L-Tryptophan Extra Strength 1500 mg
by BRI Nutrition · capsule · 120 capsules
- On the market (NIH)
- UPC X001F6PNP1
- DSLD label 326532
- Serving 1 capsule; amounts per 3 capsules
- 40 servings
L-Tryptophan Extra Strength 1500 mg by BRI Nutrition lists 2 ingredients, 2 with an amount per serving of 3 capsules, such as 575 mcg of iron and 1.5 g of L-tryptophan. Its current label entered the NIH Dietary Supplement Label Database on March 25, 2025.
What is in L-Tryptophan Extra Strength 1500 mg?
Each row as the label prints it, per serving of 3 capsules. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Ironnaturally occurring | 575 mcg | 3% | 89% of 6,910 products listing iron give more (median 5 mg). Per day at the most servings: 1.73 mg. |
| L-Tryptophan | 1.5 g | Higher than 98% of 605 products listing tryptophan (median 123 mg). Per day at the most servings: 4,500 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 326532 (entered March 25, 2025), version 9.4.0. See the label on DSLD or its label image (PDF). Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.
Is that a lot?
The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:
- Its 1,500 mg of L-tryptophan (filed by NIH under tryptophan) is higher than 98% of the 605 tryptophan products that print an amount; 8 list more.
The NIH database records 3 servings a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.
The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.
Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.
Which products have the closest formulas?
2 products list the very same ingredients; the nearest amounts come first.
- L-TryptophanSource Naturals same ingredients
- L-TryptophanBRI Nutrition · off the market same ingredients
- L-Tryptophan 1000 mgNOW · off the market 1 shared, 65% alike
- L-TryptophanThorne Research · off the market 1 shared, 65% alike
- L-TryptophanPureBulk.com 1 shared, 65% alike
- Best L-Tryptophan PowderDoctor's Best 1 shared, 65% alike
Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.
What does the label say about taking it?
Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.
- Directions
- Suggested use: 1 capsult three times daily between meals and preferably with fruit juice or, to support restful sleep, take 3 capsules before bed.
- Warnings
- Warning: If you are pregnant, may become pregnant, breastfeeding, or are taking medications such as SSRIs or MAOIs, consult your health care professional before using this product.
- Allergens and what it does not contain
- Contains no yeast, dairy, egg, gluten, corn, soy or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.
- Storage
- Store in a cool, dry place.
Source: label statements in DSLD label 326532.
What else is on the label?
Other ingredients: Gelatin, Magnesium Stearate.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Sourced from a GMP Certified Facility Good Manufacturing Practice Quality Assured Made in USA.
How many labels does L-Tryptophan Extra Strength 1500 mg have?
One label is on file, entered on March 25, 2025.
- Label 326532 (current) Entered March 25, 2025 · on the market · 120 capsules · UPC X001F6PNP1
DSLD also links this label to: L-Tryptophan (image difference, same product).
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names BRI Nutrition LLC (distributor), New York, NY. All BRI Nutrition products.