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GNC L-Tyrosine 1000 mg supplement bottle
GNC

L-Tyrosine 1000 mg Review

What We Researched
1 active ingredient analyzed · 12 inactive ingredients decoded · 10 brand certifications checked · Page generated: Sep 2026
98
Product Score Excellent
96
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
L-Tyrosine 1000 mg †
Bioavailability Excellent

Absorption Rating

  • L-Tyrosine Good
Other Ingredients Excellent

Fillers & Additives

  • Croscarmellose Sodium
  • Povidone
  • Dicalcium Phosphate
  • Silicon Dioxide
  • Magnesium Stearate
  • Hydroxypropylcellulose
  • Stearic Acid
  • Ethylcellulose
  • Triacetin
  • Polyethylene Glycol Low
  • Oleic Acid
  • Diacetylated Monoglycerides
Efficacy Excellent

Dosage Analysis

  • L-Tyrosine 1000 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
L-Tyrosine 1000 mg †

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Povidone Generally_safe

It is used to hold ingredients together.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Hydroxypropylcellulose Generally_safe

It is added to bind ingredients together and provide a smooth coating.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Ethylcellulose Generally_safe

It is used as a coating to control the release of supplement ingredients.

Triacetin Generally_safe

It is used as a solvent or humectant.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Oleic Acid Safe
Diacetylated Monoglycerides Unknown
Brand Trust Report
GNC

Founded 1935 · Pittsburgh, Pennsylvania, USA · 1590 products · gnc.com

Certifications

10 certifications
Informed Sport Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Clean Label Project Source available Primary evidence
Labdoor Source available Primary evidence
Consumerlab Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Usda Organic Source available Primary evidence
Vegan Certified Source available Primary evidence
Nsf Gmp Source available Primary evidence
Informed Choice Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Verified Evidence available Evidence
In House Testing — Claimed Brand claim; evidence unavailable
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

34 incidents
Prop 65 Not specified on product pageOngoing Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-13 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-13 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-09 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-05 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-04-25 Source available Primary source
Lawsuit Misrepresentation of the amount of elemental magnesium in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Misrepresentation of the amount of elemental magnesium in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Mislabeled magnesium content in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Misrepresentation of magnesium content in 'Super Magnesium' supplements.2024 Source available Primary source
Recall GNC Women's Ultra Mega, Women's Ultra Mega Active, Women's Ultra Mega Energy and Metabolism, and Prenatal Formula with Iron2023-01-12 Source available Primary source
Lawsuit Falsely advertising 'Total Lean' protein bars as 'lean'.2023 Source available Primary source
Lawsuit Selling Vitamin E Skin Oil that was primarily composed of vegetable oil.2020 Source available Primary source
Lawsuit Selling Vitamin E Skin Oil that was mostly vegetable oil.2020 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 Lead and/or Cadmium2019-02-07 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 lead and/or cadmium2019-02-07 Source available Primary source
Lawsuit Deceptively labeling dietary supplements as if they have FDA approval.2019 Source available Primary source
Lawsuit Deceptively advertising fake markdowns online to mislead consumers into thinking items were on 'sale.'2019 Source available Primary source
Lawsuit Deceptively labeling dietary supplements regarding FDA approval and failing to include required disclaimers.2019 Source available Primary source
Lawsuit Using fake 'original' prices to deceive customers.2019 Source available Primary source
Recall Women's Iron Complete Dietary Supplement 60-count caplets2018-12-19 Source available Primary source
Prop 65 Lead2018-10-12 Source available Primary source
Prop 65 Lead2018-10-12 Source available Primary source
Recall Various GNC Women's Multivitamins2018-01-04 Source available Primary source
Recall GNC Women's Ultra Mega Time Release2016-11-18 Source available Primary source
Recall GNC Women's Ultra Mega Time Release 180-count2016-11-16 Source available Primary source
Lawsuit Knowingly selling products containing unlawful synthetic chemicals (picamilon, BMPEA, and acacia rigidula).2016 Source available Primary source
Lawsuit Unfair discontinuation of the Gold Card discount program.2016 Source available Primary source
Fda Warning Inclusion of unapproved dietary ingredient Beta-methylphenethylamine (BMPEA) in products.2015-04-01 Source available Primary source
Lawsuit Mislabeling of herbal supplements2015 Source available Primary source
Lawsuit Selling products containing illegal synthetic ingredients.2015 Source available Primary source
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Frequently Asked Questions
Is GNC L-Tyrosine 1000 mg a good supplement?

GNC L-Tyrosine 1000 mg received a product quality score of 98/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients Of the 12 inactive ingredients, 10 are rated safe and 1 ingredient is flagged for review. The manufacturer, GNC, holds a brand trust score of 96/100.

What are the ingredients in GNC L-Tyrosine 1000 mg?

GNC L-Tyrosine 1000 mg contains 1 active ingredients: L-Tyrosine (1000 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is GNC L-Tyrosine 1000 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for GNC L-Tyrosine 1000 mg. Of 12 inactive ingredients, 10 are rated safe. 1 ingredient is flagged for review: Polyethylene Glycol. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is GNC a trustworthy supplement brand?

GNC receives a brand trust score of 96/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1935 and headquartered in Pittsburgh, Pennsylvania, USA, the company offers 1590 products in their lineup. Note: GNC has 34 historical regulatory incidents on record, which are factored into the trust score.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.