; phenylalanine competitively inhibits the absorption of baclofen, reducing its plasma levels.

Likelihood Possible Evidence D
Monoamine Oxidase Inhibitors (Maois)

Theoretically, concomitant use of L-phenylalanine and non-selective MAOIs might increase the risk of hypertensive crisis.
L-phenylalanine is metabolized to tyrosine. Some evidence suggests that L-phenylalanine, given with the non-selective MAOI pargyline, might prevent the elimination of tyramine, increasing the risk of hypertensive crisis. However, this was not reported in a small number of patients when using L-phenylalanine with the partially selective MAO-B inhibitor, selegiline.

Likelihood Possible Evidence D

L-Threonine, Micronized1 drug type · 3 drugs

Nmda Antagonists

Theoretically, threonine might decrease the effects of NMDA antagonists.
Threonine increases central nervous system (CNS) glycine levels. Glycine seems to bind a site on NMDA receptors and enhance the activity of the receptors.

Likelihood Likely Evidence B

L-Lysine, Micronized1 drug type · 1 drug

5-Ht4 Agonists

Theoretically, lysine may reduce the effects of 5-HT4 agonists.
Animal research suggests that L-lysine is a partial serotonin receptor 4 (5-HT4) antagonist and inhibits diarrhea induced by the 5-HT4 agonist, 5-hydroxytryptophane.

Likelihood Unlikely Evidence D
The maker

Brand information

Manufacturer and brand details for Performance Energy Punch, from the product label.

ON Optimum Nutrition

See all ON Optimum Nutrition products
Name
OPTIMUM NUTRITION
Street Address
975 Meridian Lake Dr.
City
Aurora
State
IL
ZipCode
60504
Phone Number
1 (800) 705-5226
Web Address
OPTIMUMNUTRITION.COM
Pharmacist Counseling Corner

Performance Energy Punch by ON Optimum Nutrition: Common Questions

Does Performance Energy Punch by ON Optimum Nutrition interact with any medications?
Yes. Based on its ingredients, Performance Energy Punch has a known interaction with 209 medications, including 8 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Performance Energy Punch contains 13 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
What causes the tingling feeling from this product?
Beta-alanine (the CarnoSyn ingredient) causes that harmless skin tingling and flushing. It usually starts on your scalp about 20 minutes after you take it and spreads across your body, lasting roughly an hour. The tingling is milder at lower doses and more pronounced at higher ones — it's a normal effect, not dangerous.
Is this safe during pregnancy?
No. Beta-alanine and L-phenylalanine should be avoided in pregnancy because safety hasn't been established. L-tyrosine, L-lysine, L-threonine, and taurine also lack sufficient pregnancy safety data — talk to your doctor or midwife before taking this product if you're pregnant or planning to be.
Can I take this while breastfeeding?
Beta-alanine, L-phenylalanine, L-tyrosine, and L-lysine should be avoided while breastfeeding due to insufficient safety data. L-methionine and L-histidine are likely safe, and taurine occurs naturally in breast milk, but check with your doctor or pharmacist first — they can weigh the risks and benefits for your situation.
What is taurine in this product for?
Taurine is an amino acid that supports heart function and overall energy metabolism. In our data, it's possibly effective for congestive heart failure and hepatitis, though the evidence isn't conclusive. In an energy product, it's included to help fuel performance and recovery.
Does this product have any fillers or just amino acids?
It has inactive ingredients — citric acid, malic acid, natural flavors, silica, gum, sweetener, beet powder, lecithin, and inulin. These are typical for powder supplements; they add flavor, texture, and stability but aren't active ingredients. There are no unnecessary fillers beyond what's needed to make a functional product.
Will this interfere with my blood pressure medication?
It might. Taurine in this product can theoretically lower blood pressure, so taking it with blood pressure medications could increase your risk of going too low. Check your exact medication names in the tool on this page, and talk to your pharmacist before starting.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Performance Energy Punch is safe with your meds?

