PlainVitamins

NAC (N-Acetyl-l-Cysteine) 600 mg

by Vital Nutrients · capsule · 100 vegetarian capsules

  • On the market (NIH)
  • UPC 6 93465 10411 8
  • DSLD label 305127
  • Serving 1 to 2 vegetarian capsules; amounts per 2 vegetarian capsules
  • 50 servings

NAC (N-Acetyl-l-Cysteine) 600 mg by Vital Nutrients lists one ingredient: 1,200 mg of N-acetyl-L-cysteine per serving of 2 vegetarian capsules. Its current label entered the NIH Dietary Supplement Label Database on January 24, 2024.

What is in NAC (N-Acetyl-l-Cysteine) 600 mg?

Each row as the label prints it, per serving of 2 vegetarian 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).

NAC (N-Acetyl-l-Cysteine) 600 mg: Supplement Facts rows against the market (DSLD label 305127, January 2026 release)
IngredientAmount% DVAmong products listing it
N-Acetyl-L-Cysteine1,200 mgN-Acetyl Cysteine in NAC (N-Acetyl-l-Cysteine) 600 mg against 1,259 products1,200 mg per serving; the middle half of products list 55 mg to 500 mg, the median 150 mg.1,200 mg

Higher than 98% of 1,259 products listing N-acetyl cysteine (median 150 mg). Per day at the most servings: 2,400 mg.

Source: NIH ODS Dietary Supplement Label Database, label 305127 (entered January 24, 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?

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 1,200 mg of N-acetyl-L-cysteine (filed by NIH under N-acetyl cysteine) is higher than 98% of the 1,259 N-acetyl cysteine products that print an amount; 6 list more.

The NIH database records 1 to 2 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.

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
Recommendations: 1 or 2 capsules 1-2 times daily with food, or as directed by your healthcare professional.
Warnings
Keep out of reach of children.
Use only if safety seal is intact
Warning: If pregnant, consult your physician before taking.
Allergens and what it does not contain
Excludes coatings, binders, gluten (wheat, rye, barley), milk/dairy (casein/whey) Soy protein, egg protein, sugar. Verified by independent testing.
Storage
Store sealed in a cool dry place

Source: label statements in DSLD label 305127.

What else is on the label?

Other ingredients: Cellulose, Ascorbyl Palmitate.

How many labels does NAC (N-Acetyl-l-Cysteine) 600 mg have?

5 labels are on file under this name since March 23, 2012: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 305127 (current) Entered January 24, 2024 · on the market · 100 vegetarian capsules · UPC 6 93465 10411 8
  2. Label 208254 Entered October 23, 2019 · off the market December 7, 2022 · 100 vegetarian capsules · UPC 6 93465 10411 8
  3. Label 56886 Entered February 23, 2016 · off the market April 16, 2018 · 100 capsules · UPC 6 93465 10411 8
  4. Label 27511 Entered November 25, 2013 · off the market February 3, 2016 · 100 capsules · UPC 6 93465 10411 8
  5. Label 6692 Entered March 23, 2012 · off the market September 13, 2013 · 100 capsules · UPC 6 93465 10411 8

DSLD also links this label to: NAC 600 mg (image 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 Vital Nutrients (manufacturer), Middletown, CT. All Vital Nutrients products.

Where next?