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.

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.

Returns

Incredible0.1%

return rate — above 5% kills the launch gate

Quality gap

Great4.1★

avg incumbent rating — lower means beatable quality

Growth

Great+79.6%

90-day search growth — must beat 0% to launch

Conversion

Great7.0%

search→purchase rate — share of searches ending in a sale

Review moat

Good1,057.87

avg incumbent reviews — the moat a new listing must climb

Brand share

Good75%

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

Bad75%

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

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

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

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.

Peak months: May, Jun · busiest ÷ quietest = 3.4×

Open Trend

Top glucomannan search terms

glucomannan124K/yr +75.6%6.9% conv.
glucomannan weight loss29K/yr +88.3%6.7% conv.
glucomannan capsules11K/yr +101.8%8.1% conv.
glucomannan complex5K/yr +274.3%5.4% conv.
glucomannan fibre4K/yr -19.9%6.3% conv.

All 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.

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

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£7.084.0★855 rev

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£14.953.7★502 rev

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£12.314.0★1,437 rev

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£15.033.4★31 rev

Horbäach£8.413.9★29 rev

Newest

by launch date

Horbäach£8.4129 rev

6mo ago

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£8.03686 rev

1y ago

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£8.408 rev

1y ago

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£12.443 rev

1y ago

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£14.95502 rev

1y ago

What buyers say about glucomannan

What buyers praise and complain about, mined from review topics.

What buyers love

Quality-Overall19%

“A good product with a good track record”

Value For Money15%

“Good value”

Joint Pain14%

“Good for joints”

Ease Of Chewing/Swallowing6%

“Easy to swallow”

Weight Loss5%

“I have found this to be such a useful supplement to aid my weight loss journey”

Efficiency5%

“seemed to be effective”

Advertised Vs Actual Product5%

“Does what it should be doing”

Ease Of Use4%

“taken with a glass full of water are very easy to go down”

Vitamin4%

“Vitamins, easy to swallow good amount of supply”

Nutritional Content3%

“overall I think theyre a useful addition if youre working on improving your eating habits”

What buyers complain about

Functionality-Overall22%

“Ineffective”

Size-Overall8%

“Large capsules,”

Ease Of Chewing/Swallowing6%

“can snap in half to swallow”

Taste-Overall4%

“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/Troubleshooting4%

“Unfortunately did nothing for me even though I followed the instructions”

Dosage4%

“Basically, it does not work and I am questioning what dosage or even what is actually in the pill”

Natural Resource Wastage3%

“I have wasted a lot of them for this reason”

Joint Pain3%

“Joint problems”

Advertised Vs Actual Product3%

“The description still states it has this but it doesnt any more.”

Vegan/Organic2%

“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.

glucomannan

glucomannan market data

Competition & brand share

Demand & seasonality

Top glucomannan search terms

Top glucomannan products on Amazon

Top sellers

Newest

Trending

What buyers say about glucomannan

What buyers love

What buyers complain about

Common questions

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