NAC
by Carlson · capsule · 60 capsules
- Off the market since May 2019 (NIH)
- UPC 0 88395 06770 9
- DSLD label 54830
- Serving 1 capsule
NAC by Carlson lists one ingredient: 500 mg of N-acetyl cysteine per serving of 1 capsule. Its current label entered the NIH Dietary Supplement Label Database on December 23, 2015.
What is in 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 Cysteine | 500 mg | Higher than 74% of 1,259 products listing N-acetyl cysteine (median 150 mg). Per day at the most servings: 1,500 mg. |
Source: NIH ODS Dietary Supplement Label Database, label 54830 (entered December 23, 2015), version 9.4.0. See the label on DSLD. 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 1 to 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?
6 products list the very same ingredients; the nearest amounts come first.
- N-Acetyl-L Cysteine 500 mgNatural Factors · off the market same ingredients
- N-AcetylcysteineDouglas Laboratories same ingredients
- CysteplusThorne Research · off the market same ingredients
- NACAllergy Research Group · off the market same ingredients
- NACBiotics Research Corporation same ingredients
- Resbid N-Acetyl-L-Cysteine (Timed Release)Ecological Formulas 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 one to three times daily.
- Allergens and what it does not contain
- Gluten-free Milk/Casein-free Preservative-free
- Storage
- Keep bottle tightly closed. Store away from heat and moisture.
Source: label statements in DSLD label 54830.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Magnesium Stearate, Beef Gelatin Capsule.
How many labels does NAC have?
One label is on file, entered on December 23, 2015.
- Label 54830 (current) Entered December 23, 2015 · off the market May 16, 2019 · 60 capsules · UPC 0 88395 06770 9
DSLD also links this label to: N-A-C 500 mg (image difference, same product), N-A-C 500 mg (package size difference, same product), N-A-C 500 mg (image difference, same product), N-A-C 500 mg (package size difference, same product), N-A-C 500 mg (image difference, same product), N-A-C 500 mg (package size 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 Carlson Division of J.R. Carlson Laboratories, Inc. (distributor), Arlington Hts., IL. All Carlson products.