inositol
Worth a lookShows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Brand share
Great53%top-5 brand share — no brand owns this niche
Conversion
Good6.6%search→purchase rate — share of searches ending in a sale
Review moat
Good773.39avg incumbent reviews — the moat a new listing must climb
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Market size
Good£598K£598K/yr · 733K searches
Competition
Good53%top-5 click share — leaders hold, buyers still browse
Avg price
Good£12.31avg listing price — sweet spot $15–$100
Price range
Okay£4.88–£24.45cheapest to priciest tracked listing — scored on the share inside $15–$100
Growth
Bad-11.9%90-day search growth — must beat 0% to launch
According to Flapen's Amazon United Kingdom niche tracking, inositol is a £598K/yr Amazon United Kingdom market (733K searches/yr). The top 5 brands hold 53% of demand. Demand peaks in Apr. Verdict: Worth a look — 61/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
inositol market data
- Units sold / yr
- 40K–50K
- avg 1,500–2,000/product
- Revenue / yr
- £492K–£616K
- units × avg price
- Conversion rate
- 6.6%
- Avg BSR
- #244
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 87%
- Out of stock
- 2.9%
- Avg brand age
- 45 months
- Avg seller age
- 161 days
Competition & brand share
The top 5 products take 53% of clicks — established leaders, but buyers still shop beyond them.Brands
23 falling
Sellers
27
Top-5 brand share
53%
Top 20: 97%
Top-5 click share
53%
Top 20: 97%
Open market
40%
- NEW LEAF PRODUCTS17%
- Nutrivo10%
- Free Soul10%
- PH PROWISE Healthcare9%
- VitaBright7%
- QSTA7%
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — -11.9% search growth over the last 90 days.Peak months: Apr · busiest ÷ quietest = 2.5×
Top inositol search terms
- inositol258K/yr
- myo-inositol142K/yr
- myo inositol73K/yr
- myo inositol d chiro inositol55K/yr
- pcos supplement55K/yr
- inositol tablets38K/yr
- pcos43K/yr
- inositol 4000mg10K/yr
- myo-inositol 4000mg7K/yr
- inositol 40 1 ratio6K/yr
Top inositol 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 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Myo-Inositol PCOS Supplement - Myo Inositol Capsules PCOS Supplement Enriched with Folic Acid Vitamin B12 and Chromium - Hormone Balance for Women 120 Vegan Capsules UK Made New Leaf Vitamin B8
NEW LEAF PRODUCTS£10.294.6★476 rev
Myo Inositol & D Chiro Inositol - 120 Capsules | Inositol 2000mg Folic Acid Chromium | Alternative to Tablets
Nutrivo£7.854.5★329 rev
Free Soul Myo-Inositol Ultra Supplement | 4 000mg Myo-Inositol 200ug Folate 100ug Chromium Plus 10 000mg Maca for Women | Supplements for Women | Vegan & Gluten-Free | 120 Tablets
Free Soul£18.854.2★689 rev
Myo-Inositol Complex 120 Vegan Tablets 7000mg per Serving with Black Maca Root Chromium Folic Acid and Vitamin B12 | Hormonal Balance for Women Women PCOS Supplement | Premium Quality by Prowise
PH PROWISE Healthcare£8.144.2★271 rev
VitaBright Myo-Inositol D-Chiro-Inositol Tablets | 4000mg A Day | 120 Chewable Tablets | Contribute to Hormone Balance for Women | D Chiro & Myoinositol (Vitamin B8) with Chromium B6 & Folic Acid
VitaBright£14.224.6★342 rev
Newest
by launch date
Inositol Myo & D Chiro - 4000mg Folic Acid Vitamin D3 Vitamin B6 Womens Daily Wellness Support Vegan & Gluten-Free 60 Capsules
Keka Naturals£11.5816 rev
Myo-Inositol Complex - PCOS Supplement & Hormone Balance for Women Inositol with Zinc Folic Acid Vitamin B6 & Chromium 90 Vegan Capsules Lab-Tested & UK Made - Easy to Swallow Tablets