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Performance Energy Punch label
Go deeper

The Full Monographs Behind Performance Energy Punch’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Alpha-alanine

Alpha-alanine (usually called alanine) is a non-essential amino acid your body can make on its own and that you also get from protein foods. Most people do not need a supplement, and strong...

Read the full Alpha-alanine monograph →
Herb & supplement monograph

Beta-alanine

Beta-alanine is an amino acid taken mostly by athletes to raise muscle carnosine, which may help buffer acid and reduce fatigue during short, high-intensity exercise. The evidence is moderat...

Read the full Beta-alanine monograph →
Herb & supplement monograph

Threonine

Interacts with 3 drugs

Threonine is an essential amino acid your body needs but cannot make, so you must get it from food or supplements. Most people get plenty from a normal diet, and high-quality evidence for ta...

Read the full Threonine monograph →
Herb & supplement monograph

Lysine

Interacts with 1 drug

Lysine is an essential amino acid your body cannot make on its own, so it must come from food or supplements. People most often take extra lysine to try to prevent or shorten cold sores, but...

Read the full Lysine monograph →
Herb & supplement monograph

Phenylalanine

Interacts with 16 drugs

Phenylalanine is an essential amino acid the body uses to make brain chemicals like dopamine and norepinephrine. Some people take it for mood, vitiligo, or pain, but the evidence is mostly l...

Read the full Phenylalanine monograph →
Herb & supplement monograph

Tyrosine

Interacts with 21 drugs

L-tyrosine is an amino acid your body uses to make brain chemicals like dopamine and norepinephrine. Some studies suggest it may help mental performance during short-term stress, sleep loss,...

Read the full Tyrosine monograph →
Herb & supplement monograph

Methionine

Methionine is an essential amino acid that your body needs for protein building and many basic chemical reactions. Most people get enough from a normal diet, and supplements are generally no...

Read the full Methionine monograph →
Herb & supplement monograph

Taurine

Interacts with 173 drugs

Taurine is an amino acid your body makes naturally and that you also get from animal foods. It is widely used in energy drinks and sports supplements, and short-term use appears generally sa...

Read the full Taurine monograph →
Herb & supplement monograph

Histidine

Histidine is an essential amino acid your body needs to build proteins and to make compounds like histamine and carnosine. Most people get enough from a normal diet, and good-quality researc...

Read the full Histidine monograph →
Sources

Sources & How We Checked

Performance Energy Punch's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 89 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Alpha-alanine 2 references
  1. Amino acids — MedlinePlus (NIH) Source
  2. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source

