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Myprotein 5-HTP supplement bottle
Myprotein

5-HTP Review

What We Researched
1 active ingredient analyzed · 4 inactive ingredients decoded · 1 brand certification checked · Page generated: Sep 2026
66
Product Score Fair
66
Brand Score Fair

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

Product Analysis

Transparency Very Poor

Supplement Facts

IngredientAmount% DV
L-5-Hydroxytryptophan (5-HTP) — —
Bioavailability Excellent

Absorption Rating

  • L-5-Hydroxytryptophan (5-HTP) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcristalline Celluluse
  • Magnesium Stearate
  • Gelatin
  • Griffonia Seed
Efficacy N/A

Dosage Analysis

Dosage data not available for assessment.

Supplement Facts

Ingredient Amount % Daily Value
L-5-Hydroxytryptophan (5-HTP)

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcristalline Celluluse Unknown
Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Griffonia Seed Unknown
Brand Trust Report
Myprotein

Founded 2004 · Manchester, United Kingdom · 99 products · us.myprotein.com/

Certifications

1 certification
Informed Choice Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Claimed Unverifiable Evidence available Evidence
Testing Lab Disclosure — Claimed Unverifiable Evidence available Evidence
In House Testing — Claimed Unverifiable Evidence available Evidence

Violation History

3 incidents
Recall Myprotein Gooey Filled Cookie - Double Chocolate & Caramel2025-05-22 Source checked Primary source
Prop 65 Lead and Cadmium2019-05-13 Source available Primary source
Lawsuit Failure to warn consumers about the presence of lead and cadmium in products, as required by California's Proposition 65.2019 Source checked Primary source
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Frequently Asked Questions
Is Myprotein 5-HTP a good supplement?

Myprotein 5-HTP received a product quality score of 66/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 1 active ingredients Of the 4 inactive ingredients, 2 are rated safe and 0 ingredients are flagged for review. The manufacturer, Myprotein, holds a brand trust score of 66/100.

What are the ingredients in Myprotein 5-HTP?

Myprotein 5-HTP contains 1 active ingredients: L-5-Hydroxytryptophan (5-HTP). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Myprotein 5-HTP safe to take?

GoodSupp reviewed the inactive-ingredient data available for Myprotein 5-HTP. 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 Myprotein a trustworthy supplement brand?

Myprotein receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2004 and headquartered in Manchester, United Kingdom, the company offers 99 products in their lineup. Note: Myprotein has 3 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.