Inositol
Worth a lookShows a $11.0M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size
Incredible$11.0M$11.0M/yr · 6.2M searches
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Avg price
Incredible$28.80avg listing price — sweet spot $15–$100
Price range
Great$8.21–$84.10cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good6.1%search→purchase rate — share of searches ending in a sale
Brand share
Good71%top-5 brand share — brands hold most of the demand
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Growth
Bad-1.8%90-day search growth — must beat 0% to launch
Review moat
Bad8,158.84avg incumbent reviews — the moat a new listing must climb
Is inositol profitable on Amazon?
According to Flapen's Amazon United States niche tracking, inositol is a $11.0M/yr Amazon United States market (6.2M searches/yr). The top 5 brands hold 71% of demand. Verdict: Worth a look — 61/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
inositol market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 300K–400K
- avg 15,000–20,000/product
- Revenue / yr
- $8.6M–$11.5M
- units × avg price
- Conversion rate
- 6.1%
- Avg BSR
- #87
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 89%
- Out of stock
- 3.1%
- Avg brand age
- 56 months
- Avg seller age
- 142 days
Competition: brands, sellers & click share
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.Brands
14 falling
Sellers
26
Top-5 brand share
71%
Top 20: 100%
Top-5 click share
60%
Top 20: 100%
Open market
23%
- Wholesome Story35%
- SMNutrition13%
- Nutricost10%
- Optify7%
- Intimate Rose6%
- MEDCHOICE5%
inositol demand & seasonality
Weekly Amazon search volume, last 100 weeks — -1.8% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.7×
Top inositol search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- inositol2.5M/yr
- myo inositol953K/yr
- myo-inositol & d-chiro inositol718K/yr
- inositol supplement for women658K/yr
- pcos supplements443K/yr
- pcos263K/yr
- inositol supplement134K/yr
- myo-inositol122K/yr
- myo & d-chiro inositol for women47K/yr
- wholesome story myo d chiro inositol50K/yr
Top inositol products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 19 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Wholesome Story Myo-Inositol & D-Chiro Inositol Supplement for Women | Fertility Supplements for Hormonal Balance & Ovarian Health Support | Myoinositol | Ideal 40:1 Ratio | 30 Servings
Wholesome Story$27.194.4★35,951 rev
Myo-Inositol & D-Chiro Inositol for Hormone Balance for Women 40:1 Ratio
SMNutrition$19.354.6★3,353 rev
Optify Myo-Inositol & D-Chiro Inositol Supplement for Women | 40:1 Ratio Plus Folate and Vitamin D | Support Healthy Hormonal Balance Regular Cycles & Ovarian Health (120 Count (Pack of 1))
Optify$24.904.5★11,804 rev
Nutricost Inositol Capsules 500mg 240 Capsules (Myo-Inositol) GMO-Free
Nutricost$16.604.7★861 rev
Intimate Rose Myo-Inositol & D-Chiro Inositol Supplement for Women - Hormone Balance & Ovarian Support for Women - Ideal 40:1 Ratio Vitamin D + Ashwagandha
Intimate Rose$24.564.7★6,018 rev
Newest
by launch date
Black Girl Vitamins Inositol Supplement 2000mg Myo + 50mg D-Chiro Vegan Capsules to Support Hormone Balance Healthy Ovarian & Menstrual Wellness 60 Count
Black Girl Vitamins$26.20442 rev
Myo-Inositol & D-Chiro Inositol Supplement For Women (120 Capsules 2050mg Per Serving Ideal 40:1 Ratio Myo Inositol) Hormone Balance for Women - Third Party Tested Vegan Safe & USA Made - 120 Count
DORADO NUTRITION$14.231,235 rev
Intimate Rose Myo-Inositol & D-Chiro Inositol Supplement for Women - Hormone Balance & Ovarian Support for Women - Ideal 40:1 Ratio Vitamin D + Ashwagandha
Intimate Rose$24.566,018 rev
14-in-1 Womens Inositol Complex Supplement 40:1 Myo & D-Chiro Inositol with Folate Vitamin D3 Zinc Magnesium & Botanicals for Hormone & Feminine Wellness Support (120 Capsules) (Pack of 1)
MEDCHOICE$23.73980 rev
Theralogix Ovasitol Inositol Powder - 90-Day Supply - Myo-Inositol & D-Chiro Inositol for Hormone Balance & Ovarian Function Support* - NSF Certified - 400 g (180 Servings)
Theralogix$84.103,713 rev
Trending
90-day click momentumBlack Girl Vitamins Inositol Supplement 2000mg Myo + 50mg D-Chiro Vegan Capsules to Support Hormone Balance Healthy Ovarian & Menstrual Wellness 60 Count
Black Girl Vitamins$26.204.5★
Theralogix Ovasitol Inositol Powder - 90-Day Supply - Myo-Inositol & D-Chiro Inositol for Hormone Balance & Ovarian Function Support* - NSF Certified - 400 g (180 Servings)
Theralogix$84.104.6★
Wholesome Story Myo-Inositol & D-Chiro Inositol Supplement for Women | Fertility Supplements for Hormonal Balance & Ovarian Health Support | Myoinositol | Ideal 40:1 Ratio | 90 Servings
Wholesome Story$69.534.4★
Nutricost Myo Inositol & D-Chiro Inositol for Women 120 Capsules GMO-Free
Nutricost$14.214.6★
Nutricost Inositol Capsules 500mg 240 Capsules (Myo-Inositol) GMO-Free
Nutricost$16.604.7★
What reviews say buyers love and hate about inositol
What buyers praise and complain about, mined from review topics.What buyers love
“the quality feels consistent”
“Good for your hormones”
“I really thought this would help with fertility”
“Helped with menstrual cycle”
“Good brand of vitamins”
“Good price”
“it may have helped me”
“It definitely does work”
“energy levels up”
“helping me on my weight loss journey”
What buyers complain about
“BAD stomach cramps”
“Dose to high”
“No Results”
“Taste terrible”
“Not worth it”
“Bloating”
“But I have had a rash on my neck”
“which is a common problem with some supplements”
“No weight loss”
“It triggered my anxiety”
Top return reasons
Common inositol questions
- Is inositol profitable to sell on Amazon United States?
- The niche generates $11.0M/yr across 19 tracked products. 90-day search growth is -1.8%. Flapen's verdict: Worth a look (61/100).
- How competitive is the inositol niche?
- 14 brands and 26 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 71% of demand.
- What do buyers complain about in inositol?
- Top complaints mined from reviews: Side Effects, Dosage, Functionality-Overall. The return rate is 0.0%.
- When does demand for inositol peak?
- Demand is steady year-round — the busiest month runs 1.7× the quietest.
- What does it cost to enter the inositol niche?
- Listings span $8.21–$84.10; the average listing price is $28.80 (sweet spot $15–$100). The average incumbent carries 8,159 reviews — the moat a new listing must climb.