Daily intake of 30g of resistant starch for 12 weeks increased beneficial bacteria and butyrate, reduced pro-inflammatory bacteria, and lowered blood glucose, insulin, and insulin resistance in older adults.

“Significant increase in Bifidobacterium in both middle-aged and elderly participants, with an increase in the beneficial microbiome byproduct butyrate, and reductions in Proteobacteria (including inflammatory Escherichia–Shigella) in the elderly.”