nac supplement
Worth a lookShows low returns (0.0%), but a concentrated shelf (top 5 take 81% of clicks) keeps it on the watch list.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible12.8%search→purchase rate — share of searches ending in a sale
Market size
Good£760K£760K/yr · 440K searches
Price range
Good£6.97–£32.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Avg price
Good£13.53avg listing price — sweet spot $15–$100
Review moat
Okay1,606.7avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay81%top-5 brand share — brands hold most of the demand
Growth
Bad-16.5%90-day search growth — must beat 0% to launch
Competition
Bad81%top-5 click share — a locked-up shelf
According to Flapen's Amazon United Kingdom niche tracking, nac supplement is a £760K/yr Amazon United Kingdom market (440K searches/yr). The top 5 brands hold 81% of demand. Verdict: Worth a look — 52/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
nac supplement market data
- Units sold / yr
- 50K–60K
- avg 3,000–4,000/product
- Revenue / yr
- £677K–£812K
- units × avg price
- Conversion rate
- 12.8%
- Avg BSR
- #8
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 80%
- Out of stock
- 1.7%
- Avg brand age
- 47 months
- Avg seller age
- 167 days
Competition & brand share
The top 5 products capture 81% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
26
Top-5 brand share
81%
Top 20: 100%
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 & seasonality
Weekly Amazon search volume, last 102 weeks — -16.5% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top nac supplement search terms
- 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
Top nac supplement products on Amazon
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
NAC N-Acetyl-Cysteine 600mg Capsules N-Acetyl Cysteine Nutritional Supplements 180 NAC Capsules - Nac Supplement High Bioavailability Amino Acid - Vegan Friendly - Made in UK by New Leaf
NEW LEAF PRODUCTS£7.734.5★526 rev
NAC N-Acetyl-Cysteine 600mg | 150 Capsules | Vegan N-Acetyl-Cysteine Nutritional Supplements| 5 Months Supply* | Better Bioavailable & Letter Box Friendly | UK Manufactured by Prowise Healthcare
PH PROWISE Healthcare£7.734.5★3,663 rev
NAC N-Acetyl-Cysteine 600mg - 180 Capsules (6 Months Supply) - 1 per Day - Vegan & GMP-Certified NAC Supplement - Precursor to Glutathione - N-Acetyl-Cysteine Nutritional Supplements - Made in Europe
WeightWorld£13.874.5★3,083 rev
Solgar NAC (N-Acetyl-L-Cysteine) 600 Mg Vegetable Capsules - Pack of 60 - Healthy Skin Hair and Nails - Vegan
Solgar£15.164.6★825 rev
NAC Supplement 1200mg Daily Serving 120 Vegan Capsules 2-Month Supply High Strength N-Acetyl-Cysteine for Daily Use UK Made Non-GMO Gluten-Free Dairy-Free High Bioavailability Formula
Multivita£6.974.3★147 rev
Newest
by launch dateNAC N-Acetyl-Cysteine 600mg Capsules N-Acetyl Cysteine Nutritional Supplements 180 NAC Capsules - Nac Supplement High Bioavailability Amino Acid - Vegan Friendly - Made in UK by New Leaf
NEW LEAF PRODUCTS£7.73526 rev
Toniiq 1300mg NAC - 2 Month Supply - Min. 98%+ Tested Purity - Ultra High Strength Bioavailable NAC Cysteine Supplement - 120 Vegetarian N Acetyl Cysteine Capsules -Lab Tested TQ
Toniiq£14.701,247 rev
VitaBright NAC Supplement | 600mg | 180 Capsules | Acetylcysteine Nutritional Supplements | Swallow or Twist Open Capsules of Powder | Pure Clean NAC N-Acetyl-Cysteine Supplement
VitaBright£12.01648 rev
NAC N-Acetyl-Cysteine 600mg - 180 Capsules (6 Months Supply) - 1 per Day - Vegan & GMP-Certified NAC Supplement - Precursor to Glutathione - N-Acetyl-Cysteine Nutritional Supplements - Made in Europe
WeightWorld£13.873,083 rev
NAC Supplement 1200mg Daily Serving 120 Vegan Capsules 2-Month Supply High Strength N-Acetyl-Cysteine for Daily Use UK Made Non-GMO Gluten-Free Dairy-Free High Bioavailability Formula
Multivita£6.97147 rev
Trending
90-day click momentumNAC N-Acetyl-Cysteine 600mg Capsules N-Acetyl Cysteine Nutritional Supplements 180 NAC Capsules - Nac Supplement High Bioavailability Amino Acid - Vegan Friendly - Made in UK by New Leaf
NEW LEAF PRODUCTS£7.734.5★
Pure Encapsulations NAC 600mg - Pure N-Acetyl-L-Cysteine for Glutathione Synthesis Support - 90 Capsules
Pure Encapsulations£32.004.5★
Solgar NAC (N-Acetyl-L-Cysteine) 600 Mg Vegetable Capsules - Pack of 60 - Healthy Skin Hair and Nails - Vegan
Solgar£15.164.6★
Toniiq 1300mg NAC - 2 Month Supply - Min. 98%+ Tested Purity - Ultra High Strength Bioavailable NAC Cysteine Supplement - 120 Vegetarian N Acetyl Cysteine Capsules -Lab Tested TQ
Toniiq£14.704.6★
N-Acetyl Cysteine (NAC) 600 mg 120 Capsules - UK Manufactured and Suitable for Vegans & Vegetarians
swiss bioenergetics£11.924.5★
What buyers say about nac supplement
What buyers praise and complain about, mined from review topics.What buyers love
“Good product; Arrived in very good condition, happy about quality and price, thank you Amazon”
“worth the money”
“Breath better”
“Great quality supplement”
“with a straightforward 600mg serving”
“Game changer for endometriosis”
“Effective”
“energy”
“it is better than I expected”
“Cleared my chest congestion”
What buyers complain about
“Smells like plastic”
“that would be a huge 2400mg dose”
“Poor quality”
“has some additives”
“seem to be getting heart burn”
“it smells and tastes like farts”
“Intolerance”
“Gave me bad stomach ache”
“Not noticed a difference with my skin yet”
“Made me terribly anxious and depressed”
Common questions
- Is nac supplement profitable to sell on Amazon United Kingdom?
- The niche generates £760K/yr across 10 tracked products. 90-day search growth is -16.5%. Flapen's verdict: Worth a look (52/100).
- How competitive is the nac supplement niche?
- 10 brands and 26 sellers compete. The top 5 products take 81% of clicks and top 5 brands hold 81% of demand.
- What do buyers complain about in nac supplement?
- Top complaints mined from reviews: Smell, Dosage, Quality-Overall. The return rate is 0.0%.
- When does demand for nac supplement peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the nac supplement niche?
- Listings span £6.97–£32.00; the average listing price is £13.53 (sweet spot $15–$100). The average incumbent carries 1,607 reviews — the moat a new listing must climb.