SuperSelf£7.7624 rev
Myo-Inositol & D-Chiro Inositol (Capsules) PCOS Supplement with Folic Acid 2200 mg Inositol Complex per Serving Cycle & Hormonal Support 180 Vegan Capsules Lab Tested GMP Certified
SUPLINT£12.36333 rev
Grounded Inositol 500mg | 120 Micro Tablets | Pure Myo-Inositol for Hormonal Balance & Mental Performance | 2 Month Supply | Vegan-Friendly & Made in the UK
G R O U N D E D COFFEE SCRUB£5.8727 rev
Inspiriko 5-in-1 Myo-Inositol Powder 4000mg with Folate Chromium Vitamin B6 & B12-30 Vegan 1-a-Day Myo Inositol Powder Sachets Made in UK
Inspiriko£21.10138 rev
Trending
90-day click momentumInositol Myo & D Chiro - 4000mg Folic Acid Vitamin D3 Vitamin B6 Womens Daily Wellness Support Vegan & Gluten-Free 60 Capsules
Keka Naturals£11.583.9★
Nutravita Myo-Inositol Tablets with Folic Acid Vitamin B6 B12 Maca and Chromium - PCOS Support Supplement - 180 Vegan Tablets - Prenatal Vitamins for Women - Alternative to Inositol Powder
Nutravita£7.224.3★
Myo-Inositol & D-Chiro 4100MG Vegan Capsules Metabolic Function Hormonal Balance and Psychological Function 9-in-1 Myo Inositol Folate 5-MTHF Chromium Zinc VIT B6 B12 & D3
QSTA£19.404.3★
Myo Inositol & D Chiro Inositol 4000mg PCOS Supplement with Chromium Folic Acid & Vitamin B6-60 Vegan Tablets By Alpha01
ALPHA01£4.884.5★
Myo-Inositol Tablets - 4000mg Myo-Inositol Supplements - 120 Vegan Tablets - with 1.5mg Vitamin B6 200g Vitamin B9 as Folic Acid & 100g Chromium - Non-GMO & Gluten Free
WeightWorld£13.854.2★
What buyers say about inositol
What buyers praise and complain about, mined from review topics.What buyers love
“Happy is chewable”
“No complaints”
“This is helping me to get my cycle regularly”
“Good value”
“Helps support regular menstrual cycle”
“Vitamins, easy to swallow good amount of supply”
“best energy”
“which makes daily use straightforward”
“No side effects”
“Noticed my weight has dropped to the lowest it has ever been during my journey with PCOS”
What buyers complain about
“Very large tablets”
“Questionable Dosage”
“Impossible to swallow”
“No positive results”
“all l got were terrible heartburns l couldn't finish it”
“They are expensive too”
“after taking these supplements for around 6 months and have found myself feeling totally knackered all day. as per my previous state., getting more snappy with people, hands shaking, wanting to snack on unhealthy foods and very bloated compared with when I was taking these”
“Acne breakouts”
“There were several poor quality pills in the box”
“The formulation of these is literally horrible”
Common questions
- Is inositol profitable to sell on Amazon United Kingdom?
- The niche generates £598K/yr across 23 tracked products. 0 of 2 products launched in the last 360 days are still selling. 90-day search growth is -11.9%. Flapen's verdict: Worth a look (61/100).
- How competitive is the inositol niche?
- 23 brands and 27 sellers compete. The top 5 products take 53% of clicks and top 5 brands hold 53% of demand.
- What do buyers complain about in inositol?
- Top complaints mined from reviews: Size-Overall, Dosage, Ease Of Chewing/Swallowing. The return rate is 0.1%.
- When does demand for inositol peak?
- Demand peaks in Apr; the busiest month runs 2.5× the quietest.
- What does it cost to enter the inositol niche?
- Listings span £4.88–£24.45; the average listing price is £12.31 (sweet spot $15–$100). The average incumbent carries 773 reviews — the moat a new listing must climb.