L-Tryptophan
Scored by the Formulate Research Team · Last reviewed July 2026
Score Breakdown
Formulate scores every product across six weighted dimensions. Each dimension is graded independently — hover or tap to see what drove each component.
Ingredients per Serving
| Ingredient | Amount |
|---|---|
| Vitamin B662 systematic reviews · 142 randomised trials | 6.7 mg |
| TryptoPure L-Tryptophan | 1000 mg |
Certifications & Testing
Other Ingredients
Cellulose, Water
Recommended Use
Recommendations: As a dietary supplement, take 2 capsules, 1-3 times daily, between meals.
Warnings
Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, particularly psychiatric medication, consult your health professional before use. Do not use concurrently with antidepressants. Keep out of the reach of children. Use only if safety seal is intact. Gluten-free, Non-GMO & Hypoallergenic
Frequently Asked Questions
What is Pure Encapsulations L-Tryptophan's Formulate score?
Pure Encapsulations L-Tryptophan scores 89 out of 100 (grade A) on Formulate's ingredient-level rubric: clinical evidence, dose accuracy and bioavailability carry the score, while manufacturing, transparency and safety are checked separately and can only deduct.
Is Pure Encapsulations L-Tryptophan worth it?
Pure Encapsulations L-Tryptophan scores 89/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Pure Encapsulations L-Tryptophan?
Each serving contains Vitamin B6 (6.7 mg), TryptoPure L-Tryptophan (1000 mg). Serving size: 2 Capsule(s). 45 servings per container.
How do I take l-tryptophan?
Recommendations: As a dietary supplement, take 2 capsules, 1-3 times daily, between meals.
Who makes L-Tryptophan?
L-Tryptophan is made by Pure Encapsulations. See Formulate's full grade and product lineup for Pure Encapsulations on its brand page.
Is Pure Encapsulations L-Tryptophan third-party tested?
Pure Encapsulations lists the following certifications and testing for this product: Dairy-Free, Non-GMO, Soy-Free, Vegan, Vegetarian, cGMP Certified, Third-Party Tested, Certified Gluten-Free (GFCO).
Related Supplements
Track l-tryptophan in your stack
Build a personalized supplement stack free in your browser — no install. Flag dose overlaps and interactions, and keep every product scored against the latest evidence.
Is L-Tryptophan right for your goals?
Two questions, then every ingredient graded against what you're actually trying to do — plus what it costs per effective dose.
Build my stack2 questions · free · no account needed to start
Also on iPhone — get the free app
Evidence-based supplement guides, no spam
We send a short digest when new guides drop — nothing else. No affiliate pushes, no sponsored content, unsubscribe anytime.
Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.