How much fibre does the UK eat? 16g a day, against 30g

UK adults aged 19 to 64 eat an average of 16.4g of fibre a day, against a recommended 30g, and only 4% reach the target. The gap of about 14g is roughly baked beans on two slices of wholemeal toast, with a portion of broccoli on the side.

That is the whole problem in one sentence. The rest of this page is where the number comes from and what closing the gap looks like on an ordinary British plate.

Where does the 16g figure come from?

From the National Diet and Nutrition Survey, the government’s own measure of what the country eats, in its report published on 11 June 2025. The fieldwork ran from 2019 to 2023, with people recording everything they ate and drank on four separate days, and giving blood and urine samples.

Average daily fibre came out at 16.4g for adults aged 19 to 64, 16.9g for those aged 65 to 74, and 16.4g for those aged 75 and over. Across all adults, 4% met the recommendation of 30g a day. Put another way, 96 adults in every 100 are under it.

These are averages, so plenty of people sit above and below them. If you eat porridge most mornings and beans a few times a week, you may already be well past 16g.

Why do other pages say 18g, 19g or 20g?

Different pages carry different figures, and the newest survey came in lower than most of them. The NHS fibre page says most adults eat about 20g. The British Dietetic Association’s fact sheet says 18g, and Guts UK gives 19g for adults aged 19 to 64. The British Nutrition Foundation already uses about 16g.

None of them is wrong about the direction. On any of those figures, the average adult is eating somewhere between a little over half and two thirds of what is recommended. I use 16.4g because it is the most recent national figure and it comes straight from the survey rather than from a summary of it.

What does 30g of fibre look like in a day?

Less dramatic than it sounds. The NHS gives an example day that reaches it with no specialist food at all.

There is no bran, no seeds sprinkled on everything and no powder. The fibre comes from three swaps most kitchens could make: wholemeal bread instead of white, wholemeal pasta, and potatoes with the skins left on. The lentils in the sauce and the vegetables at dinner do the rest.

What does the 14g gap look like on a plate?

Here are two ways to add about 14g to a day, using the fibre amounts in the British Dietetic Association’s food tables.

The first is one meal. Two slices of wholemeal bread carry about 7g, 100g of baked beans about 4.9g, and 100g of boiled broccoli about 2.8g. Beans on wholemeal toast with broccoli on the side comes to about 14.7g.

The second spreads it across the day. Porridge made with 50g of oats is about 4g, a 180g baked potato about 5g, and 100g of boiled peas about 5.6g. That is about 14.6g, without any one meal changing much.

One honest caveat. These amounts are added fibre only if the food is new to your day. If you already eat two slices of white toast and swap them for wholemeal, you gain the difference between the two, not the full 7g. The label on the bag tells you the fibre per slice, and high fibre versus source of fibre explains what the wording on the front of the pack has to mean.

Why bother closing the gap?

Fibre keeps things moving. It adds bulk and softness to what passes through, which is why more of it is part of the standard NHS advice for constipation. Eating plenty of fibre is also linked with a lower risk of several long term conditions, heart disease and bowel cancer among them.

It feeds the bacteria in your large bowel too. Some fibres reach the bowel undigested and are fermented there, and the bacteria turn them into short chain fatty acids that nourish the cells lining the bowel. Counting different plants is one way of getting a wider range of fibres in, and the 30 plants a week checklist is the practical version of that.

How do I add fibre without bloating?

Slowly, and with more to drink. Fibre that arrives faster than your gut is used to tends to mean bloating and wind, and fibre needs fluid to do its job. Adding one higher fibre food a week, rather than rebuilding every meal at once, is the gentler way to do it, and the reasons are in why more fibre made your bloating worse.

If you have a diagnosed gut condition, ask your GP or dietitian before you change how much fibre you eat. And if you are not sure whether fibre, plants or something else is the place to start, the which book quiz takes about a minute.

When it is not about fibre

Some changes need a GP before they need a food plan. The NHS says to see a GP if you “have blood in your poo”, “have lost weight without trying” or are “regularly bloated”. If you notice a sudden change in how you poo, book an appointment rather than adding fibre and waiting to see what happens. If you feel seriously unwell, call NHS 111.