L-Ornithine
by Twinlab · capsule · 100 capsules
- On the market (NIH)
- UPC 0 27434 00147 2
- DSLD label 268470
- Serving 1 capsule
- 100 servings
L-Ornithine by Twinlab lists one ingredient: 500 mg of L-ornithine per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on June 16, 2022.
What is in L-Ornithine?
Each row as the label prints it, per serving of 1 capsule. 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 |
|---|---|---|---|
| L-Ornithineas L-Ornithine Hydrochloride | 500 mg | Higher than 57% of 258 products listing ornithine (median 400 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 268470 (entered June 16, 2022), 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?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.
The NIH database records one serving 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?
6 products list the very same ingredients; the nearest amounts come first.
- Free Form Amino Acid L-Ornithine 500 mgNature's Plus same ingredients
- L-Ornithine Amino Acid 500 mgSwanson Premium Brand same ingredients
- L-Ornithine 500 mgSolgar same ingredients
- L-Ornithine 500 mgDouglas Laboratories same ingredients
- L-Ornithine 500 mgNutricost same ingredients
- L-Ornithine 500 mgSwanson same ingredients
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
- Directions: Take one capsule daily or as directed by a healthcare professional. For best results, take on an empty stomach before bedtime.
- Allergens and what it does not contain
- No tablet binders, coatings or colorings. No added flavorings, salt, artificial sweeteners, preservatives or salicylates.
- Storage
- Keep tightly closed in a cool, dry place.
Source: label statements in DSLD label 268470.
What else is on the label?
Other ingredients: Gelatin, Medium Chain Triglycerides, Magnesium Stearate, Silica.
How many labels does L-Ornithine have?
One label is on file, entered on June 16, 2022.
- Label 268470 (current) Entered June 16, 2022 · on the market · 100 capsules · UPC 0 27434 00147 2
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names ISI Brands Inc. (manufacturer), American Fork, UT. All Twinlab products.