---
title: "Glucomannan — £139K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/glucomannan"
last_updated: "2026-07-31T11:35:55.786Z"
locale: en
meta:
description: "Niche score 58/100 · £139K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 58/100 · £139K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Glucomannan — £139K/yr Amazon UK Niche (2026) - Flapen"
---
# **glucomannan**
**Worth a look**
Shows low returns (0.1%), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size 31Growth 83Conversion 75Competition 21Returns 100Price range 19Avg price 46Brand share 50Review moat 61Quality gap 88
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Quality gap**
**Great****4.1★**
avg incumbent rating — lower means beatable quality
**Growth**
**Great****+79.6%**
90-day search growth — must beat 0% to launch
**Conversion**
**Great****7.0%**
search→purchase rate — share of searches ending in a sale
**Review moat**
**Good****1,057.87**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Good****75%**
top-5 brand share — brands hold most of the demand
**Avg price**
**Okay****£11.46**
avg listing price — sweet spot $15–$100
**Market size**
**Okay****£139K**
£139K/yr · 173K searches
**Competition**
**Bad****75%**
top-5 click share — a locked-up shelf
**Price range**
**Bad****£5.46–£17.26**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Signals**[** Out of Stock**](https://flapen.com/research/niches?market=uk&signal=out_of_stock "OOS rate > 10%")
According to Flapen's Amazon United Kingdom niche tracking, glucomannan is a £139K/yr Amazon United Kingdom market (173K searches/yr). The top 5 brands hold 75% of demand. Demand peaks in May–Jun. Verdict: Worth a look — 58/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **glucomannan market data**
- **Units sold / yr**
- **13K–15K**
- avg 1,000–1,250/product
- **Revenue / yr**
- **£143K–£172K**
- units × avg price
- **Conversion rate**
- **7.0%**
- **Avg BSR**
- **#235**
- **Page quality**
- **0%**
- **Prime**
- **93%**
- **Sponsored**
- **73%**
- **Out of stock**
- **11.8%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **166 days**
## **Competition & brand share**
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**14 **▲rising
**Sellers**
**19**
**Top-5 brand share**
**75%**
Top 20: 100%
**Top-5 click share**
**75%**
Top 20: 100%
**Open market**
**19%**
- Lindens25% - BANDINI16% - WeightWorld13% - NUMAN11% - Horbäach11% - Bulk6%
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +79.6% search growth over the last 90 days.
18K13KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May, Jun · busiest ÷ quietest = 3.4×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/glucomannan/trend)
## **Top glucomannan search terms**
- **glucomannan**124K/yr+75.6%6.9% conv. - **glucomannan weight loss**29K/yr+88.3%6.7% conv. - **glucomannan capsules**11K/yr+101.8%8.1% conv. - **glucomannan complex**5K/yr+274.3%5.4% conv. - **glucomannan fibre**4K/yr-19.9%6.3% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/glucomannan/search-terms)
## **Top glucomannan 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.
0%10%£14K20%£28K30%£42K40%£55K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 15 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Lindens Glucomannan (Konjac Fibre) Capsules - 3 000mg Per Serving - 90 Pack - Weight Loss Aid - Contributes Towards The Reduction of Appetite - Weight Loss Supplement - Letterbox Friendly**Lindens**£7.08**4.0★855 rev](https://www.amazon.co.uk/dp/B00OKE080O) [2**Bandini Glucomannan from the konjac Root 4200 mg per Daily dose 240 Capsules Optimized with Bacterial Cultures Chromium Vitamin B3 and Inulin High-Strength Supplement Vegan**BANDINI**£14.95**3.7★502 rev](https://www.amazon.co.uk/dp/B0DNTNJ23R) [3**Glucomannan Capsules from Konjac Root - 180 Glucomannan Powder Capsules - With Choline Chromium Vitamin D3 & Vitamin B3 - Non-GMO Gluten-Free & Vegetarian-Friendly - 1 Month Supply - Made in the UK**WeightWorld**£12.31**4.0★1,437 rev](https://www.amazon.co.uk/dp/B08Z826CNN) [4**Numan Glucomannan for Weight Loss Support Feel Full & Reduce Appetite Glucomannan Capsules 1000mg per Serving | Natural Fibre from Konjac Root Vegan-Friendly | 180 Capsules | Made in The UK**NUMAN**£15.03**3.4★31 rev](https://www.amazon.co.uk/dp/B0C8N6KYJY) [5**Glucomannan Capsules 4000mg | Konjac Root | Glucomannan Complex with Chromium | Vegan & Vegetarian Friendly | 120 Count | By Horbaach**Horbäach**£8.41**3.9★29 rev](https://www.amazon.co.uk/dp/B0GMY8YY41)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Glucomannan Capsules 4000mg | Konjac Root | Glucomannan Complex with Chromium | Vegan & Vegetarian Friendly | 120 Count | By Horbaach**Horbäach**£8.41**29 rev6mo ago](https://www.amazon.co.uk/dp/B0GMY8YY41) [**Glucosamine and