The rise of “fibremaxxing,” a social media-driven trend advocating extreme fibre consumption, has sparked concerns among health experts, warns Lewis Mattin of the University of Westminster. While dietary fibre is essential—UK NHS guidelines recommend 30g daily for adults, less for children—most Britons fall short, with over 54% of adult calories and 66% of teenage calories coming from low-fibre, ultra-processed foods (UPFs). These foods, high in sugar, salt, and unhealthy fats, displace fibre-rich whole grains, vegetables, and nuts, contributing to widespread nutrient deficiencies.

Fibremaxxing, which encourages intakes of 50-100g daily, often involves replacing proteins, carbohydrates, and fats with fibre-dense foods or supplements. However, no robust human studies support long-term fibre consumption above 40g daily. Rapidly increasing fibre, especially without adequate water, can cause bloating, cramping, constipation, and gas, while potentially impairing absorption of critical micronutrients like iron and macronutrients needed for energy and bodily functions.

Fibre’s benefits are well-documented: it promotes digestive health, regulates blood sugar, lowers LDL cholesterol, aids weight management, and reduces colon cancer risk. Yet, experts urge moderation, recommending gradual increases through natural sources like wholegrain bread, lentils, apples with skin, and seeds. Mattin advises adhering to NHS guidelines, warning that excessive fibre from powders or supplements could negate benefits and disrupt health.

A balanced approach to fibre intake remains key to avoiding the pitfalls of this trending fad.

Also Read: Your Guide to Vitamins A-K: Sources and Benefits