See these in context on the Alpha-alanine monograph →

Beta-alanine 13 references
  1. Harris RC, Tallon MJ, Dunnett M, et al. The absorption of orally supplied beta-alanine and its effect on muscle carnosine synthesis in human vastus lateralis. Amino Acids 2006;30:279-89.
  2. Hill CA, Harris RC, Kim HJ, et al. Influence of beta-alanine supplementation on skeletal muscle carnosine concentrations and high intensity cycling capacity. Amino Acids 2007;32:225-33.
  3. Bellinger PM, Minahan CL. The effect of ß-alanine supplementation on cycling time trials of different length. Eur J Sport Sci 2016;16(7):829-36.
  4. Chung W, Shaw G, Anderson ME, et al. Effect of 10 week beta-alanine supplementation on competition and training performance in elite swimmers. Nutrients 2012;4(10):1441-53. PubMed
  5. Glenn JM, Gray M, Stewart R, et al. Incremental effects of 28 days of beta-alanine supplementation on high-intensity cycling performance and blood lactate in masters female cyclists. Amino Acids 2015;47(12):2593-600. PubMed
  6. Gross M, Bieri K, Hoppeler H, Norman B, Vogt M. Beta-alanine supplementation improves jumping power and affects severe-intensity performance in professional alpine skiers. Int J Sport Nutr Exerc Metab 2014;24(6):665-73. PubMed
  7. Howe ST, Bellinger PM, Driller MW, Shing CM, Fell JW. The effect of beta-alanine supplementation on isokinetic force and cycling performance in highly trained cyclists. Int J Sport Nutr Exerc Metab 2013;23(6):562-70. PubMed
  8. Sweeney KM, Wright GA, Glenn Brice A, Doberstein ST. The effect of beta-alanine supplementation on power performance during repeated sprint activity. J Strength Cond Res 2010;24(1):79-87.
  9. Décombaz J, Beaumont M, Vuichoud J, Bouisset F, Stellingwerff T. Effect of slow-release ß-alanine tablets on absorption kinetics and paresthesia. Amino Acids 2012;43(1):67-76. Erratum in: Amino Acids 2013;45(4):1015.
  10. Stellingwerff T, Anwander H, Egger A, et al. Effect of two ß-alanine dosing protocols on muscle carnosine synthesis and washout. Amino Acids 2012;42(6):2461-72. PubMed
  11. da Silva RP, de Oliveira LF, Saunders B, et al. Effects of ß-alanine and sodium bicarbonate supplementation on the estimated energy system contribution during high-intensity intermittent exercise. Amino Acids. 2019;51(1):83-96. PubMed
  12. Varanoske AN, Hoffman JR, Church DD, et al. Comparison of sustained-release and rapid-release ß-alanine formulations on changes in skeletal muscle carnosine and histidine content and isometric performance following a muscle-damaging protocol. Amino Acids. PubMed
  13. Perim P, Gobbi N, Duarte B, et al. Beta-alanine did not improve high-intensity performance throughout simulated road cycling. Eur J Sport Sci 2021. PubMed

See these in context on the Beta-alanine monograph →

Threonine 4 references
  1. Tandan R, Bromberg MB, Forshew D, et al. A controlled trial of amino acid therapy in amyotrophic lateral sclerosis: I. Clinical, functional, and maximum isometric torque data. Neurology 1996;47:1220-6. PubMed
  2. Lee A, Patterson V. A double blind study of L-threonine in patients with spinal spasticity. Acta Neurol Scand 1993;88:334-8. PubMed
  3. Blin O, Pouget J, Aubrespy G, et al. A double-blind placebo controlled trial of L-threonine in amyotrophic lateral sclerosis. J Neurol 1992;239:79-81.
  4. Roufs JB. L-threonine as a symptomatic treatment for amyotrophic lateral sclerosis (ALS). Med Hypotheses 1991;34:20-3. PubMed

See these in context on the Threonine monograph →

Lysine 7 references
  1. Thein DJ, Hurt WC. Lysine as a prophylactic agent in the treatment of recurrent herpes simplex labialis. Oral Surg Oral Med Oral Pathol 1984;58:659-66. PubMed
  2. McCune MA, Perry HO, Muller SA, O'Fallon WM. Treatment of recurrent herpes simplex infections with L-lysine monohydrochloride. Cutis 1984;34:366-73.
  3. DiGiovanna JJ, Blank H. Failure of lysine in frequently recurrent herpes simplex infection. Treatment and prophylaxis. Arch Dermatol 1984;120:48-51. DOI
  4. Milman N, Scheibel J, Jessen O. Lysine prophylaxis in recurrent herpes simplex labialis: a double-blind, controlled crossover study. Acta Derm Venereol 1980;60:85-7.
  5. Griffith RS, Walsh DE, Myrmel KH, et al. Success of L-lysine therapy in frequently recurrent herpes simplex infection. Treatment and prophylaxis. Dermatologica 1987;175:183-90. DOI
  6. Lo JC, Chertow GM, Rennke H, Seifter JL. Fanconi's syndrome and tubulointerstitial nephritis in association with L-lysine ingestion. Am J Kidney Dis 1996;28:614-7. PubMed
  7. Smriga M, Torii K. L-Lysine acts like a partial serotonin receptor 4 antagonist and inhibits serotonin-mediated intestinal pathologies and anxiety in rats. Proc Natl Acad Sci U S A. 2003 Dec 23;100(26):15370-5.

