PlainVitamins

amino acid

Tryptophan supplements

Half of the 605 tryptophan supplements in the NIH label database that print an amount list 123 mg or less per serving; the middle half list 55 mg to 471 mg (DSLD version 9.4.0, January 2026). The 58 products whose only supplement ingredient is tryptophan list a median of 500 mg.

Products listing it
945605 print an amount; 332 list it inside a blend without an amount
Median per serving
123 mgmiddle half 55 mg to 471 mg

How much tryptophan do supplements contain?

The median product lists 123 mg per serving. One in ten lists 20 mg or less, one in ten 628.4 mg or more. The amount printed most often is 500 mg (64 products).

Products by amount of tryptophan per serving

605 products, log scale; extreme 0.2% at each end left out of the drawing.

Tryptophan: products by amount per serving0.3 mg3 mg30 mg300 mg
Tryptophan: products by amount per serving0.3 mg1 mg3 mg10 mg100 mg1,000 mg
Tryptophan: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg1,000 mg
Tryptophan: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
Tryptophan: products by amount per serving0.3 mg1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
500 mg64 Sleep Soundly Advanced (GNC Preventive Nutrition); Sleep All Nite Naturals (SeniorLife Health); L-Tryptophan (PureBulk.com)
100 mg62 Crash Blue Razz (ProSupps); Crash Fruit Punch (ProSupps); Zinc Magnesium Amino Complex (GNC Pro Performance)
50 mg39 Amino 1000 (Universal); Amino Welch's Grape (GHOST); Melatonin Complex (SuperiorLabs)
1,000 mg30 Optimized TryptoPure Plus (Life Extension); ZZZ Razzzberry Lemonade (Core Nutritionals); L-Trytophan 1000 mg (The Vitamin Shoppe)
75 mg27 EAA Pure Blue Raspberry (NutraBio); EAA Pure Strawberry Lemon Bomb (NutraBio); Aminogex Ultra Watermelon (VMI Sports)
250 mg26 GH Stack Grape Flavor (Universal); Women's Advanced Protein Cinnamon Bun (GNC Pro Performance AMP); Women's Advanced Protein Chocolate Cupcake (GNC Pro Performance AMP)
55 mg21 Intra Blast Raw Unflavored (NutraBio); Intra Blast Blueberry Lemonade (NutraBio); Leg Day New York Punch (NutraBio)
60 mg18 Anutra Grain (Anutra); Amino 2250 (Universal); Replenish Orange Twist (Arms Race Nutrition)
20 mg16 Night Time Fat Burner (HerbTonics); Essential Aminos (Pure Encapsulations); 5-HTP Plus 200 mg (Dr. Emil Nutrition)
200 mg15 Night Pack: New Mood (Onnit); GI Guard PM (Protocol For Life Balance); Raw Organic 100% Plant-Based Protein Very Berry (Natural Factors)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most tryptophan?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2012 list a median of 180 mg; those entered in 2025, 75 mg.

Median tryptophan per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201232180 mg
201339215 mg
201426367 mg
201522100 mg
201729250 mg
201823500 mg
202062100 mg
20216596.5 mg
202263106 mg
202350150 mg
202473100 mg
20257075 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing tryptophan by DSLD product type

Tryptophan by product typeOther Combinations424Amino acid/Protein165Botanical with Nutrients15Vitamin1
Tryptophan by product typeOther Combinations424Amino acid/Protein165Botanical with Nutrients15Vitamin1
Tryptophan by product typeOther Combinations424Amino acid/Protein165Botanical with Nutrients15Vitamin1
Tryptophan by product typeOther Combinations424Amino acid/Protein165Botanical with Nutrients15Vitamin1
Tryptophan by product typeOther Combinations424Amino acid/Protein165Botanical with Nutrients15Vitamin1

Brands listing it most: NutraBio (38), Douglas Laboratories (19), Axe & Sledge Supplements (15), Arms Race Nutrition (12), GNC Beyond Raw (11), Muscle Feast (11), Metabolic Nutrition (10), GHOST (9), Bronson (8), Universal (8).

Every product listing tryptophan

945 products, A to Z by name (page 18 of 19), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

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