
Glucomannan is a plant-based fibre supplement clinically recognised to support weight management when taken alongside a calorie-controlled diet. These capsules combine konjac-derived fibre with chromium and green tea extract to help reduce appetite and support healthy, steady progress.
EFSA-approved health claim for weight management
Clinically effective dose with chromium and green tea extract
Helps you feel fuller for longer, reducing calorie intake naturally
UK-licensed supplement
Glucomannan is a natural dietary fibre extracted from the root of the konjac plant — a staple of Asian cuisine for centuries. It works by absorbing water in your stomach, expanding into a gel-like substance that helps you feel full.
When taken before meals with a full glass of water, glucomannan can reduce appetite and support portion control. Over time, this can contribute to a steady, moderate reduction in body weight — particularly when combined with a calorie-controlled diet and regular activity.
The European Food Safety Authority (EFSA) has approved glucomannan as one of the few fibre supplements with a recognised health claim for weight management in overweight adults, at a daily dose of 3g.

A water-soluble fibre that expands in the stomach, supporting feelings of fullness and helping to reduce calorie intake before meals. Can absorb up to 50 times its weight in water.
Contributes to the maintenance of normal blood glucose levels and helps reduce cravings, supporting more consistent energy throughout the day.
A natural source of antioxidants and a gentle metabolic supporter to complement your weight management routine.
Take 1g with a full glass of water (at least 250ml), 30 minutes before each main meal, up to three times daily (maximum 3g per day). Always drink plenty of water so the fibre expands safely, and leave a 30–60 minute gap from other medicines. It is essential to take glucomannan with enough water — taking it without adequate fluids may cause the capsule to swell before it reaches the stomach. Not suitable for children under 12 or those who have difficulty swallowing.
Glucomannan is generally well tolerated. As a dietary fibre, your digestive system may need a short adjustment period. Common mild effects include bloating or mild gas, temporary stomach discomfort, and changes in stool consistency. These usually settle within the first 1–2 weeks. Drinking plenty of water helps; if symptoms persist, stop use and consult a healthcare professional.
Glucomannan is not suitable if you are pregnant, breastfeeding, or under 12. Speak to your GP before use if you have diabetes, take blood sugar medication, have a swallowing difficulty or bowel obstruction, or have any digestive conditions.
Glucomannan is suitable for most adults looking to manage their weight through appetite control. It may be particularly helpful if you:
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Glucomannan is a natural dietary fibre extracted from the root of the konjac plant. Taken with water, it expands in the stomach and creates a feeling of fullness, which can help reduce calorie intake. It is one of the few fibre supplements with an EFSA-approved health claim for weight reduction in overweight adults.
It absorbs water and expands to form a gel-like substance, slowing digestion and promoting fullness before and during meals. Feeling less hungry can help you consume fewer calories, supporting gradual weight loss — best combined with a calorie-controlled diet and regular activity.
Clinical studies suggest modest weight loss of around 1–5kg over several weeks to months, depending on your diet, lifestyle and consistency. It's not a quick fix — results are gradual and work best as part of a broader approach.
Take 1g with at least a large glass of water (250ml or more), 30 minutes before each main meal. The maximum daily dose is 3g. Always take it with plenty of water, and leave a 30–60 minute gap from other medications.
Yes, it's considered safe for daily use at the recommended 3g per day and is EFSA-approved for weight management. Most people tolerate it well. If you have an underlying condition or take regular medication, speak to your GP or pharmacist first.
Because it's a fibre supplement, some people get mild digestive effects when starting — bloating, gas or changes in bowel habits — usually settling within 1–2 weeks. Drinking plenty of water helps. If symptoms are persistent or severe, stop use and consult a healthcare professional.
Most clinical studies run for 8–12 weeks and show small but meaningful weight reductions. Some people notice a difference in appetite within the first few weeks. If you've noticed no change after 2–3 months, it's worth reviewing whether this is the right approach for you.