VitaminDB Data · October 2026
The real cost of NAC, per dose
For the exact same amount of NAC — the same mg of active ingredient — the priciest products cost a 6.8× premium over the cheapest. We measured it across 61 tracked products, normalized to cost per mg.
Is the premium brand worth it?
On price, usually not. Two bottles of NAC can carry the identical active dose at wildly different prices — the spread between the cheap and the premium end is 6.8× per mg, from a low around $0.0001 to a high near $0.0007. A higher sticker price is not a reliable signal of a better product; most of that gap is branding and margin, not more NAC. Pay up only for a verifiable difference — third-party testing, or a specific better-absorbed form — never for the packaging.
Right now the best value in our catalog is 2 Pack NAC Supplement (N-Acetyl Cysteine) 1,000mg Serving… at $0.03 per serving — against a catalog median of $0.162/serving.
How we calculated it
Cost per active unit = price ÷ (servings per container × dose per serving), measured in NAC’s dominant dose unit (mg) so we only ever compare like with like — mg of NAC against mg of NAC.
Spread = the 90th-percentile cost per mg ÷ the 10th-percentile. Using the 10th/90th percentiles (not the absolute min/max) deliberately excludes one-off outliers and mislabeled listings. Based on 61 active NAC products from our live Amazon US catalog, recomputed hourly. This is a value comparison, not medical or dosing advice.
Part of the catalog-wide supplement price-spread study (median 7.3× across 75 nutrients).
Free to cite
Quote these figures with a link back to this page. Key data point (as of October 2026): for the same dose of NAC, the priciest products cost 6.8× more than the cheapest per mg, across 61 tracked products.
NAC cost FAQ
- How much does NAC vary in price for the same dose?
- For the same amount of NAC (per mg), the most expensive products cost about 6.8× more than the cheapest — based on 61 tracked products, comparing the 90th vs 10th percentile cost per mg. The median is $0.0002 per mg.
- Is the premium NAC brand worth it?
- On price alone, usually not: the priciest options deliver the same mg of NAC for up to 6.8× the cost. A higher price is not a reliable quality signal — pay more only for a verifiable difference such as third-party testing or a specific better-absorbed form, not for packaging.
- What is the cheapest NAC per dose right now?
- 2 Pack NAC Supplement (N-Acetyl Cysteine) 1,000mg Serving with Reduced… at $0.03 per serving is the lowest cost-per-dose NAC in our catalog. See the full ranking on the Best NAC page.