L-Histidiine 600 mg
by NOW · capsule · 60 veg capsules
- On the market (NIH)
- UPC 7 33739 00121 4
- DSLD label 292049
- Serving 1 veg capsule
- 60 servings
L-Histidiine 600 mg by NOW lists 2 ingredients, 2 with an amount per serving of 1 veg capsule, such as 600 mg of L-histidine. Its current label entered the NIH Dietary Supplement Label Database on June 22, 2023.
What is in L-Histidiine 600 mg?
Each row as the label prints it, per serving of 1 veg 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-Histidine | 600 mg | Higher than 94% of 591 products listing histidine (median 125 mg). | |
| L-Histidine HCl | 833 mg |
Source: NIH ODS Dietary Supplement Label Database, label 292049 (entered June 22, 2023), 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 600 mg of L-histidine (filed by NIH under histidine) is higher than 94% of the 591 histidine products that print an amount; 32 list more.
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-Histidine 600 MilligramsMontiff same ingredients
- 100% Pure L-HistidineNutraBio same ingredients
- 100% Pure L-Histidine 500 MilligramsNutraBio same ingredients
- Pharmaceutical Grade AjiPure L-Histidine 500 mgSwanson Ultra same ingredients
- L-Histidine 500 mgDouglas Laboratories same ingredients
- L-Histidine BaseBulkSupplements.com 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 capsule daily with or without food.
- Warnings
- Caution: For adults only.
- Consult physician if pregnant/nursing, taking medication (especially anticoagulant and anti-platelet drugs), have a medical condition (especially bleeding disorders), or if planning to have surgery.
- Keep out of reach of children.
- 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.
Source: label statements in DSLD label 292049.
What else is on the label?
Other ingredients: Hypromellose, Microcrystalline Cellulose, Stearic Acid, Silicon Dioxide.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Quality Assured.
How many labels does L-Histidiine 600 mg have?
One label is on file, entered on June 22, 2023.
- Label 292049 (current) Entered June 22, 2023 · on the market · 60 veg capsules · UPC 7 33739 00121 4
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.