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.
| Amount per serving | Products | For example |
|---|---|---|
| 500 mg | 64 | Sleep Soundly Advanced (GNC Preventive Nutrition); Sleep All Nite Naturals (SeniorLife Health); L-Tryptophan (PureBulk.com) |
| 100 mg | 62 | Crash Blue Razz (ProSupps); Crash Fruit Punch (ProSupps); Zinc Magnesium Amino Complex (GNC Pro Performance) |
| 50 mg | 39 | Amino 1000 (Universal); Amino Welch's Grape (GHOST); Melatonin Complex (SuperiorLabs) |
| 1,000 mg | 30 | Optimized TryptoPure Plus (Life Extension); ZZZ Razzzberry Lemonade (Core Nutritionals); L-Trytophan 1000 mg (The Vitamin Shoppe) |
| 75 mg | 27 | EAA Pure Blue Raspberry (NutraBio); EAA Pure Strawberry Lemon Bomb (NutraBio); Aminogex Ultra Watermelon (VMI Sports) |
| 250 mg | 26 | 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 mg | 21 | Intra Blast Raw Unflavored (NutraBio); Intra Blast Blueberry Lemonade (NutraBio); Leg Day New York Punch (NutraBio) |
| 60 mg | 18 | Anutra Grain (Anutra); Amino 2250 (Universal); Replenish Orange Twist (Arms Race Nutrition) |
| 20 mg | 16 | Night Time Fat Burner (HerbTonics); Essential Aminos (Pure Encapsulations); 5-HTP Plus 200 mg (Dr. Emil Nutrition) |
| 200 mg | 15 | 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).
- L-TryptophanVitamin Research Products2,000 mg
- L-Tryptophan 1,000 mgSource Naturals2,000 mg
- L-TryptophanKlaire Labs2,000 mg
- 100% Whey Protein ApfelstrudelBody Attack Sports Nutrition1,940 mg
- Matrix 1.0 Milk ChocolateSyntrax1,900 mg
- Ultra-Pro VanillaDouglas Laboratories1,675 mg
- Ultra-Pro CarobDouglas Laboratories1,675 mg
- L-TryptophanSource Naturals1,500 mg
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.
| Year | Products | Median per serving |
|---|---|---|
| 2012 | 32 | 180 mg |
| 2013 | 39 | 215 mg |
| 2014 | 26 | 367 mg |
| 2015 | 22 | 100 mg |
| 2017 | 29 | 250 mg |
| 2018 | 23 | 500 mg |
| 2020 | 62 | 100 mg |
| 2021 | 65 | 96.5 mg |
| 2022 | 63 | 106 mg |
| 2023 | 50 | 150 mg |
| 2024 | 73 | 100 mg |
| 2025 | 70 | 75 mg |
Source: DSLD label entry dates and amounts, current labels.
In which products and brands?
Products listing tryptophan by DSLD product type
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 10 of 19), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.
- L-Tryptophan 500 mgNatural Grocers by Vitamin Cottage500 mg
- L-Tryptophan 500 mgBronson Laboratories500 mg
- L-Tryptophan 500 mgVitalBulk500 mg
- L-Tryptophan 500 mgAdvanced Nutrition by Zahler500 mg
- L-Tryptophan 500 mgDC1,000 mg
- L-Tryptophan 500 mgBest Naturals500 mg
- L-Tryptophan 500 mgMetabolic Maintenance500 mg
- L-Tryptophan 500 mgLuckyVitamin1,000 mg
- L-Tryptophan 500 mgSource Naturals1,500 mg
- L-Tryptophan 500 mgDoctor's Best500 mg
- L-Tryptophan 500 mgNutricost500 mg
- L-Tryptophan 500 mgJarrow Formulas500 mg
- L-Tryptophan 500 mglonglifenutri500 mg
- L-Tryptophan 500 mgNOW1,000 mg
- L-Tryptophan 500 mgAN Amazing Nutrition Amazing Formulas500 mg
- L-Tryptophan 500 mgBluebonnet500 mg
- L-Tryptophan 500 mgSwanson500 mg
- L-Tryptophan 500 mgLife Extension500 mg
- L-Tryptophan 500 mgProtocol For Life Balance1,000 mg
- L-Tryptophan 500 mg CapsulesBulkSupplements.com500 mg
- L-Tryptophan 500 MilligramsMontiff500 mg
- L-Tryptophan Chewable Delicious Green Apple FlavorLidtke100 mg
- L-Tryptophan Chewable Delicious Maple Vanilla FlavorLidtke100 mg
- L-Tryptophan CompleteLidtke TryptoGOLD1,050 mg
- L-Tryptophan Extra Strength 1500 mgBRI Nutrition1,500 mg
- L-Tryptophan PeptideJarrow Formulas · off the market1,350 mg
- L-Tryptophan PowderNOW950 mg
- L-Tryptophan PowderHerbadiet1,000 mg
- L-Tryptophan, USPLidtke · off the market500 mg
- L-Tryptophan, USPLidtke TryptoGOLD500 mg
- L-Trytophan 1000 mgThe Vitamin Shoppe1,000 mg
- Last ThingBeachbody75 mg
- LBA PRO Chocolate SyrupAll American EFX0.086 mg
- LBA PRO Vanilla GlazeAll American EFX0.086 mg
- LeanFire PMForce Factorin a blend
- Leanology ChocolateTriVita316 mg
- Leg Day Blueberry LemonadeNutraBio · off the market55 mg
- Leg Day Cherry LimeadeNutraBio55 mg
- Leg Day Grape Berry CrushNutraBio55 mg
- Leg Day New York PunchNutraBio55 mg
- Leg Day Passion Fruit PineappleNutraBio55 mg
- Leg Day Peachy Glutes Peach MangoNutraBio55 mg
- Leg Day Sweet TeaNutraBio55 mg
- Light Yellow Oval Tablet Amino AcidBronson · off the market9 mg
- Lipo Burn SlimmingFit Body Weight Lossin a blend
- Liquid Advanced Amino AcidsCalifornia Academy of Health2 mg
- Liquid Amino AcidsWonder Laboratories6 mg
- LuminiteLumiday · off the market220 mg
- Luminite Sleep SupportLuminite200 mg
- MacroMeal Chocolate Protein + SuperfoodsMacroLife Naturals · off the market340 mg