L-Tryptophan 500 mg®
Amino Acids & ProteinBrand: Swanson Ultra
Functions
Net Contents
90 Veggie Cap(s)
Serving Size
1 Veggie Capsule(s)
Servings Per Container
Not specified
Supplement Form
Capsule
Bar Code (UPC/SKU)
0 87614 02372 4
Product Version
SWU372 Rev 0 01 25 18
Label Analysis
Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.
Single-ingredient formula listed in Supplement Facts.
Every active ingredient discloses a specific amount per serving.
Label states: Vegetarian.
This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.
Supplement Facts
Serving Size: 1 Veggie Capsule(s) · 1 per day
| Ingredient | Amount Per Serving | |
|---|---|---|
| Ajinomoto TryptoPure L-Tryptophan(L-Tryptophan) | 500 mg | — |
Not Present
Other Ingredients
Target Groups
Label Claims
Directions & Suggested Use
Suggested/Recommended/Usage/Directions
Suggested Use: As a dietary supplement, take one veggie capsule with water 30–60 minutes before sleeping. For maximum benefit, take two veggie capsules.
Warnings & Precautions
Precautions re: All Other
Do not use if seal is broken.
Precautions re: Children
Keep out of reach of children.
Precautions re: Pregnant or Nursing or Prescription Medications
Warning: Do not take this product if you are taking a prescription antidepressant or if you are pregnant or nursing. Consult your healthcare provider before use if you have a medical condition or if you are taking any prescription medications.
Storage
Storage
Store in a cool, dry place.
Formulation
Formula re: Contains
TryptoPure
Formulation re: Vegetarian/Vegan
Vegetarian Source
FDA Statements
FDA Statement of Identity
Dietary Supplement
Other Label Statements
General Statements: All Other Content
The Most Advanced Nutrition Technology 100% Pure Pharmaceutical Grade
Seals/Symbols
V Vegetarian formula Guaranteed purity & potency
General Statements: All Other Content
To reorder, call toll free 1-800-437-4148 or visit our website at www.swansonvitamins.com
Brand IP Statement(s) re: (c), (TM), (SM)
AjiPure and TryptoPure are registered trademarks of Ajinomoto Co., Inc.
Seals/Symbols
AjiPure Amino Acids
General: Product/Version Code
SWU372 Rev 0 01 25 18
Manufacturer & Distributor
Distributor
Swanson Health Products
Fargo, ND, 58104, USA
1-800-437-4148
Where to Buy Locally
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Vitaminplus
4.9 (227)Vitamin & supplements store
Falknisstrasse 21, 7320 Sargans, Switzerland
Biofitus
4.9 (2739)Vitamin & supplements store
Rygos g. 54 Vilnius, 05202 Lithuania
HealthAid
4.1 (35)Vitamin & supplements store
HealthAid House, Marlborough Hill, Harrow HA1 1UX, United Kingdom
Proteinbuilder.hu
4.8 (131)Vitamin & supplements store
Dunakeszi, Fóti út 120-Tesco üzletsor, 2120 Hungary
fithealthy.eu
4.6 (54)Vitamin & supplements store
Kārļa Mīlenbaha iela 5, Latgales priekšpilsēta, Rīga, LV-1050, Latvia
Buxtrade GmbH
4.7 (105)Vitamin & supplements store
Carl-Zeiss-Straße 32b, 21614 Buxtehude, Germany
Біовіт: Вітаміни з США та Європи
4.8 (954)Vitamin & supplements store
Spaska St, 9а, Of. 207, Kyiv, Ukraine, 02000
Sanaponte GmbH
4.9 (225)Vitamin & supplements store
Gewerbepark Bwb 26, 83052 Bruckmühl-Heufeldmühle, Germany
Research & Studies
Gut bacteria-derived 5-hydroxyindole is a potent stimulant of intestinal motility via its action on L-type calcium channels
B Waclawiková, A Bullock, M Schwalbe… - PLoS …, 2021 - journals.plos.org
… of L-tryptophan via … to 500 times higher than the concentration employed in the present study (100 μM), which was based on the 5-HI levels detected in the fecal samples from healthy …
202166 citationsA systematic review of the effect of L-tryptophan supplementation on mood and emotional functioning
AM Kikuchi, A Tanabe, Y Iwahori - Journal of dietary supplements, 2021 - Taylor & Francis
… This systematic review includes 11 RCTs that examined the effects of TRP intake on positive and negative mood in healthy adult populations. We have targeted healthy adult men and …
2021109 citationsSupplementing healthy women with up to 5.0 g/d of L-tryptophan has no adverse effects
C Hiratsuka, T Fukuwatari, M Sano, K Saito… - The Journal of …, 2013 - academic.oup.com
… intake of the essential amino acid L-tryptophan (L-Trp) have … Indeed, pellagra remains a public health problem in many … the nutritional requirements for L-Trp (300 mg/d in adults) (12) …
201379 citationsAnalysis, nutrition, and health benefits of tryptophan
M Friedman - International Journal of Tryptophan Research, 2018 - journals.sagepub.com
… Here, tryptophan refers to l-tryptophan and the isomeric form produced during food … in the absence of l-tryptophan; ie, the mice must meet the entire need for l-tryptophan from the d-…
2018402 citationsA conspectus of research on amino acid requirements of man
MI Irwin, DM Hegsted - The Journal of Nutrition, 1971 - Elsevier
… (21) confirmed this observation in a study with three healthy men but re ported that, with … 225 mg L-tryptophan/day or less. About twice as much DL-tryptophan as L-tryptophan was …
1971190 citations… in the plasma tryptophan-to-large-neutral-amino-acids ratio attenuates the effects of L-tryptophan on gut hormones and energy intake in healthy males: a randomized …
J Anjom-Shoae, M Hajishafiee, PCE Fitzgerald… - The American journal of …, 2025 - Elsevier
Background L-tryptophan (“Trp”) and L-leucine (“Leu”), when administered intraduodenally, increase plasma cholecystokinin (CCK) and glucagon-like peptide 1 (GLP-1) and stimulate …
20253 citations
Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2018-11-21. DSLD Label ID: 180725. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.
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