L-Lysine
by NOW · powder · 1 lb
- On the market (NIH)
- UPC 7 33739 00240 2
- DSLD label 314444
- Serving 552 mg (1/4 level teaspoon)
- 822 servings
L-Lysine by NOW lists 2 ingredients, 2 with an amount per serving of 552 mg, such as 435 mg of L-lysine. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2024.
What is in L-Lysine?
Each row as the label prints it, per serving of 552 mg. 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-Lysine | 435 mg | 56% of 1,250 products listing lysine give more (median 500 mg). | |
| L-Lysine Hydrochloride | 552 mg |
Source: NIH ODS Dietary Supplement Label Database, label 314444 (entered July 25, 2024), 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.
- L-LysineNature's Sunshine same ingredients
- L-Lysine 450 mgTerraVita Premium Collection same ingredients
- Lysine 400ProCaps Laboratories same ingredients
- Lysine 475 mgDr. Clark Store same ingredients
- L-Lysine 500GNC · off the market same ingredients
- L-Lysine 500 mgVitaCeutical Labs 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
- Suggested Usage: Take 1/4 level teaspoon daily.
- Warnings
- Caution: For adults only.
- Consult physician if pregnant/nursing, taking medication, or have a medical condition.
- Keep out of reach of children.
- Do not eat freshness packet enclosed.
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
- Allergens and what it does not contain
- Non-GMO
- Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients.
- Storage
- Store in a cool, dry place after opening.
- This product is sold by weight not volume.
Source: label statements in DSLD label 314444.
What else is on the label?
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Quality Assured; Triangle K (Kosher).
How many labels does L-Lysine have?
4 labels are on file under this name since December 23, 2011: other sizes, label designs and reformulations. The current one leads this page.
- Label 314444 (current) Entered July 25, 2024 · on the market · 1 lb · UPC 7 33739 00240 2
- Label 53451 Entered November 24, 2015 · on the market · 1 lb · UPC 7 33739 00240 2
- Label 13595 Entered October 1, 2012 · off the market October 23, 2015 · 1 lb · UPC 7 33739 00240 2
- Label 2829 Entered December 23, 2011 · off the market March 28, 2012 · 100 tablets · UPC 7 33739 00113 9
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names NOW FOODS (manufacturer), Bloomingdale, IL. All NOW products.