Nac Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Nac sales on Amazon US totaled 157,900 units in July 2026 (▼ 8.0% vs. the prior month), generating an estimated $3,497,242 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 66.5% of unit volume and 60.2% of revenue, while a typical listing is priced at $24.74. The keyword itself pulled 184,432 Amazon queries over the same period (▲ 20.6% MoM).
Zooming out to the 12-month window ending July 2026, the nac Top 50 moved 1,751,050 units and $38,481,510 in cumulative sales — an average of 145,921 units and $3,206,792 per month. Monthly throughput topped out at 171,700 units in June 2026 and dipped to 98,400 in May 2026, leaving the latest reading 22.4% higher than August 2025.
Nac Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
157.9K
▼ 8.0% MoM
Monthly Revenue 2026/07
$3.5M
▼ 6.3% MoM
Top 10 Market Share 2026/07
66.5%
Nac Market Share & Sales Concentration on Amazon US — July 2026
The most-sold nac listing on Amazon US in July 2026 is ASIN B008ML8D4O (Brand: Life Extension), which sold 20,000 units at $11.24 apiece — equal to 12.7% of every unit tracked in this report.
The Top 10 ASINs account for 105,000 units and $2,106,600 in July 2026 — 66.5% of unit volume and 60.2% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Nac' on Amazon
July 2026
Is 66.5% Top 10 share highly concentrated?
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Top 5 Volume Share breakdown
B008ML8D4O
Life Extension N-Acetyl-L-Cysteine (NAC), Immune, Respiratory, Liver Health, NAC 600 mg, Potent antioxidant Support, Free-radicals, Easy to Absorb, 60 Capsules
20K
▲ 0.0%vs. prior month
$181.6K
latest month
12-month trend
B01CUQFKW4
Nutricost N-Acetyl L-Cysteine (NAC) 600mg, 180 Capsules | GMO-Free And Gluten Free
20K
▲ 0.0%vs. prior month
$319K
latest month
12-month trend
B000FGZG3A
THORNE NAC, 500 mg N-Acetylcysteine, Amino Acid Supplement, 90 Capsules | Supports Respiratory & Immune Health, Promotes Liver & Kidney Detox*, Gluten, Dairy & Soy-Free, NSF Contents Certified
10K
▲ 0.0%vs. prior month
$330K
latest month
12-month trend
B0013OUQ3S
NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
10K
▼ 50.0%vs. prior month
$217.3K
latest month
12-month trend
B00OA6NLG0
Pure Encapsulations NAC 600 mg, 90 Capsules | N-Acetyl Cysteine NAC Supplement for Lung Health and Immune Support*, Liver Support and Antioxidants*
10K
▲ 0.0%vs. prior month
$385K
latest month
12-month trend
B0BG7M59NJ
Clean Nutraceuticals Milk Thistle NAC Chanca Piedra Beet Root Artichoke Astragalus Dandelion Root - Liver Cleanse Detox & Repair Supplement Plus TUDCA Choline & Ginger - 1Pack
10K
▲ 0.0%vs. prior month
$271.3K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Nac Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Nutricost is the best-performing nac brand in July 2026, moving 29,000 units across 3 ASINs for 27.6% of Top 10 volume. NOW Foods follows with 26,000 units (24.8%), ahead of Life Extension on 20,000 units (19.0%).
With 6 brands splitting the Top 10 and 71.4% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $11.24 to $18.60, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Nutricost
3 ASINs in Top 10
27.6%
Units
29K
Revenue
$480.6K
Avg. price
$16.95
B01CUQFKW4
$15.95·★4.6·14.5K revsNutricost N-Acetyl L-Cysteine (NAC) 600mg, 180 Capsules | GMO-Free And Gluten Free
Units sold20KB07983MH53
$21.95·★4.6·14.5K revsNutricost N-Acetyl L-Cysteine (NAC) 600mg, 240 Vegetarian Capsules | Vegan, GMO-Free, Gluten Free
Units sold5KB07984ZPVP
$12.95·★4.6·14.5K revsNutricost N-Acetyl L-Cysteine (NAC) 600mg, 120 Vegetarian Capsules | GMO-Free, Gluten Free, Vegetarian Caps
Units sold4K
NOW Foods
3 ASINs in Top 10
24.8%
Units
26K
Revenue
$458.1K
Avg. price
$18.60
B0013OUQ3S
$24.53·★4.6·21.1K revsNOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
Units sold10KB000MGWFWI
$11.88·★4.6·21.1K revsNOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 100 Capsules
Units sold9KB00KT3H13C
$19.39·★4.6·14.2K revsNOW Foods Supplements, NAC (N-Acetyl-Cysteine) 1,000 mg, Free Radical Protection*, 120 Tablets
Units sold7K
Life Extension
1 ASIN in Top 10
19.0%
Units
20K
Revenue
$181.6K
Avg. price
$11.24
B008ML8D4O
$11.24·★4.6·7.9K revsLife Extension N-Acetyl-L-Cysteine (NAC), Immune, Respiratory, Liver Health, NAC 600 mg, Potent antioxidant Support, Free-radicals, Easy to Absorb, 60 Capsules
Units sold20K
Trending Nac Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B0029XI2DI leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B07KR3LZNJ close behind at ▲ 100.0% MoM on 2K units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B0029XI2DI
Pure Encapsulations NAC 600 mg, 180 Capsules | N-Acetyl Cysteine NAC Supplement for Lung Health and Immune Support*, Liver Support and Antioxidants*
Price
$63.50
Rating
4.7
Reviews
3.9K
Latest month sales
B07KR3LZNJ
Life Extension N-Acetyl-L-Cysteine (NAC) 600mg, 150 Capsules
Price
$28.95
Rating
4.7
Reviews
1.1K
Latest month sales
B0FW18R82G
Nutricost NAC + Glycine Powder (250 Grams) Unflavored, Gluten-Free | 2,000mg NAC + 2,000mg Glycine per Serving, Vegan, GMO-Free, 62 Servings
Unlock to view ASIN details and product titles
Price
$21.95
Rating
4.3
Reviews
141
Latest month sales
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