Major interaction on record — check this product against your medications before combining. Based on 11 of 14 ingredients. Check your meds →
Dietary supplement

Essentials Tangerine Flavor Ingredients & Drug Interactions

by Muscle Feast

Powder Category: Other Combinations
Most serious interaction: Major
The interaction bottom line Most serious interaction: Major

Essentials Tangerine Flavor is a dietary supplement by Muscle Feast with 14 active ingredients. Its ingredients are commonly taken for morning sickness in pregnancy, premenstrual syndrome (pms), preventing or treating b6 deficiency.Based on those ingredients, 789 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are L-Arginine, L-Tryptophan, Vitamin B6. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of Essentials Tangerine Flavor by Muscle Feast

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

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 14 of its 14 active ingredients.
  • “PoolEAA” is listed as a grouped ingredient — the label gives one combined amount (5,500 mg) without saying how much of each component you get.

Muscle Feast Essentials Tangerine Flavor is a powder blend of 14 active ingredients: the amino acids L-leucine, L-arginine, L-alanine, L-isoleucine, L-methionine, L-lysine hydrochloride, L-phenylalanine, L-valine, L-glycine, L-aspartic acid, L-threonine, L-tryptophan, and L-taurine, plus vitamin B6. These amino acids support protein synthesis and muscle function; the formula also contains a proprietary blend labeled PoolEAA (essential amino acids).

The product is completed with inactive ingredients—citric acid, malic acid, tangerine flavor, acesulfame potassium, sucralose, beta-carotene, and sunflower lecithin—which serve as sweeteners, flavor, and texture aids.

Does it work?

Not established
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
Not established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use.

Why this rating?
  • The label markets this product for: support amino acid pooling and post-exercise recovery.
  • We looked for evidence on: Athletic performance, Exercise-induced muscle soreness, muscle protein synthesis, amino acid balance, training recovery.
  • The closest evidence on file: Aspartic Acid is rated "Insufficient Reliable Evidence To Rate" for Athletic performance (Natural Medicines).
  • Also on file: Lysine is rated "Insufficient Reliable Evidence To Rate" for Athletic performance.
  • Also on file: L-tryptophan is rated "Insufficient Reliable Evidence To Rate" for Athletic performance.

Effectiveness data in our files is sparse for this product as a whole. Vitamin B6 is rated Effective for sideroblastic anemia and B6 deficiency, and Possibly Effective for pregnancy-related nausea.

L-lysine is Possibly Effective for cold sores. L-methionine is Possibly Effective for neural tube birth defects.

L-tryptophan is Possibly Ineffective for depression. L-taurine is Possibly Effective for hepatitis and heart failure, though Possibly Ineffective for weight loss.

The remaining amino acids have either no established evidence (L-alanine, L-aspartic acid, L-glycine, L-threonine) or are rated Possibly Ineffective or have insufficient evidence (L-phenylalanine for ADHD). For muscle function and athletic performance—the likely intended use of this product—the evidence we hold does not confirm benefit.

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 9 of the 11 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 11 of 11.
  • General safety write-ups exist for 11 of 11.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin B6 is well tolerated at standard doses but can cause nerve damage (sensory neuropathy) at high doses over time or with total cumulative intake above 1,000 grams. L-arginine and L-tryptophan are generally well tolerated short-term but carry limited long-term safety data.

L-tryptophan has a historical safety flag: in 1989, a contaminated batch from a single Japanese manufacturer caused over 1,500 cases of a serious neurological disorder called eosinophilia-myalgia syndrome (EMS); the product was recalled in the US and is now restricted. L-methionine may lower blood pressure and raise homocysteine levels at high doses.

L-phenylalanine is contraindicated in phenylketonuria (PKU). Most common adverse effects reported across these ingredients are mild—abdominal pain, nausea, headache, diarrhea—and resolve on discontinuation.

Regarding pregnancy and lactation: vitamin B6 is rated Likely Safe but also Possibly Unsafe (conflicting data); L-arginine is Possibly Safe in pregnancy; L-alanine, L-methionine, L-taurine, and L-tryptophan are Likely Safe in pregnancy; L-phenylalanine is Unsafe in pregnancy; and L-lysine, L-glycine, L-threonine, and L-tryptophan lack sufficient pregnancy or lactation data on file. If you are pregnant or nursing, discuss this product with your doctor or pharmacist before starting.

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?
  • 8 of the 11 matched ingredients can interact with medications — Lysine, L-tryptophan, Phenylalanine, L-arginine, Vitamin B6, among others.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; diabetes medications; lithium; Parkinson's medications.
  • For scale: 789 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.

