Glucomannan Multi: Ingredients, Dose and the Authorised Claims

Looking for a fibre supplement that does more than just keep things moving? Vitadefence Glucomannan Multi combines the well-researched soluble fibre glucomannan with a targeted blend of vitamins, minerals, and botanicals — including vitamin B6, chromium, green tea, and cayenne pepper. It's designed to support your daily routine when you're focused on weight management, energy metabolism, and overall nutritional balance.

Glucomannan is a soluble dietary fibre extracted from the root of the konjac plant (Amorphophallus konjac), native to East Asia. It's one of the most viscous dietary fibres known, meaning it absorbs water and expands in the stomach to promote a feeling of fullness (satiety). The food safety regulator (EFSA) has authorised a specific health claim for glucomannan: "Glucomannan contributes to weight loss in the context of an energy-restricted diet" when consumed at a daily intake of 3g in three doses of 1g each, together with 1–2 glasses of water before meals. The claim is based on a systematic review of randomised controlled trials.

Each serving (2 capsules) provides:

• Vitamin B6 (as pyridoxine hydrochloride) — 10mg (714% NRV)
• Choline (as choline bitartrate) — 8mg
• Zinc (as zinc gluconate) — 4mg (40% NRV)
• Chromium (as chromium picolinate) — 50µg (125% NRV)
• Iodine (from kelp extract) — 40µg (26% NRV)
• Glucomannan (Konjac) Powder — 1000mg
• Green Tea Extract — 1000mg (equivalent weight)
• Raspberry Fruit Extract — 600mg
• Siberian Ginseng Extract — 350mg
• African Mango Seed Extract — 200mg
• Cayenne Pepper Fruit Extract — 80mg
• Caffeine (anhydrous) — 50mg
• L-Tyrosine — 40mg
• Guarana Seed Extract — 40mg
• Citrus Aurantium (Bitter Orange) Fruit — 40mg
• Piperine (Bioperine, black pepper extract) — 3mg

Glucomannan Multi was created for people who want a comprehensive, all-in-one approach to weight management support — not just a single fibre. The formula pairs the satiety-promoting effects of glucomannan with:

• Vitamin B6 — contributes to normal energy-yielding metabolism and the reduction of tiredness and fatigue (the UK Nutrition and Health Claims Register).
• Chromium — contributes to normal macronutrient metabolism and the maintenance of normal blood glucose levels (the UK Nutrition and Health Claims Register).
• Iodine — contributes to normal thyroid function and energy metabolism.
• Green tea and caffeine — no authorised health claim.
• Piperine (black pepper extract) — 3 mg.

The dosage of glucomannan (1g per serving) aligns with the EFSA-recommended dose for the authorised weight management claim, and the formula is designed to be taken 2–3 times daily to reach the 3g threshold.

Glucomannan and weight management

The evidence for glucomannan's role in weight management is robust. Glucomannan contributes to weight loss in the context of an energy-restricted diet (3 g a day in three 1 g doses with 1–2 glasses of water before meals). The effect is attributed to its high viscosity, which delays gastric emptying and promotes satiety. The EFSA authorised claim requires a daily intake of 3g in three doses of 1g each, taken with water before meals, as part of an energy-restricted diet.

Vitamin B6, chromium, and energy metabolism

Vitamin B6 is a cofactor for over 100 enzymes involved in amino acid, carbohydrate, and lipid metabolism. The UK Nutrition and Health Claims Register confirms that vitamin B6 contributes to normal energy-yielding metabolism and the reduction of tiredness and fatigue. Chromium, as chromium picolinate, has been studied for its role in macronutrient metabolism and blood glucose regulation. Chromium contributes to the maintenance of normal blood glucose levels.:1605-1618).

Green tea and caffeine — traditional use only

The formula uses green tea extract at 1000mg per serving — a dose commonly used in clinical studies — but the evidence is not sufficient for an authorised claim under UK law.

Take 2 capsules, 2 or 3 times per day with water. For best results in line with the authorised health claim, take each dose with 1–2 glasses of water (at least 250ml) approximately 30 minutes before a meal. Do not exceed 6 capsules per day. Because glucomannan expands in the stomach, it's essential to drink enough water to avoid the risk of choking. If you have swallowing difficulties, consult your doctor before use.

