We earn commission on purchases made through our links. It never affects ranking: tables are ordered purely by price per dose, and no retailer or brand can pay for position.We earn commission when you buy through our links. It never affects the ranking. Full disclosure.

perdose
Updated

Home › Botanicals & extracts

Glucomannan

Also called konjac, konjac root, amorphophallus konjac.

The best price per 1 g and per month, form by form, across 3 UK retailers, and where to buy it cheapest. A unit for comparing, not advice.

Comparing glucomannan

We count the glucomannan a label states per serving, whatever the pack size or the serving size, so every product sits on one scale. Products that combine glucomannan with other ingredients are listed separately, because their price buys more than glucomannan. 1 g is our unit for comparing prices, not a dose to take: the label’s directions and a pharmacist decide that.

Glucomannan

Prices last checked: . Ranked purely by price per 1 g — a comparison unit, not a recommendation. We earn commission when you buy through these links; it never affects the order.

Compared at 1,000 mg. Enter the amount you take to see your own costs.

Sort and filterFilters
Retailers
Show
Glucomannan, Glucomannan: products ranked by price per 1 g
RankProductPer 1 gPer monthLastsBuyHow it is worked out
1
Bulk Glucomannan 500mg Capsules - Konjac Capsules - Tablets - Pills - Appetite Suppressant Capsules - Hunger Suppressant Capsules
Cheapest per doseGlucomannan 500mg Capsules - Konjac Capsules - Tablets - Pills - Appetite Suppressant Capsules - Hunger Suppressant Capsules180 capsules · 30 servings · 3 g a servingDetails and price historyAdd to my stack
17p£5.163 months£15.49View at Bulk (opens in a new tab)Free delivery over £49.00, otherwise £3.95AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 180 ÷ 6 per serving = 30
  • In the pack: 30 × 3 g = 90 g
  • £15.49 ÷ 90 g × 1 g = 17.2p per 1 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “180 Capsules”
  • units per serving “Per Serving (6 Capsules)”
  • amount per serving “Glucomannan ; 3 g”

Is this wrong? Tell us

2
Simply Supplements Glucomannan Fibre Capsules 3000mg
Glucomannan Fibre Capsules 3000mg120 capsules · 20 servings · 3 g a servingDetails and price historyAdd to my stackTesting claimed on label
23p£7.002 months£13.99View at Simply Supplements (opens in a new tab)Free delivery from £20.00, otherwise £1.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 120 ÷ 6 per serving = 20
  • In the pack: 20 × 3 g = 60 g
  • £13.99 ÷ 60 g × 1 g = 23.3p per 1 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • units per serving “Each individual glucomannan fibre capsule contains 500mg of glucomannan”
  • amount per serving “Glucomannan Fibre Capsules 3000mg”
  • confirmed values “confirmed from the retailer's own product page, not this listing's text: pack units 120; pack unit type capsule; units per serving 6.0”

Is this wrong? Tell us

3
GP Nutrition Fibre
FibreGP Nutrition · W-Wellness · 56 capsules · 28 servings · 1 g a servingDetails and price historyAdd to my stackclaimed: veganclaimed: gluten-free
48p£14.3628 days£13.40View at W-Wellness (opens in a new tab)Free delivery from £50.00, otherwise £3.99AmazonFind it on Amazon (opens in a new tab)A search, not a matched product. Price not compared.
Show the working
  • Servings: 56 ÷ 2 per serving = 28
  • In the pack: 28 × 1 g = 28 g
  • £13.40 ÷ 28 g × 1 g = 47.9p per 1 g
  • Amount per serving: stated on the label.
What the retailer's listing says
  • pack units “56 capsules”
  • units per serving “Per 2 caps”
  • amount per serving “Konjac Glucomannan 1g”

Is this wrong? Tell us

How we work out these prices

We count the amount of glucomannan per serving as stated on the label.

Questions

Where can I buy glucomannan cheapest in the UK?

On 20 October 2026, the cheapest glucomannan per dose from a UK seller was Glucomannan 500mg Capsules - Konjac Capsules - Tablets - Pills - Appetite Suppressant Capsules - Hunger Suppressant Capsules at Bulk (17p per 1 g, £5.16 a month). Then Glucomannan Fibre Capsules 3000mg at Simply Supplements (23p per 1 g, £7.00 a month) and Fibre at W-Wellness (48p per 1 g, £14.36 a month). That is by price per 1 g, across 3 UK retailers and 3 products, with every price checked daily; the table above shows the working for each.

What is the best price per 1 g of glucomannan today?

17p per 1 g, for Glucomannan 500mg Capsules - Konjac Capsules - Tablets - Pills - Appetite Suppressant Capsules - Hunger Suppressant Capsules at Bulk (17p per 1 g, £5.16 a month), on 20 October 2026. The dearest of the 3 products we price is 48p per 1 g, and the middle one is 23p.

How much does glucomannan cost per month?

At one 1 g dose a day, the cheapest works out at £5.16 a month, for Glucomannan 500mg Capsules - Konjac Capsules - Tablets - Pills - Appetite Suppressant Capsules - Hunger Suppressant Capsules at Bulk, on 20 October 2026. Across the 3 products we price it runs from £5.16 to £14.36 a month. A month is 30 days, and the figure follows the dose you enter in the table.

How long does a pack of glucomannan last?

At one 1 g dose a day, the packs we price last from 28 days to 3 months; the middle one lasts 2 months. Each row says how long its pack lasts at the dose you enter.

What does “per 1 g” mean?

It is the unit we use to put every product on the same scale: the price of 1 g of glucomannan, whatever the pack size or serving size. It is a comparison unit, not a recommendation of how much to take. Use the “Your daily dose” box to see costs at the amount you actually take.

Why is a product I have seen in the shops missing?

If a retailer’s listing does not let us confirm the amount per serving, the pack size or the form, we do not guess and we do not show the product. It appears once its label has been read and confirmed.

How up to date are the prices?

Prices on this page were last checked on 20 October 2026. Every table shows the date its prices were checked. Always confirm the price on the retailer’s site before buying.

Do retailers pay to appear higher?

No. We earn a commission when you buy through our links, but the order is set only by price per dose. No retailer or brand can pay for position.