What is butyrate, and why your gut runs on it
The short answer
Butyrate is a short-chain fatty acid (SCFA) produced when gut bacteria ferment dietary fibre in your colon. It's the main energy source for colonocytes — the cells lining your large intestine — which take an unusual amount of their fuel from butyrate rather than glucose.
Why that's a big deal
Classic work showed colonocytes preferentially oxidise butyrate for energy — in isolated colon cells, butyrate alone accounted for ~86% of oxygen consumption (Roediger, Gastroenterology, 1982). Later research in germ-free mice — animals with no gut bacteria and therefore no butyrate — found their colon cells were energy-starved and shifted into autophagy, a stress state that reversed when butyrate was restored (Donohoe et al., Cell Metabolism, 2011). Without fibre fermentation, the gut lining runs low on its preferred fuel.
How your body makes it
You don't eat butyrate in meaningful amounts — you grow it. Fermentable fibres like resistant starch, inulin and pectins reach the colon intact, where bacteria ferment them into SCFAs including acetate, propionate and butyrate (SCFA review, Frontiers in Immunology, 2019). Fibre that gets digested earlier never makes it far enough to feed this process.
Not all fibres are equal butyrate-drivers
Resistant starch is among the more butyrate-favouring fibres, while others feed different bacteria or produce more acetate. Because no single fibre ferments along the whole colon, different fibres ferment at different rates and locations — so fibre variety is a reasonable way to support fermentation across more of the gut rather than one short stretch.
How to support your own butyrate
There's no shortcut around fibre: eat a variety of plant fibres, include resistant starch (cooled cooked potato or rice, legumes, green banana), and build intake gradually so fermentation stays comfortable.
The evidence above is about dietary fibre and butyrate biology in general, not about any specific product.
Buta-8 is named for butyrate and includes resistant starch alongside three other fibre classes. Explore the blend →
References: Roediger, Gastroenterology 1982; Donohoe et al., Cell Metabolism 2011; Frontiers in Immunology SCFA review 2019.