There is currently zero credible research that shows a carnivore/keto diet will reduce inflammation in patients with IBD. The Mediterranean diet has some research showing potential improvement in patients, so if anything, suggest they talk to their doctor about that one. But don’t position it as a cure. There is currently no cure for IBD.
This is an extremely complicated disease and recommending that people try “cures” you heard about on podcasts is not helpful and potentially dangerous. It’s the same line of thinking that lead to people eating horse paste to cure their COVID.
The best thing someone with IBD can do is to find a good GI specialist that they trust and feel comfortable discussing potential medications and lifestyle adjustments with. Then when someone online recommends ”cures” like carnivore diet, they can take it to their doctor and discuss whether or not it might be worth trying given their specific medical circumstances.
Source: I built r/CrohnsDisease to 50k users