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Dietary supplement

Tyrosine Powder Ingredients & Drug Interactions

by CHK Nutrition

Tyrosine Powder label
See full label image
Powder Category: Amino Acid/protein
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Tyrosine Powder against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Tyrosine Powder is a dietary supplement by CHK Nutrition with 1 active ingredient. Its ingredients are commonly taken for mental focus and alertness, coping with stress, fatigue and sleep loss.Based on those ingredients, 21 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are L-Tyrosine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Tyrosine Powder by CHK Nutrition

Ask about any prescription or over-the-counter medication and we check it for interactions with Tyrosine Powder by CHK Nutrition — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Tyrosine Powder by CHK 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

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 11, 2026

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 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product is pure L-tyrosine, an amino acid your body naturally makes and uses to build proteins and thyroid and brain chemicals. There's one active ingredient and no inactive fillers or other ingredients listed.

Does it work?

Strong 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

This product doesn't appear to be marketed for a specific use, so we graded Tyrosine's overall clinical evidence instead.

Strong

Strong clinical evidence supports Tyrosine for:

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Phenylketonuria (PKU) — rated "Effective" (Natural Medicines).
  • On file: Cognitive function — rated "Possibly Effective" (Natural Medicines).
  • On file: Memory — rated "Possibly Effective" (Natural Medicines).

Tyrosine is effective for phenylketonuria (PKU), a rare genetic condition. For cognitive function and memory, the evidence suggests it may help, though it's not definitive.

For athletic performance, the evidence doesn't support its use. For alcohol use disorder and dementia, we don't have enough reliable evidence to say whether it works.

The evidence, ingredient by ingredient Tyrosine

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 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

L-tyrosine is generally well tolerated in healthy adults, but you should talk to your healthcare provider before taking it regularly. The most common side effects from clinical use are fatigue, headache, heartburn, and nausea.

Larger doses tend to bring on more headache and fatigue; if you experience these, lowering your dose often helps. There isn't enough safety data during pregnancy or breastfeeding, so talk with your doctor or pharmacist before using it if you're pregnant or nursing.

Side effects, ingredient by ingredient Tyrosine

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Tyrosine.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: Parkinson's medications.
  • For scale: 21 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 with your pharmacist before taking this if you're on levodopa (a Parkinson's medication) — tyrosine may reduce how well it works, and you'll need to space your doses at least 2 hours apart. Also double-check if you take any thyroid hormone medication, where tyrosine could intensify its effects.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with strong clinical evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

This supplement is straightforward — one ingredient, well tolerated by most people, and proven effective for PKU. If you take levodopa for Parkinson's or thyroid medication, check with us first and space your doses apart.

If you're pregnant, nursing, or unsure about your medications, talk to your pharmacist before starting.

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

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Aug 23, 2021.

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 Tyrosine Powder, straight from the product label.

Brand CHK Nutrition
Net contents 1.0625 lb(s); 500 Gram(s)
Market status On market
Date entered into DSLD Aug 23, 2021
DSLD ID 252917
Product type Amino Acid/protein
Supplement form Powder
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), 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 Tyrosine Powder by CHK 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:
2.5 Gram(s)
Maximum serving Sizes:
2.5 Gram(s)
Servings per container
200
IngredientAmount% DV
L-Tyrosine2.5 Gram(s)--

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.
Suggested/Recommended/Usage/Directions

Directions: Take as directed by your health care provider. Use only under medical supervision.

Use of CysReplete is recommended with this product to prevent sulfur amino acid depletion.

Precautions

If you are pregnant or nursing consult your health care practitioner before use.

Keep away from children.

Brand IP Statement(s)

US Patents 6660777, 6384088, 6403657, 6548551, 6759437, 7268161, 7547723 with US and International PCT Patents Pending.

General Statements

This product is intended for resale.

Storage

Keep away from direct sunlight.

