Government guidelines recommend adults get 30g of fibre a day, but this is too much for a supplement, as fibre is also found in a wide variety of foods.
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How much you need will depend on your diet but never exceed the dosage on the pack. Bear in mind that more than 40g per day of fibre from all sources can interfere with the absorption of other nutrients and some medication.12
Fibre supplements are generally safe to take, but can reduce the effectiveness of certain drugs, including anti-depressants, certain antibiotics, and diabetes drugs, so talk to your doctor before taking.13
Also talk to your doctor first if you have digestive, gut or bowel issues, including:13,6
- A history of bowel blockage
- Crohn’s disease
- Problems swallowing or a narrowing of your gullet
- Unexplained changes in your bowel habits for longer than two weeks
- Unexplained bleeding from your back passage
- Problems passing stools despite taking laxatives