Psyllium

The carnivore diet eliminates dietary fibre, raising concerns about bowel function, gut microbiome diversity, and long-term digestive health. This article examines the evidence for and against fibre supplementation on a carnivore diet, what the microbiome research shows, and practical options for those committed to the diet.

UK SACN recommends 30g/day dietary fibre; average UK adult intake is 18g/day. Supplements can bridge this gap. Psyllium, glucomannan, and beta-glucan have the most evidence. Glucomannan has an EFSA-authorised weight management claim at 3g/day. This article covers which types work, at what dose, and for what purpose.