Store in a cool, dry place, out of direct sunlight and away from heat sources. Keep the container tightly closed. Do not use if the seal is damaged. Best before date is printed on the base.

Glucomannan Multi is suitable for vegetarians and vegans. It is Kosher and Halal approved. The product is free from common allergens including gluten, dairy, soy, and nuts. However, it is manufactured in a facility that handles these ingredients, so trace amounts may be present. Always check the label if you have a severe allergy.

This product contains caffeine (50mg per serving, 100–150mg per day at maximum dose). It is not recommended for children, pregnant or breastfeeding women, or individuals sensitive to caffeine. If you have a thyroid condition, note that kelp extract provides 40µg of iodine per serving — this is within safe limits for most adults, but those on thyroid medication should consult a healthcare professional. People with swallowing difficulties should avoid this product due to the risk of choking. If you are taking medication for diabetes, blood pressure, or any other condition, speak to your doctor before use.

For a comprehensive approach to weight management and metabolic health, consider pairing Glucomannan Multi with:

• Herbal Multi — sugar beet fibre with botanicals. Read our guide.
• Magnesium Multi — magnesium contributes to normal muscle function and energy metabolism, pairing well with the B6 and chromium in this formula. Read our guide.
• Psyllium Husk Multi — psyllium husk with other plant fibres. Read our guide.

Can I take Glucomannan Multi if I'm on a low-carb or keto diet?

Yes. Glucomannan contains virtually no digestible carbohydrates, making it suitable for low-carb and ketogenic diets. The formula also includes chromium, which supports normal macronutrient metabolism.

Will Glucomannan Multi make me feel bloated?

Some people experience mild bloating or gas when first starting glucomannan, especially if they are not used to high-fibre supplements. Start with a lower dose (2 capsules once daily) and gradually increase to the full dose over 1–2 weeks. Drinking plenty of water helps minimise discomfort.

Can I take Glucomannan Multi with other supplements?

Yes, but take it at least 30 minutes before meals and separate from other supplements by at least 2 hours if possible, as glucomannan can slow the absorption of some nutrients. We recommend pairing with Herbal Multi or Magnesium Multi at a different time of day.

Is this product safe for long-term use?

Glucomannan has been used safely in studies for up to 16 weeks. For longer-term use, we recommend a break of 1–2 months after 3–4 months of continuous use. The vitamins and minerals in the formula are well within safe upper limits for daily use.

How does the caffeine content compare to coffee?

Each serving (2 capsules) contains 50mg of caffeine, which is roughly half the amount in a standard cup of brewed coffee (95–100mg). At the maximum dose of 6 capsules per day, you'd consume 150mg of caffeine — equivalent to about 1.5 cups of coffee. This is well within the safe daily limit of 400mg for most adults.

Can I open the capsules and mix the powder with water?

We don't recommend this. The HPMC capsule is designed to dissolve in the stomach and prevent the glucomannan from expanding too quickly. Opening the capsule could increase the risk of choking or cause the powder to clump in water.

Vitadefence is a UK-based brand committed to transparency, quality, and evidence-led formulation. Made in the UK to GMP quality standards. Glucomannan Multi is suitable for vegans and is Kosher and Halal approved.

Glucomannan Multi is a well-rounded, science-backed supplement for anyone looking to support weight management as part of a calorie-controlled diet. The inclusion of vitamin B6, chromium, and iodine adds genuine nutritional value, while the botanical blend (green tea, cayenne, guarana) provides traditional support. The formula is straightforward to use, vegan-friendly, and made in the UK to high standards. If you're ready to add it to your routine, buy Glucomannan Multi today. For more information on our shipping policy, click here.

This article is for educational purposes only and does not constitute medical advice. The product described is a food supplement and is not intended to diagnose, treat, cure, or prevent any disease. Always consult a healthcare professional before starting any new supplement regimen, especially if you are pregnant, breastfeeding, or have a medical condition. The health claims made for vitamin B6, zinc, chromium, iodine, and glucomannan are authorised under the UK Nutrition and Health Claims Register and are listed in the UK Nutrition and Health Claims Register. All other ingredients are included on a traditional use basis only.