Fibre Supplements: The Overlooked Key to Digestive Health

Despite being one of the most important nutrients for overall health, fibre is chronically under-consumed. The average UK adult eats only 18 grams per day — well below the recommended 30 grams.

Fibre is the indigestible part of plant foods that passes through your digestive system largely intact. Far from being useless, it performs several critical functions:

• Insoluble fibre adds bulk to stool.

Soluble fibre dissolves in water to form a gel-like substance. Found in oats, beans, apples, and psyllium husk.

Insoluble fibre does not dissolve in water. Found in whole grains, vegetables, and wheat bran.

Psyllium husk is a widely used fibre.

Inulin and FOS are prebiotic fibres that specifically feed beneficial Bifidobacteria in your gut. They're effective but can cause gas and bloating if introduced too quickly.

If you're not used to a high-fibre diet, increase your intake gradually over 2-3 weeks. Drink plenty of water, as fibre absorbs liquid. Starting with 5-10 grams of supplemental fibre per day and building up is a sensible approach.

Different types of fibre serve different purposes, so choosing the right one matters:

• Psyllium husk: a soluble fibre that forms a gel with water.
• Inulin and FOS (fructooligosaccharides): Prebiotic fibres that feed beneficial gut bacteria. Excellent for supporting microbiome diversity. Start with small doses as they can cause gas and bloating initially.
• Less likely to cause bloating than inulin or psyllium.
• Glucomannan in the context of an energy-restricted diet contributes to weight loss (3 g a day in three doses of 1 g, with 1-2 glasses of water, before meals).
• Methylcellulose: A non-fermentable fibre that does not produce gas. Good for those who experience bloating with other fibre supplements.

Start with a low dose and increase gradually over 1–2 weeks to allow your gut to adapt.

Fibre supplementation may be particularly beneficial for:

• Anyone not meeting the recommended 30 grams of fibre per day (the average UK adult consumes only about 18 grams)
Anyone eating less than the NHS's 30 g a day.

Always drink plenty of water with fibre. Increase fibre gradually (add 5 grams per week) to minimise bloating and gas as your gut bacteria adjust. Take as directed on the label. Space fibre supplements at least 2 hours away from medications, as fibre can reduce drug absorption. Complement supplemental fibre with whole food sources: beans, lentils, oats, berries, broccoli, and whole grains. Aim for a mix of soluble and insoluble fibre for complete digestive support.

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This article is for informational purposes only and does not constitute medical advice. Vitadefence supplements are food supplements, not medicines. Consult a healthcare professional if you are pregnant, breastfeeding, on medication, or have a medical condition.