PlainVitamins

Premier NAC

by Premier Research Labs · capsule · 60 plant-source capsules

  • On the market (NIH)
  • UPC 8 07735 02171 9
  • DSLD label 297550
  • Serving 1 capsule
  • 60 servings

Premier NAC by Premier Research Labs lists 4 ingredients, 1 with an amount per serving of 1 capsule, such as 300 mg of N-acetyl cysteine; 3 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on October 24, 2023.

What is in Premier 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).

Premier NAC: Supplement Facts rows against the market (DSLD label 297550, January 2026 release)
IngredientAmount% DVAmong products listing it
N-Acetyl Cysteine300 mgN-Acetyl Cysteine in Premier NAC against 1,259 products300 mg per serving; the middle half of products list 55 mg to 500 mg, the median 150 mg.300 mg

Higher than 67% of 1,259 products listing N-acetyl cysteine (median 150 mg). Per day at the most servings: 600 mg.

NAC Excel Blend228 mg
TurmericOrganicin the blend, no amount given
Milk ThistleOrganicin the blend, no amount given
Green Tea leaf extractin the blend, no amount given

Source: NIH ODS Dietary Supplement Label Database, label 297550 (entered October 24, 2023), 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient; 3 ingredients sit inside a blend, so their amounts cannot be compared.

The NIH database records 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?

1 product lists 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
Suggested use: Take 1 capsule, 2 times daily or as directed by a health professional.
Warnings
Keep out of reach of children.
Premier detoxification, liver and antioxidant support
Tamper seal: Use only if seal is intact.
Consult your health practitioner if you are pregnant or nursing, taking medication or have a medical condition, before taking this product.
Allergens and what it does not contain
Non-GMO Aflatoxin tested (botanicals) No added mag-nesium Forensic tested for adulterants Heavy metal tested
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 297550.

What else is on the label?

Other ingredients: Plant-Source Capsule.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): OU (Kosher).

How many labels does Premier NAC have?

3 labels are on file under this name since May 22, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 297550 (current) Entered October 24, 2023 · on the market · 60 plant-source capsules · UPC 8 07735 02171 9
  2. Label 270007 Entered June 16, 2022 · off the market November 28, 2022 · 60 plant-source capsules
  3. Label 219617 Entered May 22, 2020 · off the market November 28, 2022 · 60 vegetarian capsules · UPC 8 07735 02171 9

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names Premier Research Labs (manufacturer). All Premier Research Labs products.

Where next?