Before taking this product, check with your doctor or pharmacist if you take any of the following: medications for Parkinson disease (levodopa), seizure medications (phenobarbital, phenytoin), antiarrhythmic drugs (amiodarone), CNS depressants (sedatives, sleep aids, opioids), antidepressants or serotonin-boosting medications, blood pressure medications (especially ACE inhibitors and ARBs), blood thinners or antiplatelet drugs, diabetes medications, potassium-sparing diuretics, lithium, or baclofen. Major-severity interactions may significantly reduce medication effectiveness or cause dangerous side effects.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Major medication interactions have been identified, and safety information is well characterized.

This product is a multi-amino-acid supplement intended for muscle support, but effectiveness for that use is not established in the data we hold. The main concern is the number and severity of documented drug interactions—particularly with Parkinson, seizure, blood pressure, psychiatric, and blood-thinning medications.

If you take any prescription drugs, check them against the interaction tool on this page. Even if no interactions show up, discuss this product with your own doctor or pharmacist before adding it, especially if you are pregnant, nursing, or have liver or kidney disease.

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

Assessment coverage: 11 of 14 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated May 19, 2022.

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 Essentials Tangerine Flavor, straight from the product label.

Brand Muscle Feast
Net contents 10.58 Oz(s); 300 Gram(s)
Market status On market
Date entered into DSLD May 19, 2022
DSLD ID 261840
Product type Other Combinations
Supplement form Powder
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Women (not pregnant or lactating), No Allergies, Gluten 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 Essentials Tangerine Flavor by Muscle Feast, 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:
9.2 Gram(s)
Maximum serving Sizes:
27.6 Gram(s)
Servings per container
32
IngredientAmount% DV
Vitamin B685 mg400%
L-Leucine886 mg--
L-Arginine518 mg--
L-Alanine480 mg--
L-Isoleucine589 mg--
L-Methionine271 mg--
L-Lysine Hydrochloride644 mg--
L-Phenylalanine468 mg--
L-Valine292 mg--
L-Glycine288 mg--
L-Aspartic Acid238 mg--
L-Threonine424 mg--
L-Tryptophan106 mg--
L-Taurine295 mg--
PoolEAA5500 mg--

Other ingredients: Citric Acid, Malic Acid, natural Tangerine flavor, Acesulfame Potassium, Sucralose, Beta-Carotene, Sunflower Lecithin

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.
Formulation

Muscle Feast Essentials w/PoolEAA is designed to support "amino acid pooling", which allows your body the most efficient groupings of key amino acids to meet your individuals needs. Essential amino acids or EAAs can help decrease post exercise soreness, stimulate muscle growth, and assist in maintaining lean mass during periods of calorie restriction.

Certified Vegan AVA American Vegetarian Association

Rapid Amino Absorption/Build and Repair Muscles

Gluten free Soy free Non GMO

Allergies: None

Suggested/Recommended/Usage/Directions

Suggested use: As an adult dietary supplement, take 1-2 servings with each meal or 2-3 servings during caloric restriction. Individuals engaged in intensive training or weigh over 200lbs should consume at least 2-3 servings. Mix 1 level (9.2g) scoop with 8-12 oz. water or beverage of choice.

Storage

Keep tightly closed in a cool, dry place away from sunlight.

Precautions

Keep out of reach of children.

Do not exceed the recommended dose. Consult your physician before using this product.

Do not use this product if you are pregnant or nursing. Do not use this product if you are taking any prescription medication.

Do not use this product if you are under the age of 18.

Warning: This product is manufactured in a GMP compliant plant that processes milk.

FDA Disclaimer Statement

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

Seals/Symbols

Made in our GMP compliant facility Made in an FDA Registered Facility Certified Vegan AVA American Vegetarian Association

General Statements

SDVOSB Service Distributed Veteran Owned Small Business CVE

Ohio family owned business

FDA Statement of Identity

Dietary Supplement

Formula

Essential Amino Acids with PooIEAA

See for yourself

Essentials Tangerine Flavor by Muscle Feast label

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

What’s inside

The Ingredients in Essentials Tangerine Flavor by Muscle Feast

These are the 14 active ingredients this product is made of. Select any to open its full monograph.

Serving size9.2 Gram(s) Dosage formPowder Servings per container32 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.

