NOW · Amino acid/Protein supplement
NAC 1000 mg
5 ingredients on file in the NIH Dietary Supplement Label Database, top 75% by ingredient count. Off-market, label data preserved for reference.
- 5
- Ingredients
- Top 75%
- By ingredient count
- 5
- Nutrient categories
NAC 1000 mg is a amino acid/protein supplement by NOW in tablet or pill form, listing 5 ingredients in the NIH Dietary Supplement Label Database (DSLD), maintained by the Office of Dietary Supplements at the National Institutes of Health. Currently listed as off-market (no longer available for purchase, but label data is preserved). Daily Value percentages shown below are based on FDA reference daily intake amounts for adults.
Product Details
- Type
- 🧬 Amino acid/Protein
- Form
- Tablet or Pill
- Database Entry Date
- 2014-08-26
- Ingredients
- 5
Supplement Facts (5 Ingredients)
How does NAC 1000 mg compare?
Ingredients listed on each label, against the amino acid/protein category average of 12.7. Data from the NIH DSLD.
NAC 1000 mg lists 15 ingredients fewer than 1 Up Whey Chocolate & Peanut Butter Blast. That is 8 below the amino acid/protein average.
What the Label Data Shows
According to NIH DSLD label rows, NAC 1000 mg sits in the top 75% of products with a countable formula by declared ingredient count.
NAC 1000 mg is a compact, 5-ingredient amino acid/protein supplement from NOW, sold in tablet or pill form, cataloged in the NIH Dietary Supplement Label Database (DSLD). These ingredients span 5 nutrient categories, non-nutrient/non-botanical, fiber, fatty acid, mineral, and 1 more, reflecting a multi-component formula rather than a single-nutrient product.
With only 5 ingredients on the label, 5 of 5 lack a reported percentage Daily Value in the source record, so their regulatory reference status remains unspecified here.
A product's market status is worth checking before relying on this label. This product is currently listed as off-market in the DSLD, with its label first entered into the database on 2014-08-26. Off-market products are no longer being produced or distributed under this label, but the DSLD preserves their historical label data for researchers, consumers checking older bottles, and for tracking how formulations have evolved.
About the DSLD database
The DSLD is a label database, not an FDA approval list, under the 1994 DSHEA framework, dietary supplements do not require pre-market approval, and label information reflects what manufacturers self-declare rather than independent laboratory verification. This page presents factual label data for reference only and is not medical advice; consult a licensed healthcare provider before making decisions about any supplement.
Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD) Supplement label data for NAC 1000 mg: ingredients, % Daily Value, market status, brand · 2026 DSLD captures manufacturer-self-declared label information; the NIH does not verify accuracy or evaluate safety/efficacy. Dietary supplements are regulated under DSHEA 1994, no pre-market FDA approval is required.
Nationwide supplements with similar label profiles
Two DSLD-derived peer sets for NAC 1000 mg, both outside the NOW brand so the neighborhoods are not catalog containment (the same-type Nearby block above stays type-local).
Similar ingredient count
Nearest cross-brand formulas by declared ingredient count (5 here).
Similar Tablet or Pill peers
Nearest same-form formulas from other brands.
Ingredient Breakdown by Category
Daily Value Coverage
Frequently Asked Questions
What ingredients are in NAC 1000 mg? ▼
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Is NAC 1000 mg still available for purchase? ▼
What is the serving size of NAC 1000 mg? ▼
What type of supplement is NAC 1000 mg? ▼
Data Sources & Methodology
Data as of 2025. Source: NIH Office of Dietary Supplements, Dietary Supplement Label Database (DSLD).
Supplement label data sourced from the Source: NIH Dietary Supplement Label Database (DSLD), maintained by the Office of Dietary Supplements at the National Institutes of Health. The DSLD contains label information from dietary supplement products marketed in the United States.
Daily Value (DV) percentages are based on Source: FDA 21 CFR 101.9 Reference Daily Intake (RDI) values for adults. Products marked "Off Market" may no longer be available for purchase but their label data remains in the database for reference.
Disclaimer, Not Medical Advice
Label data from the Source: NIH Dietary Supplement Label Database (DSLD). This information is for educational and reference purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting, stopping, or combining any dietary supplement, especially if you are pregnant, nursing, take prescription medication, or have a medical condition.
Read our methodology , how this data is sourced, computed, and verified.
Every figure on PlainVitamins is rendered directly from the NIH Dietary Supplement Label Database (DSLD), no number is typed in by an editor. This page draws directly on the NIH DSLD, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.