Glucomannan is a plant-based fibre supplement clinically recognised to support weight management when taken alongside a calorie-controlled diet. Glucomannan 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 of glucomannan with chromium and green tea extract
Helps you feel fuller for longer- reducing calorie intake naturally
“Glucomannan is one of the few fibre supplements with an approved European health claim for weight management. When taken at the right dose alongside a healthy diet, it can be a practical and accessible tool for people looking to take the first step.”
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 to create 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
Take up to three times daily (maximum 3g per day)
Always drink plenty of water to help the fibre expand safely
If you take other medications, leave a 30–60 minute gap before taking glucomannan
Do not exceed the recommended daily dose
It is essential to take glucomannan with a sufficient amount of water. Taking without adequate fluids may cause the capsule to swell before it reaches the stomach. Not suitable for children under 12, or for those who have difficulty swallowing.
Glucomannan is suitable for most adults who are looking to manage their weight through appetite control. It may be particularly helpful if you:
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, or have any digestive conditions.
Glucomannan is generally well tolerated. Because it is a dietary fibre, your digestive system may need a short adjustment period. Common mild effects include:
These effects usually settle within the first 1–2 weeks as your body adjusts. Drinking plenty of water helps reduce discomfort. If symptoms persist, stop use and consult a healthcare professional.
If you have any questions about taking glucomannan, our clinical team is here to help.
Glucomannan is coming soon to Phlo Clinic. In the meantime, explore our full range of clinically supported weight loss treatments.
From clinically approved prescription medications to accessible supplements, we’re here to help you find the right approach for your goals.