Vitamin B6

Interacts with
210 drugs
85 mg per serving Form: Pyridoxine Hydrochloride

Vitamin B6 (pyridoxine) is an essential water-soluble vitamin that your body needs for metabolism, brain function, and making red blood cells. It is b...

Vitamin B6 monograph & interactions

PoolEAA

5500 mg per serving

Other (inactive) ingredients: Citric Acid, Malic Acid, Natural Tangerine flavor, Acesulfame Potassium, Sucralose, Beta-Carotene, Sunflower Lecithin. These complete the product’s ingredient list but are not active constituents.

Interaction report

Essentials Tangerine Flavor by Muscle Feast Drug Interactions

Want to check YOUR meds against Essentials Tangerine Flavor?

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
789Drugs
256 Major 525 Moderate 8 Minor

Ingredients driving the most interactions

L-Taurine 173

Each ingredient & the kinds of drugs it affects

For each ingredient in Essentials Tangerine Flavor 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.

L-Arginine9 drug types · 403 drugs

Ace Inhibitors (Aceis)

Theoretically, concomitant use of L-arginine and ACE inhibitors may increase the risk for hypotension and hyperkalemia.
Combining L-arginine with some antihypertensive drugs, especially ACE inhibitors, seems to have additive vasodilating and blood pressure-lowering effects. Furthermore, ACE inhibitors can increase potassium levels. Use of L-arginine has been associated with hyperkalemia in some patients. Theoretically, concomitant use of ACE inhibitors with L-arginine may increases the risk of hyperkalemia.

Likelihood Probable Evidence D
Angiotensin Receptor Blockers (Arbs)

Theoretically, concomitant use of L-arginine and ARBs may increase the risk of hypotension and hyperkalemia.
L-arginine increases nitric oxide, which causes vasodilation. Combining L-arginine with ARBs seems to increase L-arginine-induced vasodilation. Furthermore, ARBs can increase potassium levels. Use of L-arginine has been associated with hyperkalemia in some patients. Theoretically, concomitant use of ARBs with L-arginine may increases the risk of hyperkalemia.

Likelihood Probable Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, concomitant use of L-arginine with anticoagulant and antiplatelet drugs might have additive effects and increase the risk of bleeding.
Preliminary research suggests that L-arginine infusions reduce platelet aggregation in humans. The clinical significance of this effect is unclear.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, concomitant use of L-arginine might have additive effects with antidiabetes drugs.
Preliminary clinical research shows that L-arginine decreases blood glucose levels in patients with type 2 diabetes.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, concomitant use of L-arginine and antihypertensive drugs may increase the risk of hypotension.
L-arginine increases nitric oxide, which causes vasodilation. Clinical evidence shows that L-arginine can reduce blood pressure in some individuals with hypertension. Furthermore, combining L-arginine with some antihypertensive drugs seems to have additive vasodilating and blood pressure-lowering effects.

Likelihood Probable Evidence D
Isoproterenol (Isuprel)

Theoretically, concurrent use of isoproterenol and L-arginine might result in additive effects and hypotension.
Preliminary clinical evidence suggests that L-arginine enhances isoproterenol-induced vasodilation in patients with essential hypertension or a family history of essential hypertension.

Likelihood Probable Evidence D
Potassium-Sparing Diuretics

Theoretically concomitant use of potassium-sparing diuretics with L-arginine may increases the risk of hyperkalemia.
Potassium-sparing diuretics can increase potassium levels. Use of L-arginine has been associated with hyperkalemia in some patients.

Likelihood Possible Evidence D
Sildenafil (Viagra)

Theoretically, concurrent use of sildenafil and L-arginine might increase the risk for hypotension.
In vivo, concurrent use of L-arginine and sildenafil has resulted in increased vasodilation. Theoretically, concurrent use might have additive vasodilatory and hypotensive effects. However, in studies evaluating the combined use of L-arginine and sildenafil for erectile dysfunction, hypotension was not reported.

Likelihood Possible Evidence D
Testosterone

Theoretically, concomitant use of L-arginine and testosterone might have additive effects.
In clinical research, L-arginine increases the level of testosterone in male patients with erectile dysfunction. The clinical significance of this finding is unclear.

Likelihood Possible Evidence D

L-Tryptophan2 drug types · 394 drugs

Cns Depressants

Theoretically, concomitant use of L-tryptophan with CNS depressants might cause additive sedative effects.
Clinical research shows that L-tryptophan can cause fatigue and drowsiness.

