My report was low on the fiber-fermenting, butyrate-making crowd. Butyrate is the short-chain fatty acid that feeds the gut lining and shows up in all the calm-gut research, so I ran a simple 6-week experiment: more resistant starch and a wider fiber base, ramped slowly so I didn't blow up like a balloon. Weeks one to two were gassy and honestly discouraging. By week three my regularity was the best it's been in years and my afternoon energy stopped crashing. I logged 'gut comfort' daily and the trend is unmistakable. Not magic — just consistently feeding the part of the ecosystem that was thin.