What is fibremaxxing?
Fibremaxxing is the 2026 name for something dietitians have said for years: most people in the UK do not eat enough fibre, so they try to raise it on purpose.
The NHS target for adults is 30g a day. National surveys keep showing that around 96% of us miss it. Average intake sits closer to 16–18g. See how much fibre per day for the plain numbers.
The useful version of fibremaxxing is not powders and 80g days. It is beans, oats, fruit with skins, wholemeal bread, and a bit of patience. Jumping overnight from 15g to 40g is how you get bloated and quit.
Use the 30g tracker with supermarket portions, browse high fibre foods UK, or follow the one-day UK meal plan. Drink water as you add fibre. This site is not medical advice.
If you have a bowel condition, are on a restricted diet, or fibre has made you unwell before, speak to a GP or dietitian before you change much.
Common questions
What is fibremaxxing?
Deliberately raising your daily fibre intake. In the UK most adults eat around 16–18g while the NHS target is 30g.
What is the NHS fibre target?
About 30g of fibre per day for adults.
How should I increase fibre safely?
Add one high-fibre swap a week, drink water, and avoid jumping from a low intake to very high grams overnight.
Is Gutmaxx medical advice?
No. Gutmaxx is a free portion tracker with estimates. Check pack labels and speak to a GP or dietitian if you have a bowel condition.