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Nac Supplement

Maybe

An estimated 0.0% of orders come back. But the top 5 products take 81% of clicks, so Nac Supplement is a Maybe.

Flapen Score
52
52 / 100
Top 33% of 2,035 Health & Personal Care niches · +4 vs the category median of 48
Market size
£760K/yr440K searches / yr
90-day growth
-16.5%search demand this quarter
Competition
81%top-5 click share · 10 brands · 26 sellers

Flapen Score

Nac Supplement against its category

The dotted line is the Health & Personal Care average. Past it, Nac Supplement is stronger. Inside it, weaker.

52Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Nac Supplement market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Nac Supplement 440K times last year and spent an estimated £760K. The top 5 brands take 81% of clicks. Flapen scores it 52 out of 100, a Maybe.

01 · Demand

An estimated 12.8% of those searches ended in a purchase.

Shoppers searched for this 440K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 12.8% of those searches ended in a purchase. Searches in the last 90 days moved -16.5% against the 90 days before. Searches, conversion and average price together put the market at an estimated £760K a year.

Searches, last 12 months
440K
Growth, 90 days vs prior 90
-16.5%
Conversion, latest week
12.8%
Market size, estimated
£760Ka year
Peak month
January1.5× the quietest month
Top search term
nac supplement185K searches a year

02 · Price

A sale here is worth £13.53.

Listings sell for £13.53 on average, from £6.97 to £32.00. Amazon reports units sold in ranges. This niche sold 50K to 60K a year. The average listing sells 3,000 to 4,000 of them. At £13.53 that is £41K to £54K a year per listing.

Average price
£13.53under the $15 to $100 sweet spot
Price range
£6.97–£32.00
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
50K–60K
Units per listing a year
3,000–4,000
Revenue per listing a year
£41K–£54K
Returns
0.0%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

80% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 1.7% of listings are out of stock. The average listing ranks #8 within Amino Acids. It carries 1,607 reviews at 4.49 stars, so a new listing needs social proof before a better product.

Sponsored listings
80%
Prime listings
100%
Out of stock, average day
1.7%
Average rank
#8in Amino Acids
Average rating
4.49 starsAmazon United Kingdom average 4.36 stars
Average reviews
1,607per listing
Listings tracked
10

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 47 months on average, so the names here are settling in.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
47 months

Products

Top Nac Supplement products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 25, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 81% of clicks. A locked shelf that new listings rarely crack.

£0£114K£228K£342K£456K1001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

10 falling

Sellers

26

Est. top-5 brand share

81%

Top 20: 100%

Est. top-5 click share

81%

Top 20: 100%

Open market

14%

  • NEW LEAF PRODUCTS40%
  • PH PROWISE Healthcare17%
  • WeightWorld9%
  • Solgar8%
  • Multivita7%
  • VitaBright5%
  • Open — no brand owns it (4 brands, 14%)

Demand

Nac Supplement search demand

Weekly searches over the year, seasonality beneath. Pick a range.

10K6KBlack Friday '24Spike '25Black Friday '25Holiday '25Spike '26DecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.5×

Search terms

Top Nac Supplement search terms shoppers use

The exact words shoppers type, with estimated yearly volume, growth, and conversion.

  • nac supplement185K/yr
  • nac158K/yr
  • augmented nac11K/yr
  • nac n-acetyl-cysteine 600mg18K/yr
  • nac 600mg10K/yr
  • n acetyl cysteine13K/yr
  • n-acetylcysteine10K/yr
  • n-acetyl-cysteine nutritional supplements8K/yr
  • l cysteine3K/yr
  • n-acetyl cysteine6K/yr

Reviews and returns

What reviews say buyers love and hate about Nac Supplement

We read the reviews and the return reasons for every product selling here.

22%of positive reviews mention “Quality-Overall”
22%of negative reviews mention “Smell”
<0.1%of orders come back, a rate Amazon rounds to zero
“Smells like plastic”
A buyer, on “Smell”22% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

17 topics

NegativePositive

FAQ

Common Nac Supplement questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data