See these in context on the Lysine monograph →

Phenylalanine 23 references
  1. Rouse B, Azen C, Koch R, et al. Maternal phenylketonuria collaborative Study (MPKUCS) offspring: facial anomalies, malformations, and early neurological sequelae. Am J Med Genet 1997;69:89-95. DOI
  2. Sturtevant FM. Use of aspartame in pregnancy. Int J Fertil 1985;30:85-7.
  3. Silkaitis RP, Mosnaim AD. Pathways linking L-phenylalanine and 2-phenylethylamine with p-tyramine in rabbit brain. Brain Res 1976;114:105-15.
  4. Lehmann WD, Theobald N, Fischer R, Heinrich HC. Stereospecificity of phenylalanine plasma kinetics and hydroxylation in man following oral application of a stable isotope-labelled pseudo-racemic mixture of L- and D-phenylalanine. Clin Chim Acta 1983;128 PubMed
  5. Mosnik DM, Spring B, Rogers K, Baruah S. Tardive dyskinesia exacerbated after ingestion of phenylalanine by schizophrenic patients. Neuropsychopharmacology 1997;16:136-46. PubMed
  6. Siddiqui AH, Stolk LM, Bhaggoe R, et al. L-phenylalanine and UVA irradiation in the treatment of vitiligo. Dermatology 1994;88:215-8. PubMed
  7. Birkmayer W, Riederer P, Linauer W, Knoll J. L-deprenyl plus L-phenylalanine in the treatment of depression. J Neural Transm 1984;59:81-7. PubMed
  8. Nutt JG, Woodward WR, Hammerstad JP, et al. The "on-off" phenomenon in Parkinson's disease. Relation to levodopa absorption and transport. N Engl J Med 1984;310:483-8. PubMed
  9. Baruzzi A, Contin M, Riva R, et al. Influence of meal ingestion time on pharmacokinetics of orally administered levodopa in parkinsonian patients. Clin Neuropharmacol 1987;10:527-37. PubMed
  10. Juncos JL, Fabbrini G, Mouradian MM, et al. Dietary influences on the antiparkinsonian response to levodopa. Arch Neurol 1987;44:1003-5. PubMed
  11. Eriksson T, Granerus AK, Linde A, et al. "On-off" phenomenon in Parkinson's disease: relationship between dopa and other large neutral amino acids in plasma. Neurology 1988;38:1245-8. PubMed
  12. Baker GB, Bornstein RA, Rouget AC, et al. Phenylethylaminergic mechanisms in attention-deficit disorder. Biol Psychiatry 1991;29:15-22.. PubMed
  13. Wood DR, Reimherr FW, Wender PH. Treatment of attention deficit disorder with DL-phenylalanine. Psychiatry Res 1985;16:21-6.. PubMed
  14. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). Washington, DC: National Academy Press, 2002. Available at: http://www.n
  15. Cederbaum S. Phenylketonuria: an update. Curr Opin Pediatr 2002;14:702-6. PubMed
  16. Cejudo-Ferragud, E., Nacher, A., Polache, A., Cercos-Fortea, T., Merino, M., and Casabo, V. G. Evidence of competitive inhibition for the intestinal absorption of baclofen by phenylalanine. Int J of Pharm (Amsterdam) 1996;132:63-69. DOI
  17. Fischer, E., Heller, B., Nachon, M., and Spatz, H. Therapy of depression by phenylalanine. Preliminary note. Arzneimittelforschung. 1975;25(1):132.
  18. Beckmann, H., Strauss, M. A., and Ludolph, E. Dl-phenylalanine in depressed patients: an open study. J.Neural Transm. 1977;41(2-3):123-134. PubMed
  19. Sabelli, H. C., Fawcett, J., Gusovsky, F., Javaid, J. I., Wynn, P., Edwards, J., Jeffriess, H., and Kravitz, H. Clinical studies on the phenylethylamine hypothesis of affective disorder: urine and blood phenylacetic acid and phenylalanine dietary supplem
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  21. Kravitz, H. M., Sabelli, H. C., and Fawcett, J. Dietary supplements of phenylalanine and other amino acid precursors of brain neuroamines in the treatment of depressive disorders. J Am Osteopath.Assoc 1984;84(1 Suppl):119-123. DOI
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  23. Katoulis AC, Alevizou A, Bozi E, et al. A randomized, double-blind, vehicle-controlled study of a preparation containing undecylenoyl phenylalanine 2% in the treatment of solar lentigines. Clin Exp Dermatol 2010;35(5):473-6. PubMed

