Most UK adults should aim for around 30g of fibre a day. The average person gets closer to 20g, so there is a real gap for most of us. Fibre keeps you fuller for longer, feeds your gut bacteria, steadies blood sugar and keeps digestion regular, which makes it one of the easiest wins in everyday eating. Here is the target and how to hit it without overhauling your diet.
The daily fibre target
The UK guideline is 30g a day for adults. Children need less, scaling up with age. It is a target most people miss not because fibre is hard to find, but because refined foods (white bread, low-fibre cereals, snacks) crowd it out.
| Group | Fibre a day |
|---|---|
| Adults | 30g |
| Ages 11 to 16 | 25g |
| Ages 5 to 11 | 20g |
| Under 5 | 15g |
Why fibre matters
- Fullness. Fibre slows digestion, so high-fibre meals keep you satisfied per calorie, which quietly helps with a calorie deficit without counting.
- Gut health. Certain fibres feed your gut bacteria, the basis of a lot of everyday gut-friendly eating.
- Steadier energy. It blunts blood-sugar spikes, so you avoid the slump-and-snack cycle.
- Regularity. The unglamorous but important one.
Easy ways to get more
You do not need supplements. Small swaps stack up fast:
- Switch to wholegrain bread, pasta and rice. Often +3 to 5g a meal.
- Leave skins on potatoes, apples and pears.
- Add a tin of beans, lentils or chickpeas to soups, stews and salads. A half tin can add 7g.
- Front-load breakfast with oats or a high-fibre cereal instead of a low-fibre one.
- Snack on fruit, nuts or popcorn rather than crisps.
- Keep some veg in every meal, frozen counts.
A day that hits 30g might look like: porridge with berries, a wholemeal sandwich with salad, an apple and a handful of nuts, and a dinner with beans or wholegrains and veg. Not a diet, just defaults.
Ramp up gently
Going from 20g to 40g overnight can leave you bloated. Add a few grams every few days and drink enough water, your gut adapts within a couple of weeks.
See your fibre add up
forme tracks fibre as part of your day and leans your food score towards filling, less processed choices, so hitting your target happens without the spreadsheet.
How forme helps
If a kinder gut or more fibre is one of your goals, forme weights your food score towards higher-fibre, less processed choices and tracks fibre across your day against a sensible target. So the foods that close the gap are the ones that score well for you, no tallying required.
The bottom line
Aim for about 30g of fibre a day, build up gradually, and lean on wholegrains, beans, fruit, veg and nuts to get there. It is one of the simplest, highest-return changes you can make. This is food guidance to help you reach your own goals, not medical or dietary advice.