FDA Disclaimer Statement

These statements have not been evaluated by the United States Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease.

Formula

Naturally sourced Tyrosine

FDA Statement of Identity

Dietary Supplement

Formulation

Does not contain wheat, corn, soy, sucrose, salt, starch, yeast, artificial flavors, artificial colorings, or other known allergens.

1 level teaspoon (tsp.) is approximately equal to the Tyrosine in 5 TyrosineReplete capsules. 1 level tablespoon (tbsp.) is approximately equal to the Tyrosine in 16 TyrosineReplete capsules

Weighing provides the most accurate dosing measurement (due to settling). Settling occurs naturally with powders and may cause variations in the powder density. Consistent doses can be obtained by weighing with a scale rather than measuring with a teaspoon or tablespoon.

This product is manufactured in a cGMP certified facility.

GF Gluten-free

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Tyrosine Powder by CHK Nutrition label

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

Tyrosine Powder label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Tyrosine Powder by CHK Nutrition

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size2.5 Gram(s) Dosage formPowder Servings per container200 Amounts shown are per serving.

L-Tyrosine

Interacts with
21 drugs
2.5 Gram(s) per serving

L-tyrosine is an amino acid your body uses to make brain chemicals like dopamine and norepinephrine. Some studies suggest it may help mental performan...

L-Tyrosine monograph & interactions
Interaction report

Tyrosine Powder by CHK Nutrition Drug Interactions

Want to check YOUR meds against Tyrosine Powder?

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
21Drugs
21 Moderate

Ingredients driving the most interactions

L-Tyrosine 21

Individual Drug Interactions

The ingredients in Tyrosine Powder interact with 21 drugs. Click any drug to see the details.

1 of the 1 ingredient in Tyrosine Powder interact with drugs. Each result below shows which ingredient is responsible. L-Tyrosine

Each ingredient & the kinds of drugs it affects

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

L-Tyrosine2 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-Tyrosine full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Tyrosine Powder, from the product label.

CHK Nutrition

See all CHK Nutrition products
Name
CHK Nutrition
Street Address
3930 E Calvary Rd
City
Duluth
State
MN
ZipCode
55803
Phone Number
1-877-538-8388
Web Address
www.CHKnutrition.com
Pharmacist Counseling Corner

Tyrosine Powder by CHK Nutrition: Common Questions

Does Tyrosine Powder by CHK Nutrition interact with any medications?
Yes. Based on its ingredients, Tyrosine Powder has a known interaction with 21 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Tyrosine Powder contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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 is L-tyrosine, and what does it do?
L-tyrosine is an amino acid — a building block your body uses to make proteins and brain chemicals like dopamine and norepinephrine, as well as thyroid hormones. Your body makes it on its own, but this supplement provides extra.
Will tyrosine actually help my memory or focus?
The evidence suggests it may help cognitive function and memory, but it's not definitive — we'd call it possibly effective rather than proven. Results can vary from person to person.
What are the side effects?
Most people tolerate it well. The most common side effects are fatigue, headache, heartburn, and nausea. At higher doses, headache and fatigue are more likely, but lowering your dose usually resolves them.
Is it safe to take while pregnant or breastfeeding?
There isn't enough safety data for pregnancy or breastfeeding. Talk with your doctor or pharmacist before taking it if you're pregnant or nursing — they can weigh the pros and cons for your situation.
Can I take this with my other medications?
Some medications do interact with tyrosine, especially levodopa (Parkinson's) and thyroid hormones. Use the medication checker on this page with your exact medications, and talk to your pharmacist if you have any questions.

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

Not sure if Tyrosine Powder 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.

Tyrosine Powder label
Go deeper

The Full Monographs Behind Tyrosine Powder’s Ingredients

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

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 →
Sources

Sources & How We Checked

Tyrosine Powder'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 4 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.

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

See these in context on the Tyrosine monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

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.

© 2021 Therapeutic Research Center, LLC

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