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Tyrosine 4 references
  1. Meyer JS, Welch KM, Deshmukh VD, et al. Neurotransmitter precursor amino acids in the treatment of multi-infarct dementia and Alzheimer's disease. J Amer Geriat Soc 1977;25:289-98.
  2. DiPiro JT, Talbert RL, Yee GC, et al; eds. Pharmacotherapy: A pathophysiologic approach. 4th ed. Stamford, CT: Appleton & Lange, 1999.
  3. Wood DR, Reimherr FW, Wender PH. Amino acid precursors for the treatment of attention deficit disorder, residual type. Psychopharmacol Bull 1985;21:146-9.
  4. van Spronsen FJ, van Rijn M, Bekhof J. Phenylketonuria: tyrosine supplementation in phenylalanine-restricted diets. Am J Clin Nutr 2001;73:153-7. PubMed

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Methionine 12 references
  1. La Vecchia C, Negri E, Franceschi S, Decarli A. Case-control study on influence of methionine, nitrite, and salt on gastric carcinogenesis in northern Italy. Nutr Cancer 1997;27:65-8. PubMed
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  6. McAuley, D. F., Hanratty, C. G., McGurk, C., Nugent, A. G., and Johnston, G. D. Effect of methionine supplementation on endothelial function, plasma homocysteine, and lipid peroxidation. J.Toxicol.Clin.Toxicol. 1999;37(4):435-440. PubMed
  7. Hanratty, C. G., McGrath, L. T., McAuley, D. F., Young, I. S., and Johnston, G. D. The effects of oral methionine and homocysteine on endothelial function. Heart 2001;85(3):326-330. PubMed
  8. Ward, M., McNulty, H., McPartlin, J., Strain, J. J., Weir, D. G., and Scott, J. M. Effect of supplemental methionine on plasma homocysteine concentrations in healthy men: a preliminary study. Int.J.Vitam.Nutr.Res. 2001;71(1):82-86. PubMed
  9. Yaghmai, R., Kashani, A. H., Geraghty, M. T., Okoh, J., Pomper, M., Tangerman, A., Wagner, C., Stabler, S. P., Allen, R. H., Mudd, S. H., and Braverman, N. Progressive cerebral edema associated with high methionine levels and betaine therapy in a patient
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  11. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. Washington, DC: The National Academies Press, 2005. Available at: https://doi.org/10.17226 DOI
  12. Khairan P, Sobue T, Eshak ES, et al. Association of B Vitamins and Methionine Intake with the Risk of Gastric Cancer: The Japan Public Health Center-based Prospective Study. Cancer Prev Res (Phila) 2022;15(2):101-110. PubMed