Likelihood Probable Evidence B
Serotonergic Drugs

Theoretically, combining L-tryptophan with serotonergic drugs might cause additive serotonergic effects.
L-tryptophan is a precursor to serotonin. Theoretically, combining serotonergic drugs with L-tryptophan might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.

Likelihood Possible Evidence D

Vitamin B65 drug types · 210 drugs

Amiodarone (Cordarone)

Theoretically, vitamin B6 might increase the photosensitivity caused by amiodarone.
Despite initial case reports suggesting that pyridoxine may have a protective effect against amiodarone-induced photosensitivity, preliminary clinical research suggests that pyridoxine may actually exacerbate this adverse effect.

Likelihood Possible Evidence B
Antihypertensive Drugs

Theoretically, vitamin B6 may have additive effects when used with antihypertensive drugs.
Research in hypertensive rats shows that vitamin B6 can decrease systolic blood pressure. Similarly, clinical research in patients with hypertension shows that taking high doses of vitamin B6 may reduce systolic and diastolic blood pressure, possibly by reducing plasma levels of epinephrine and norepinephrine.

Likelihood Possible Evidence B
Phenobarbital (Luminal)

High doses of vitamin B6 may reduce the levels and clinical effects of phenobarbital.
Preliminary clinical evidence suggests that vitamin B6 200 mg daily can reduce plasma levels of phenobarbital, possibly by increasing metabolism. It is not known whether lower doses have any effect. Advise people taking phenobarbital to avoid high doses of vitamin B6.

Likelihood Possible Evidence D
Phenytoin (Dilantin)

High doses of vitamin B6 may reduce the levels and clinical effects of phenytoin.
Preliminary clinical evidence suggests that vitamin B6 200 mg daily can reduce plasma levels of phenytoin, possibly by increasing metabolism. It is not known whether lower doses have any effect. Advise people taking phenytoin to avoid high doses of vitamin B6.

Likelihood Possible Evidence D
Levodopa

Vitamin B6 may increase the metabolism of levodopa when taken alone, but not when taken in conjunction with carbidopa.
Vitamin B6 (pyridoxine) enhances the metabolism of levodopa, reducing its clinical effects. However, this interaction does not occur when carbidopa is used concurrently with levodopa (Sinemet). Therefore, it is not likely to be a problem in most people.

Likelihood Unlikely Evidence D

L-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-Phenylalanine3 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-Threonine1 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 Hydrochloride1 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

L-Glycine1 drug type · 1 drug

Clozapine (Clozaril)

Theoretically, glycine might decrease the effectiveness of clozapine.
One small clinical study in patients with schizophrenia shows that adding glycine to clozapine therapy worsens symptoms of schizophrenia when compared with clozapine alone. The mechanism of this interaction is unclear.

Likelihood Probable Evidence B
The maker

Brand information

Manufacturer and brand details for Essentials Tangerine Flavor, from the product label.

Muscle Feast

See all Muscle Feast products
Name
Muscle Feast
Street Address
1320 Boston Road
City
Nashport
State
OH
ZipCode
43830
Phone Number
(888) 734-3634
Web Address
www.musclefeast.com
Pharmacist Counseling Corner

Essentials Tangerine Flavor by Muscle Feast: Common Questions

Does Essentials Tangerine Flavor by Muscle Feast interact with any medications?
Yes. Based on its ingredients, Essentials Tangerine Flavor has a known interaction with 789 medications, including 256 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Essentials Tangerine Flavor contains 14 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.
Does this product contain amino acids that interact with antidepressants?
Yes. L-tryptophan in this product may add serotonergic effects when combined with antidepressants or other serotonin-active drugs, theoretically raising the risk of serotonin syndrome and related side effects. Talk to your doctor before combining this supplement with any mood medication.
Is this safe to take if I'm on a blood pressure medication?
Not without checking first. Both vitamin B6 and L-arginine may lower blood pressure further when combined with antihypertensive drugs, and L-arginine also interacts with ACE inhibitors and ARBs in ways that could raise potassium. L-taurine also theoretically increases hypotension risk. Contact your doctor or pharmacist with a list of your exact medications before starting.
Can I take this if I have Parkinson disease and take levodopa?
No, not without explicit approval from your doctor. L-phenylalanine in this product can reduce levodopa's effectiveness by competing for transport into the brain, potentially worsening tremor and rigidity. This is a Major-severity interaction; do not start this product without discussing it first.
What's the most common side effect I might notice?
Mild stomach upset—nausea, abdominal pain, diarrhea, or heartburn—is the most frequently reported adverse effect across these amino acids. These usually resolve quickly if the product is stopped. Headache and drowsiness can also occur.
Is it safe to take this during pregnancy?
Data on file are mixed and incomplete. Vitamin B6 shows conflicting safety ratings; L-phenylalanine is rated Unsafe; and several amino acids lack enough pregnancy data to know either way. Do not take this product during pregnancy without talking to your doctor or pharmacist first.
Does this product contain all essential amino acids?
The label lists 13 amino acids individually plus a proprietary blend called PoolEAA (essential amino acids). The product contains the essential amino acids L-leucine, L-isoleucine, L-valine, L-lysine, L-phenylalanine, L-methionine, and L-threonine, but the exact amino acid profile and amounts in PoolEAA are not detailed on the facts provided.

