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Glucomannan Capsules - 500mg

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

47 reviews9810080
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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 - 47 customers have independently reviewed and recommend Glucomannan from 47 reviews
Review Date
Review Details
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
Great product range - good information. Arrived quickly with no issues
Service rating: Easy website to use speedy delivery and came through the letter box. Packaging is great!
Product: I wanted to try these to help me not over eat. I took the recommended dosage I still seemed to have over eaten on some occasions. I would say this product works but not as I was expecting.

I would like something to suppress my hunger as I didn’t fill the fullness after taking these tablets.

I’m disappointed they don’t work for me
Service rating: Speedy delivery, items exactly as described. Excellent service would definitely recommend.
Product: Have to take steroids from time to time and have put on copious amount of weight. This supplement does exactly what it says when combined with a calorie controlled duet and exercise. Have lost a stone in 30 days, absolutely delighted.
Excellent, speedy service
prompt and effficient and good quality.
Service rating: Emails kept me informed of order progress and delivery was fast.
Product: Taking it to help with weight loss and constipation.
Service rating: Fast service with really good prices. Really clear the benfit of each of your products as they are fully explained!
Product: Helps to keep my cravings for naughty things at bay and so far I have lost 2 1/2 stone since I started taking it in January
Just Vitamins Customer Service is excellent. Very helpful and knowledgeable staff. Helpful, efficient, professional and friendly.
Service rating: Worked well with my order
Product: An aide to losing a little weight
Service rating: Great service, very quick delivery!
Product: Really helped weight loss
Service rating: Always a worry when buying from a seller for the first time. I shouldn't have, smooth transaction and really great product. I can't recommend both seller and product highly enough.
Product: A miracle fibre that I have since found out is bring trialled for inflammatory bowel disease which I have. I won't be buying my usual fibre pysilium again
Service rating: Would definitely recommend as an aide to weight management
Product: Would definitely recommend as an aide to weight management
Product arrived well before it was expected
Quick and efficient
Service rating: Speedy delivery
Product: The glucomannan pills have done little for me in terms of feeling full. I didn't notice a change compared to then I didn't take them
My order was acknowledged promptly, packed well and delivered earlier that expected. Well done
Very quick prompt service, very good
Service rating: Excellent service as always. Thank you very much.
Product: Excellent product, can't fault it. In my option does exactly what it is suppose to do.
Fast delivery, got exactly what i wanted.
Simple and easy.
Service rating: I wouldn't think of getting my vitamins from anywhere else.
Good value and quick delivery.
Product: Great value good company to deal with with fast delivery
Service rating: Very good value for money. Prompt and efficient service.
Product: Has delivered exactly what the product description promised
great value product and this is a repeat order
Service rating: Quick efficient service. Good product and competitive price.
Product: Useful product to help with weight loss program. Will continue to use it as it really works.
Service rating: The service and delivery was excellent.
Product: Dissapointed they do not seem to be doing anything. They make me want to eat. Which is not what they are supposed to do. Put 2lb on after starting to use. Very dissapointed
Feedback Response: We're very sorry to hear that the supplement didn't help as part of your weight loss plan. We'll contact you directly to arrange a refund/ replacement.
Service rating: Quick delivery ans well pacckaged very pleased
Product: I've not been taking glucomannan long but I can see a change in my body already...which is better than standing on any scales!
Service rating: Delivered very fast
Product: Don't work , made no difference to my appetite
Feedback Response: Hi, I'm sorry to hear you are not satisfied with this supplement.
However, it is not supposed to work as an appetite suppressant, rather it can contribute to weight loss in the context of an energy-restricted diet.
Perhaps you may notice the benefits later.
Kind regards,
Just Vitamins Customer Team
Service rating: Great product, high quality.
Quick delivery.
I would recommend them, and will continue to use there products.
Product: Fantastic quality.
Great product.

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