See these in context on the Methionine monograph →

Taurine 21 references
  1. Ahmad S, Robertson HT, Golper TA, et al. Multicenter trial of L-carnitine in maintenance hemodialysis patients. II. Clinical and biochemical effects. Kidney Int 1990;38:912-8. PubMed
  2. Machado-Vieira R, Viale CI, Kapczinski F. Mania associated with an energy drink: the possible role of caffeine, taurine, and inositol. Can J Psychiatry 2001;46:454-5. PubMed
  3. Obermann M, Schorn CF, Mummel P, et al. Taurine induced toxic encephalopathy? Clin Neurol Neurosurg 2006;108:812-3. PubMed
  4. Bichler, A., Swenson, A., and Harris, M. A. A combination of caffeine and taurine has no effect on short term memory but induces changes in heart rate and mean arterial blood pressure. Amino Acids 2006;31(4):471-476. PubMed
  5. Iyadurai, S. J. and Chung, S. S. New-onset seizures in adults: possible association with consumption of popular energy drinks. Epilepsy Behav 2007;10(3):504-508. PubMed
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  7. Worthley, M. I., Prabhu, A., De, Sciscio P., Schultz, C., Sanders, P., and Willoughby, S. R. Detrimental effects of energy drink consumption on platelet and endothelial function. Am J Med 2010;123(2):184-187. PubMed
  8. Morchon, Simon D. and Perez Castrillon, J. L. [Hypoglycemia by intake of taurine]. Rev.Clin Esp. 2010;210(1):49.
  9. Livshits, Z., Hoffman, R. S., Hymes, K. B., and Nelson, L. S. If vitamins could kill: massive hemolysis following naturopathic vitamin infusion. J Med Toxicol. 2011;7(3):224-226. PubMed
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  11. Calabro, R. S., Italiano, D., Gervasi, G., and Bramanti, P. Single tonic-clonic seizure after energy drink abuse. Epilepsy Behav 2012;23(3):384-385. PubMed
  12. Fujita, T., Ando, K., Noda, H., Ito, Y., and Sato, Y. Effects of increased adrenomedullary activity and taurine in young patients with borderline hypertension. Circulation 1987;75(3):525-532. PubMed
  13. Darling, P. B., Lepage, G., Leroy, C., Masson, P., and Roy, C. C. Effect of taurine supplements on fat absorption in cystic fibrosis. Pediatr Res 1985;19(6):578-582. PubMed
  14. Fukuyama, Y. and Ochiai, Y. Therapeutic trial by taurine for intractable childhood epilepsies. Brain Dev. 1982;4(1):63-69. PubMed
  15. Franconi, F., Bennardini, F., Mattana, A., Miceli, M., Ciuti, M., Mian, M., Gironi, A., Anichini, R., and Seghieri, G. Plasma and platelet taurine are reduced in subjects with insulin-dependent diabetes mellitus: effects of taurine supplementation. Am.J. DOI
  16. Stohs SJ, Miller M. A case study involving allergic reactions to sulfur-containing compounds including, sulfite, taurine, acesulfame potassium and sulfonamides. Food Chem Toxicol. 2014 Jan;63:240-3. PubMed
  17. Sun Q, Wang B, Li Y, Sun F, et al. Taurine supplementation lowers blood pressure and improves vascular function in prehypertension: randomized, double-blind, placebo-controlled study. Hypertension 2016 Mar;67(3):541-9. PubMed
  18. Jang ES, Hwang SH, Kim JW, Jeong SH. Effectiveness of 4-week oral taurine treatment for muscle cramps in patients with liver cirrhosis: a single-arm pilot study. Yonsei Med J 2021;62(1):21-8. PubMed
  19. Guan L, Miao P. The effects of taurine supplementation on obesity, blood pressure and lipid profile: A meta-analysis of randomized controlled trials. Eur J Pharmacol 2020;885:173533. PubMed
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  21. Pallangyo P, Bhalia SV, Komba M, et al. Acute Myocardial Infarction Following the Consumption of Energy Drink in a 28-Year-Old Male: A Case Report. J Investig Med High Impact Case Rep. 2023 Jan-Dec;11:23247096231168811. PubMed

See these in context on the Taurine monograph →

Histidine 3 references
  1. Histidine — MedlinePlus (U.S. National Library of Medicine) Source
  2. Amino Acids — MedlinePlus (U.S. National Library of Medicine) Source
  3. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source

See these in context on the Histidine monograph →

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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

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