Chondroitin High Strength 7-in-1 with MSM Collagen Vitamin C Citrus & Ginger Joint Care Supplements for Men & Women - 180 Tablets**NEW LEAF PRODUCTS**£8.03**686 rev1y ago](https://www.amazon.co.uk/dp/B0FDRDLMHJ) [**Nutrics Glucomannan Konjac Root Extract 21 000mg per Capsule 30:1 Extract 95% Glucomannan Standardised 90 V Capsules 100% Pure No Fillers Binders or Bulking Agents**Nutrics**£8.40**8 rev1y ago](https://www.amazon.co.uk/dp/B0G2SNK8ZD) [**Glucomannan Fibre 3000mg Capsules | Supports Weight Loss on an Energy-Restricted Diet | 120 Capsules | Manufactured in The UK in Accordance with GMP Standards**Simply Supplements**£12.44**3 rev1y ago](https://www.amazon.co.uk/dp/B0DW91WCQF) [**Bandini Glucomannan from the konjac Root 4200 mg per Daily dose 240 Capsules Optimized with Bacterial Cultures Chromium Vitamin B3 and Inulin High-Strength Supplement Vegan**BANDINI**£14.95**502 rev1y ago](https://www.amazon.co.uk/dp/B0DNTNJ23R)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Numan Glucomannan for Weight Loss Support Feel Full & Reduce Appetite Glucomannan Capsules 1000mg per Serving | Natural Fibre from Konjac Root Vegan-Friendly | 180 Capsules | Made in The UK**NUMAN**£15.03**3.4★**▲ 125%**](https://www.amazon.co.uk/dp/B0C8N6KYJY) [**Glucomannan Capsules 4000mg | Konjac Root | Glucomannan Complex with Chromium | Vegan & Vegetarian Friendly | 120 Count | By Horbaach**Horbäach**£8.41**3.9★**▲ 94%**](https://www.amazon.co.uk/dp/B0GMY8YY41) [**Nutrics Glucomannan Konjac Root Extract 21 000mg per Capsule 30:1 Extract 95% Glucomannan Standardised 90 V Capsules 100% Pure No Fillers Binders or Bulking Agents**Nutrics**£8.40**4.5★**▲ 84%**](https://www.amazon.co.uk/dp/B0G2SNK8ZD) [**Glucomannan Fibre 3000mg Capsules | Supports Weight Loss on an Energy-Restricted Diet | 120 Capsules | Manufactured in The UK in Accordance with GMP Standards**Simply Supplements**£12.44**4.2★**▲ 36%**](https://www.amazon.co.uk/dp/B0DW91WCQF) [**Glucomannan 4200 mg per Daily Dose with Vitamin B3 and Chromium Konjac Root Fibre for Weight Control 180 Vegan Capsules Zenement**Zenement**£14.08**4.0★**▲ 32%**](https://www.amazon.co.uk/dp/B07CWF7VDC)
**~~View all trending →~~**
## **What buyers say about glucomannan**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**19%
*“A good product with a good track record”*
**Value For Money**15%
*“Good value”*
**Joint Pain**14%
*“Good for joints”*
**Ease Of Chewing/Swallowing**6%
*“Easy to swallow”*
**Weight Loss**5%
*“I have found this to be such a useful supplement to aid my weight loss journey”*
**Efficiency**5%
*“seemed to be effective”*
**Advertised Vs Actual Product**5%
*“Does what it should be doing”*
**Ease Of Use**4%
*“taken with a glass full of water are very easy to go down”*
**Vitamin**4%
*“Vitamins, easy to swallow good amount of supply”*
**Nutritional Content**3%
*“overall I think theyre a useful addition if youre working on improving your eating habits”*
### **What buyers complain about **
**Functionality-Overall**22%
*“Ineffective”*
**Size-Overall**8%
*“Large capsules,”*
**Ease Of Chewing/Swallowing**6%
*“can snap in half to swallow”*
**Taste-Overall**4%
*“Ease of swallow no taste just being using for a few weeks will need to take a little longer to see some affects for now not a great difference can be seen”*
**Instructions/User Manual/Troubleshooting**4%
*“Unfortunately did nothing for me even though I followed the instructions”*
**Dosage**4%
*“Basically, it does not work and I am questioning what dosage or even what is actually in the pill”*
**Natural Resource Wastage**3%
*“I have wasted a lot of them for this reason”*
**Joint Pain**3%
*“Joint problems”*
**Advertised Vs Actual Product**3%
*“The description still states it has this but it doesnt any more.”*
**Vegan/Organic**2%
*“Our Glucosamine and Chondroitin Complex is not halal”*
## **Common questions**
- **Is glucomannan profitable to sell on Amazon United Kingdom?**
- The niche generates £139K/yr across 15 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +79.6%. Flapen's verdict: Worth a look (58/100).
- **How competitive is the glucomannan niche?**
- 14 brands and 19 sellers compete. The top 5 products take 75% of clicks and top 5 brands hold 75% of demand.
- **What do buyers complain about in glucomannan?**
- Top complaints mined from reviews: Functionality-Overall, Size-Overall, Ease Of Chewing/Swallowing. The return rate is 0.1%.
- **When does demand for glucomannan peak?**
- Demand peaks in May–Jun; the busiest month runs 3.4× the quietest.
- **What does it cost to enter the glucomannan niche?**
- Listings span £5.46–£17.26; the average listing price is £11.46 (sweet spot $15–$100). The average incumbent carries 1,058 reviews — the moat a new listing must climb.
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