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.

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).

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).

• NAC + Glycine Powder Natural Peach Ginger FlavorPure Encapsulations1,800 mg
• N-Acetyl-L-Cysteine 1600 mgNaturaLife Labs1,600 mg
• VirunexHoltraCeuticals1,500 mg
• NAC N-Acetyl-L-Cysteine 600 mgThe Vitamin Shoppe1,200 mg
• Anti-Alcohol Antioxidants With HepatoProtection ComplexLife Extension1,200 mg
• Anti-Alcohol With HepatoProtection ComplexLife Extension1,200 mg
• Ar1macare ProOlympus Labs1,200 mg
• Anti-Alcohol HepatoProtection ComplexLife Extension1,200 mg

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.

In which products and brands?

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 21 of 34), each with the amount its label prints; an amount far outside what other labels print is marked as a possible slip.

• N.O.-Xplode XE Edge Fruit PunchBSN300 mg
• N.O.-Xplode XE Edge Green AppleBSN300 mg
• N.O.-Xplode XE Edge Tropical BurstBSN300 mg
• NACAllergy Research Group · off the market500 mg
• NACLiveLong · off the market1,000 mg
• NACBiotics Research Corporation500 mg
• NACMetabolic Maintenance600 mg
• NACCarlson · off the market500 mg
• NACIntegrative Therapeutics600 mg
• NACAdaptogen Research900 mg
• NACDouglas Cooper Co.600 mg
• NACSuperiorLabs · off the market1,200 mg
• NACXYMOGEN1.2 mg
• NACNutraBio600 mg
• NACPure Nootropics500 mg
• NACThorne500 mg
• NAC (N-Acetyl Cysteine) 600 mgBest Naturals600 mg
• NAC (N-Acetyl-Cysteine)Twinlab600 mg
• NAC (N-Acetyl-Cysteine)Welessentials600 mg
• NAC (N-Acetyl-Cysteine) 600 mgSwiss BioEnergetics600 mg
• NAC (N-Acetyl-L-Cysteine 600 mgNature's Blend · off the market600 mg
• NAC (N-Acetyl-L-Cysteine) 600 mgSolgar · off the market600 mg
• NAC (N-Acetyl-l-Cysteine) 600 mgVital Nutrients1,200 mg
• NAC + Glycine Powder Natural Peach Ginger FlavorPure Encapsulations1,800 mg
• NAC 1,000 mgLuckyVitamin1,000 mg
• NAC 1,000 mgHealthy Origins1,000 mg
• NAC 1,000 mg Quercetin 500 mg & Zinc 15 mgNOW1,000 mg
• NAC 1,200 mgNature's Truth1,200 mg
• NAC 1,200 mg UnflavoredNutricost1,200 mg
• NAC 1000 mgNOW1,000 mg
• NAC 1200 mgNusaPure1,200 mg
• NAC 400 mgSignature Supplements800 mg
• NAC 500ProCaps Laboratories500 mg
• NAC 500 mgProCaps Laboratories · off the market500 mg
• NAC 500 mgFairhaven Health500 mg
• NAC 500 mgWindmill Natural Vitamins500 mg
• NAC 500 mgBluebonnet500 mg
• NAC 500 mgMason Natural500 mg
• NAC 500 mgHarvest Naturals500 mg
• NAC 500 mgSeeking Health500 mg
• NAC 500 mg with Milk ThistleDr. Mercola500 mg
• NAC 500 N-Acetyl CysteineProCaps Laboratories · off the market500 mg
• NAC 575 mgDr. Clark Store575 mg
• NAC 600GNC · off the market600 mg
• NAC 600Vitamin Discount Center · off the market600 mg
• NAC 600 mgVitabase600 mg
• NAC 600 mgHealth Thru Nutrition Naturally · off the market600 mg
• NAC 600 mgVital Nutrients · off the market1,200 mg
• NAC 600 mgNature's Edge · off the market600 mg
• NAC 600 mgtnvitamins600 mg

Where next?

• Check an amount of N-acetyl cysteine
• Labels above the upper limit
• All ingredients