PlainVitamins

non-nutrient/non-botanical

N-Acetyl Cysteine supplements

Half of the 1,259 N-acetyl cysteine supplements in the NIH label database that print an amount list 150 mg or less per serving; the middle half list 55 mg to 500 mg (DSLD version 9.4.0, January 2026). The 140 products whose only supplement ingredient is N-acetyl cysteine list a median of 600 mg.

Products listing it
1,6821,259 print an amount; 423 list it inside a blend without an amount
Median per serving
150 mgmiddle half 55 mg to 500 mg

How much N-acetyl cysteine do supplements contain?

The median product lists 150 mg per serving. One in ten lists 25 mg or less, one in ten 600 mg or more. The amount printed most often is 100 mg (178 products).

Products by amount of N-acetyl cysteine per serving

1,259 products, log scale; extreme 0.2% at each end left out of the drawing.

N-Acetyl Cysteine: products by amount per serving1 mg3 mg10 mg100 mg1,000 mg
N-Acetyl Cysteine: products by amount per serving1 mg3 mg10 mg30 mg100 mg300 mg
N-Acetyl Cysteine: products by amount per serving1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
N-Acetyl Cysteine: products by amount per serving1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
N-Acetyl Cysteine: products by amount per serving1 mg3 mg10 mg30 mg100 mg300 mg1,000 mg
The amounts printed most often
Amount per servingProductsFor example
100 mg178 Super Antioxidant Formula (Vitabase); Super Antioxidant Formula (Meijer Naturals); A.R.M.D. Eye Support Beta (Douglas Laboratories)
600 mg177 CSA Complete Spectrum Antioxidant (Viva Vitamins); N-Acetyl Cysteine 600 mg (Puritan's Pride); R3 Extreme (Cellucor)
50 mg138 Cell Protector (GNC Preventive Nutrition); High Potency Vita-Lea Gold With Vitamin K (Shaklee); Sublingual L-Glutathione Plus (Douglas Laboratories)
200 mg108 Liver Formula (GNC Preventive Nutrition); Cholesterol Regulation Complex (Shaklee); Age (Age Defense Formula) (Prime)
250 mg79 N-Acetyl-L-Cysteine 250 mg (Douglas Laboratories); GlucoPack (Douglas Laboratories); Detox Antiox (Designs for Health)
500 mg77 Shockwave Fruit Punch (Sci-Fit); Shockwave Grape (Sci-Fit); Shockwave Orange (Sci-Fit)
150 mg59 Vision Support (Pathway To Healing); OptiCleanse GHI Rice Original (XYMOGEN); OptiCleanse GHI Rice Raspberry Lemonade (XYMOGEN)
300 mg49 IGA+Intercellular Glutathione Inducers (Ecological Formulas); Ultimate Eye I (Dr. Stan Guberman); N.O.-Xplode XE Edge Fruit Punch (BSN)
25 mg47 Whole Body Rejuvenation Formula (Natural Factors); Ultra Preventive 2000 Series C.V. Support Pack (Douglas Laboratories); Histamet (Pathway To Healing)
125 mg26 Daily Energy Elements Chocolate Flavored (HoltraCeuticals); Amino D Tox (Designs for Health); Neuro-PTX (K47) (Apex Energetics)

Source: Supplement Facts rows of every product's current label, NIH ODS Dietary Supplement Label Database version 9.4.0; amounts in one measure (weight).

Which products list the most N-acetyl cysteine?

On-market products, per serving, with a plausible amount: the rule leaves out likely entry slips, such as an amount far beyond every other label with no %DV or strength on the label to back it (each product page still shows its own amount, marked).

Have the amounts changed over the years?

Products whose current label entered DSLD in 2012 list a median of 100 mg; those entered in 2025, 200 mg.

Median N-acetyl cysteine per serving by the year the label entered DSLD (years with 20+ products)
YearProductsMedian per serving
201294100 mg
201397100 mg
201442100 mg
201551100 mg
201646200 mg
201776158.5 mg
201862157.5 mg
201972125 mg
2020149200 mg
2021100250 mg
2022119200 mg
2023118200 mg
2024120250 mg
202598200 mg

Source: DSLD label entry dates and amounts, current labels.

In which products and brands?

Products listing N-acetyl cysteine by DSLD product type

N-Acetyl Cysteine by product typeOther Combinations1,096Non-Nutrient/Non-Botanical152Amino acid/Protein6Botanical with Nutrients4Multi-Vitamin and Mineral (MVM)1
N-Acetyl Cysteine by product typeOther Combinations1,096Non-Nutrient/Non-Botanical152Amino acid/Protein6Botanical with Nutrients4Multi-Vitamin and Mineral (MVM)1
N-Acetyl Cysteine by product typeOther Combinations1,096Non-Nutrient/Non-Botanical152Amino acid/Protein6Botanical with Nutrients4Multi-Vitamin and Mineral (MVM)1
N-Acetyl Cysteine by product typeOther Combinations1,096Non-Nutrient/Non-Botanical152Amino acid/Protein6Botanical with Nutrients4Multi-Vitamin and Mineral (MVM)1
N-Acetyl Cysteine by product typeOther Combinations1,096Non-Nutrient/Non-Botanical152Amino acid/Protein6Botanical with Nutrients4Multi-Vitamin and Mineral (MVM)1

Brands listing it most: Douglas Laboratories (45), XYMOGEN (36), Source Naturals (29), Pure Encapsulations (26), Integrative Therapeutics (22), Metagenics (20), Life Extension (20), Natural Factors (17), NuMedica (16), Ortho Molecular Products (14).

Every product listing N-acetyl cysteine

1,682 products, A to Z by name (page 11 of 34), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

Where next?