Why GPs keep mentioning fibre
Low fibre intake is linked in population studies to higher risks of heart disease, type 2 diabetes and some bowel conditions. Soluble fibre (oats, beans, apples) helps cholesterol; insoluble fibre (whole grains, skins, stalks) adds bulk and speeds transit.
Fibre also feeds the microbiome - the trillions of bacteria in your colon. A varied plant intake supports more diverse bacteria, which may influence inflammation, immunity and even mood (research is evolving, but the direction of travel favours plants).
You do not need to count every gram to benefit - shifting the pattern of the week is enough for many people.
Increase gradually - your gut will thank you
Jumping from very low to very high fibre overnight commonly causes bloating and wind. Add one win per week: lentils in mince, beans in soup, peas in pasta, frozen spinach stirred into curry, an extra vegetable at lunch.
Drink water as fibre rises - fibre needs fluid to work comfortably.
If you have IBS, some high-fibre foods are also high FODMAP - a dietitian can help you balance fibre goals with symptom control.
Aim for variety - different plants feed different bacteria.
Wholegrain swaps work best when the rest of the plate still has vegetables and protein.
Tinned pulses are cheap; rinse if you are watching salt.