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

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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.

Essentials Tangerine Flavor label
Go deeper

The Full Monographs Behind Essentials Tangerine Flavor’s Ingredients

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

Herb & supplement monograph

Vitamin B6

Interacts with 210 drugs

Vitamin B6 (pyridoxine) is an essential water-soluble vitamin that your body needs for metabolism, brain function, and making red blood cells. It is best known for helping with pregnancy-rel...

Read the full Vitamin B6 monograph →
Herb & supplement monograph

L-arginine

Interacts with 403 drugs

L-arginine is an amino acid that the body uses to make nitric oxide, a substance that helps blood vessels relax and widen. It is popularly used for blood pressure, erectile dysfunction, and...

Read the full L-arginine monograph →
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

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

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

Glycine

Interacts with 1 drug

Glycine is a non-essential amino acid your body makes on its own and that also appears in protein-rich foods. It is most studied for improving sleep quality, where early research is promisin...

Read the full Glycine monograph →
Herb & supplement monograph

Aspartic Acid

Aspartic acid is a common amino acid your body makes on its own and gets from protein-rich foods, so a true deficiency is rare. D-aspartic acid is heavily marketed for boosting testosterone...

Read the full Aspartic Acid 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

L-tryptophan

Interacts with 394 drugs

L-tryptophan is an essential amino acid the body uses to make serotonin and melatonin, and people take it to support sleep and mood. The evidence for supplement use is limited and mixed, and...

Read the full L-tryptophan 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 →
Sources

Sources & How We Checked

Essentials Tangerine Flavor'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 191 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.

Vitamin B6 32 references
  1. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
  2. Yates AA, Schlicker SA, Suitor CW. Dietary reference intakes: The new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J Am Diet Assoc 1998;98:699-706. PubMed
  3. Geerling BJ, Dagnelie PC, Badart-Smook A, et al. Diet as a risk factor for the development of ulcerative colitis. Am J Gastroenterol 2000;95:1008-13. PubMed
  4. South M. Neonatal seizures after pyridoxine use -- reply. Lancet 1999;354:2083. PubMed
  5. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (2000). Washington, DC: National Academy Press, 2000. Available at: http://b
  6. Baxter P, Aicardi J. Neonatal seizures after pyridoxine use. Lancet 1999;354:2082-3. PubMed
  7. Bendich A, Cohen M. Vitamin B6 safety issues. Ann N Y Acad Sci 1990;585:321-30.
  8. Schaumburg H, Kaplan J, Windebank A. Sensory neuropathy from pyridoxine abuse. A new megavitamin syndrome. N Engl J Med 1983;309:445-8. PubMed
  9. Gordon N. Pyridoxine dependency: an update. Dev Med Child Neurol 1997;39:63-5. PubMed
  10. Lewis PJ. Pain in the hand and wrist. Pyridoxine supplements may help patients with carpal tunnel syndrome. BMJ 1995;310:1534. PubMed
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L-arginine 66 references
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Alpha-alanine 2 references
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Glycine 5 references
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Aspartic Acid 1 reference
  1. 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

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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
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  4. Roufs JB. L-threonine as a symptomatic treatment for amyotrophic lateral sclerosis (ALS). Med Hypotheses 1991;34:20-3. PubMed

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L-tryptophan 18 references
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  10. Klein R, Berg PA. A comparative study on antibodies to nucleoli and 5-hydroxytryptamine in patients with fibromyalgia syndrome and tryptophan-induced eosinophilia-myalgia syndrome. Clin Investig 1994;72:541-9.. PubMed
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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
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  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
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  20. Higgins JP, Liras GN, Liras IN, et al. Energy Drink Effects on Hemodynamics and Endothelial Function in Young Adults. Cardiology. 2021;146(2):258-262. PubMed
  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

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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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