N-Acetyl-L-Cysteine NAC
by PCOS Nutrition Center · capsule · 120 vegetarian capsules
- On the market (NIH)
- DSLD label 274550
- Serving 1 capsule
- 120 servings
N-Acetyl-L-Cysteine NAC by PCOS Nutrition Center lists one ingredient: 900 mg of N-acetyl-L-cysteine per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2022.
What is in N-Acetyl-L-Cysteine NAC?
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 |
|---|---|---|---|
| N-Acetyl-L-Cysteine | 900 mg | Higher than 95% of 1,259 products listing N-acetyl cysteine (median 150 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 274550 (entered November 22, 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?
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 900 mg of N-acetyl-L-cysteine (filed by NIH under N-acetyl cysteine) is higher than 95% of the 1,259 N-acetyl cysteine products that print an amount; 50 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.
- N-Acetyl-CysteineDesigns for Health same ingredients
- NACAdaptogen Research same ingredients
- N-Acetyl-L-Cysteine 900 mgDouglas Laboratories same ingredients
- NAC 900 mgPure Encapsulations same ingredients
- NAC 880 mgFresh Nutrition same ingredients
- NACLiveLong · off the market 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
- Recommended Use: As a dietary supplement, take one capsule per day, or as directed by your health care practitioner.
- Warnings
- Keep out of reach of children.
- Allergens and what it does not contain
- Made with Non-GMO ingredients Does not contain gluten
- Storage
- Store at room temperature.
Source: label statements in DSLD label 274550.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Stearates.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Guaranteed GMP Compliant Products.
How many labels does N-Acetyl-L-Cysteine NAC have?
One label is on file, entered on November 22, 2022.
- Label 274550 (current) Entered November 22, 2022 · on the market · 120 vegetarian capsules
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names PCOS Nutrition Center, LLC (distributor), Bryn Mawr, PA. All PCOS Nutrition Center products.