N-Acetyl-L-Cysteine
by Karuna · capsule · 180 vegetarian capsules
- On the market (NIH)
- DSLD label 24762
- Serving 2 to 6 capsules; amounts per 2 capsules
- 90 servings
N-Acetyl-L-Cysteine by Karuna lists one ingredient: 1,000 mg of N-acetyl-L-cysteine per serving of 2 capsules. Its current label entered the NIH Dietary Supplement Label Database on August 23, 2013.
What is in N-Acetyl-L-Cysteine?
Each row as the label prints it, per serving of 2 capsules. 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 | 1,000 mg | Higher than 96% of 1,259 products listing N-acetyl cysteine (median 150 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 24762 (entered August 23, 2013), 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?
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 1,000 mg of N-acetyl-L-cysteine (filed by NIH under N-acetyl cysteine) is higher than 96% of the 1,259 N-acetyl cysteine products that print an amount; 25 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.
- NACLiveLong · off the market same ingredients
- N-Acetyl Cysteine 500 mgBIOVEA same ingredients
- N-Acetyl Cysteine 1000 mgDouble Wood Supplements same ingredients
- NAC 1,000 mgLuckyVitamin same ingredients
- NAC N-Acetyl-Cysteine 1000 mgProtocol For Life Balance same ingredients
- NAC 1,000 mgHealthy Origins 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 use for adults: 2-6 capsules per day in divided doses between meals, or as directed by your health care practitioner.
- Allergens and what it does not contain
- This product contains no yeast, wheat, soy, corn, milk, salt, sugar, artificial coloring, preservatives or flavoring.
- Storage
- Keep in a cool, dry place, tightly capped.
Source: label statements in DSLD label 24762.
What else is on the label?
Other ingredients: Rice Flour.
Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): KARUNA(R) RESPONSIBLE NUTRITION(TM).
How many labels does N-Acetyl-L-Cysteine have?
One label is on file, entered on August 23, 2013.
- Label 24762 (current) Entered August 23, 2013 · on the market · 180 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 Karuna Corporation (manufacturer), Novato, CA. All Karuna products.