GutMaxx is a free UK tool that helps people reach 30g of fibre a day using food they can actually buy in UK supermarkets. Most adults in the UK eat around 18g of fibre a day, well under the 30g recommendation, and it is hard to know which everyday foods close the gap. GutMaxx makes that simple.

The site lists hundreds of supermarket foods from Tesco, Sainsbury's, Asda, Waitrose, Aldi, Lidl, Morrisons and Ocado, with fibre and protein per serving, so you can compare porridge oats, wholemeal bread, beans, lentils, seeds, fruit and snacks side by side. Each food has its own page with clear numbers and plain-English guidance, and there are practical guides such as how much fibre you need per day, what fibremaxxing means, and high-fibre foods in the UK.

Key features include a free 30g fibre tracker and daily log, a UK meal plan builder that adds up fibre across breakfast, lunch, dinner and snacks, and a dedicated section for people on Mounjaro and other GLP-1 medicines who want to keep fibre and protein up while eating less, including help with constipation.

Who it is for: anyone aiming to eat more fibre, people managing digestion, people on weight-loss medication, and shoppers who want quick supermarket-specific answers instead of generic nutrition advice.

Pricing: GutMaxx is completely free to use, with no account required to browse the food pages and guides. Use cases include planning a weekly shop, checking whether a favourite food is high in fibre, swapping low-fibre staples for better options, and building a realistic day of eating that reaches 30g. The information is educational and is not medical