Thorne NAC - N-Acetylcysteine
vs
Protocol For Life NAC
Supplement Comparison

N-Acetyl-L-Cysteine (NAC) appears as N-Acetyl-L-Cysteine.

Protein and Branched-chain Amino Acids. Amino Acid Formula.

Immune System Support. Liver & Detox Support. Respiratory Health. Antioxidant Support.

Serving size: - Thorne NAC - N-Acetylcysteine: 1 capsule - Protocol For Life NAC: 1 tablet

N-Acetyl-L-Cysteine (NAC): Protocol For Life NAC has 2.0× more
The image below shows:
- Side-by-side charts with label nutrient amounts, per serving
- Nutrient forms as listed on the label
- 2 nutrients compared

Frequently asked questions

Protocol For Life NAC has the highest total amount of N-Acetyl-L-Cysteine (NAC): 1000 mg per serving

Serving size:
- Thorne NAC - N-Acetylcysteine: 1 capsule
- Protocol For Life NAC: 1 tablet

Last updated: February 9, 2026

Sources & Methodology: Nutrient data and forms are taken directly from Supplement Facts labels. Reviewed and standardized by the VIOscan Research Team. Learn more on the Methodology page.
We show the Recommended Dietary Allowance (RDA) when available. If no RDA exists, we show the Adequate Intake (AI). Tolerable Upper Intake Levels (UL) are used for upper limits. Unless otherwise noted, RDAs shown correspond to healthy adults aged 19–50 years and are sex-specific. Separate values exist for 51–70 years and >70 years, and pregnancy and lactation are excluded. All values come from the Dietary Reference Intakes (DRIs) published by the National Academies of Sciences, Engineering, and Medicine (NASEM), Food and Nutrition Board (FNB).
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Author: VIOscan Research Team