FREE, Fast UK Delivery
Search Supplements & Articles
Your Account
Speedy Quick Re-Order
View your Shopping Basket
SALE EXTENDED! - EVERYTHING IS REDUCED! Sale Ends 23:59 28th Jan 2022

Glucomannan Capsules - 500mg

Contributes to weight loss as part of an energy-restricted diet

55 reviews9810040
Only 5.0p per capsule
In stock
- Best Price
Only 4.5p per capsule
In stock
In Stock

Key features

  • 95% glucomannan extract
  • Naturally-sourced from Konjac
  • Contributes to weight loss
  • Easy to swallow capsule
Glucomannan capsule view
Capsule Size
21mm x 7mm capsule
  • Description
  • Product Information
  • Feefo Reviews Reviews

Glucomannan is a natural, water-soluble dietary fiber extracted from the roots of the elephant yam, also known as konjac.

Clinically proven to support weight loss

Glucomannan has been proven to contribute to weight-loss as part of an energy-restricted diet.

It is approved by the European Food Safety Authority (EFSA) as a proven and safe supplement to aid weight loss and lower cholesterol levels, when taken as part of a calorie controlled diet. The bulk-forming fibre absorbs water in the stomach and it is believed to promote weight loss via several mechanisms:

  1. It has a very low calorie content.
  2. It takes up space in the stomach and promotes a feeling of fullness (satiety), reducing food intake at a subsequent meal.

What is unique about glucomannan?

Glucomannan absorbs so much liquid that if you empty a capsule into a small glass of water, the entire thing turns into a gel. Because of this, it is important to take capsules with a full glass of water to safely and naturally assist weight loss. 

In addition to being sold as a dietary supplement, it is used as a food additive, specifically as an emulsifier and thickener denoted as E425. It is a common ingredient in foods such as pasta, noodles and tofu.

Premium grade glucomannan

Our supplement is made using 95% glucomannan extract - many competitors don't even declare their content and can use different fillers instead.

Nutritional Information
Two capsules provide 1g of Glucomannan. A daily intake of 3 g of Glucomannan in three doses of 1 g each, together with 1-2 glasses of water before meals and in the context of an energy-restricted diet contributes to weight loss.
Allergen Advice
For allergens, see ingredients highlighted in bold.
Cautions / Possible Side Effects
Swallow with plenty of water to ensure the Glucomannan powder reaches your stomach.Take extra care if you usually have difficulty swallowing capsules.
List of Ingredients
Konjac Root Powder (95% Glucomannan), Hydroxypropylmethyl Cellulose, Stearic Acid.
Dosage / Suggested Intake
Adults: Swallow two capsules before each of your three daily meals. Swallow with 1-2 glasses of water and take extra care if you usually have difficulty swallowing capsules.
Legal Category
Food Supplement


Customer Reviews for Glucomannan

The views expressed below are the personal opinion of Just Vitamins customers. Just Vitamins does not endorse these views, nor should they be regarded as health claims or medical advice. All reviews are collected and verified as genuine by a 3rd party called Feefo.

Overall product rating 9.8 / 10 - 55 customers have independently reviewed and recommend Glucomannan from 55 reviews (showing latest 25 reviews)
Review Date
Review Details
Service rating: Fast and efficient service, what you see is what you get. Very good price compared to other companies.
Product: Been looking for something like this for a while glad I found this company
Service rating: Great service
Product: Easy to take no after taste
Service rating: Excellent service and
choice of supplement and very happy with the price will order again when needed.
Product: Have not finished yet cannot comment
Service rating: Very reliable
Product: An effective,affordable vitamin
Very satisfied
Service rating: Good service
Product: Good quality Good price !!
Service rating: It was ok,
Product: I followed the instructions of drinking plenty of water… I didn’t feel full at all!!
Got quite constipated.loved a few days.
I’m a water fan and a Nurse so I understand the importance of hydration,… sorry but I’m so disappointed
Service rating: My purchase arrived quickly and was packaged well. I was given good communication about my delivery.
Product: They don't work as well as is hoped they would. I drank about 300ml of water with 2 pills before each meal. I tried these for 3 days but noticed no great difference.
Service rating: Fast and efficient service. Arrived well packaged. Product in easy to use capsules. Really reduced appet8.
Product: Easy to use as it's in capsules. Really reduced my hunger, enables me to fast longer
Service rating: Excellent. Delivered promptly, good quality product. Will use this company again.
Product: Excellent product. Really satiates hunger and maintains good gut health.
Service rating: Ease, pleased and will return
Product: It really works I'm impressed
Fast delivery and packaged well.
Great value and fast delivery
Service rating: Good product fast service
Product: Great really happy with them
Service rating: My order was delivered really quickly, nothing else I can say , very pleased
Product: I am hoping that these will help burn up some fat and help with any weight loss but so far nothing is any different, bit disappointed
Service rating: Good ..........
Product: .......................

Service rating: Excellent service. I have ordered from nutriseed before and been pleased. Too soon to tell whether the capsules are working or not but staying hopeful.
Product: Excellent service and delivery time
Excellent service I would use them again.
Service rating: Service was top notch. 2 days to delivery.
Product: Taking them twice a day. One in the morning and one in the afternoon. Keep me feeling full enough to not snack on junk while driving the van. Perfect to help me lose weight and cut out the junk.
Fast delivery. Exactly as stated.
Service rating: Excellent service. Fast delivery
Product: I'm eating a lot less with these and I'm less bloated
Service rating: Great service highly recommended. I will definitely be purchasing from Just Vitamins in the future as my #1 vitamin supplier.
Product: I wish I had known about this supplement years ago, it helps to fill your stomach with fibre and expands like a gel. This then helps for people who would like a gentle helping hand to lose some weight. And so far it has worked great....
Service rating: Easy website and the parcel arrived on time
Product: Good product. Helps with constipation
Service rating: I always use Just Vitamins for my supplements, good price and good service - always.
Product: I've used Glucomannan to add fibre to my diet and it does just that!
Service rating: Smooth transaction, good value, fast delivery, just make sure that you do your research into what you are buying and why, I am not saying that the products are of poor quality, but some products may not have the outcome that you want
Product: Wouldn't buy Glucomanna again, I was constipated for five days, threw the rest of them away, when I finally went to the toilet after taking stool softeners, it was a painful experience, I bought the product thinking it would help me loose weight, didn't really help only made me bloated

Frequently bought together