These are the top 10 tryptophan right now, ordered by how many verified reviews each has earned, 43,511 in total across the list.
How we rank it: L-Tryptophan, 500 mg, 120 Veg Capsules takes our top spot: it's the standout tryptophan in this guide, earning the lead for how consistently shoppers reach for it.
How we rank it: At #2, L-Tryptophan, 500 mg, 60 Veg Capsules earns its spot for its strong balance of quality and price.
How we rank it: L-Tryptophan, 1,000 mg, 60 Tablets lands at #3 largely for NOW Foods's reputation for quality.
How we rank it: We placed L-Tryptophan, 120 Tablets at #4 thanks to its strong balance of quality and price.
How we rank it: At #5, L-Tryptophan, 500 mg, 120 Capsules earns its spot for how consistently shoppers reach for it.
How we rank it: We placed L-Tryptophan , 500 mg, 90 Veggie Caps at #6 thanks to its strong balance of quality and price.
How we rank it: At #7, L-Tryptophan, 500 mg , 120 Capsules earns its spot for how consistently shoppers reach for it.
How we rank it: We placed Optimized Tryptophan Plus, 90 Vegetarian Capsules at #8 thanks to its strong balance of quality and price.
How we rank it: We placed L-Tryptophan, 500 mg, 90 Vegetarian Capsules at #9 thanks to its strong balance of quality and price.
How we rank it: We placed L-Tryptophan, 500 mg, 60 Capsules at #10 thanks to its strong balance of quality and price.
| # | Product | Brand | Score | Rating | Reviews | Price | |
|---|---|---|---|---|---|---|---|
| 1 | L-Tryptophan, 500 mg, 120 Veg Capsules | NOW Foods | 9.5 | 4.7 | 13,523 | $24.49 | View → |
| 2 | L-Tryptophan, 500 mg, 60 Veg Capsules | NOW Foods | 9.5 | 4.7 | 13,519 | $13.46 | View → |
| 3 | L-Tryptophan, 1,000 mg, 60 Tablets | NOW Foods | 9.3 | 4.6 | 4,549 | $19.94 | View → |
| 4 | L-Tryptophan, 120 Tablets | Source Naturals | 9.1 | 4.5 | 2,779 | $21.81 | View → |
| 5 | L-Tryptophan, 500 mg, 120 Capsules | Nutricost | 9.5 | 4.7 | 1,834 | $15.95 | View → |
| 6 | L-Tryptophan , 500 mg, 90 Veggie Caps | Doctor's Best | 9.3 | 4.6 | 1,652 | $19.99 | View → |
| 7 | L-Tryptophan, 500 mg , 120 Capsules | Source Naturals | 9.1 | 4.5 | 1,600 | $21.81 | View → |
| 8 | Optimized Tryptophan Plus, 90 Vegetarian Capsules | Life Extension | 9.5 | 4.7 | 1,564 | $24.00 | View → |
| 9 | L-Tryptophan, 500 mg, 90 Vegetarian Capsules | Life Extension | 9.5 | 4.7 | 1,557 | $24.75 | View → |
| 10 | L-Tryptophan, 500 mg, 60 Capsules | Swanson Vitamins | 9.4 | 4.7 | 934 | $13.69 | View → |
Our editorial team evaluates every product on the factors that matter most to shoppers, not just price.
We rank by verified customer reviews and rating. For added assurance, we recommend choosing products that carry independent third-party testing or certification. These organisations publish public standards and verified-product listings:
This guide is for general information only and is not medical advice. Consult a qualified professional before starting any supplement.
L-Tryptophan, 500 mg, 60 Veg Capsules is the lowest-priced pick at $13.46, with a 4.7/5 rating from 13,519 reviews.
We rank tryptophan primarily by their number of verified customer reviews, a strong signal of real-world popularity, and factor in average rating. We never accept payment for placement.
This guide compares 10 of the most-reviewed tryptophan available, ranked from most to least reviewed.
The products in this comparison were in stock at our last update (2026-10-31). Availability can change, so check the product page for current status.
Top-reviewed brands in this category include NOW Foods, Source Naturals, Nutricost, Doctor's Best and others.