Oats are rich in beta-glucan, a soluble fiber that positively affects blood glucose through short-chain fatty acid production.

“So for example, oats are packed with beta glucan which is a soluble gel forming fiber that's also fermentable by the gut biome. So when you eat oats, you're getting insoluble fiber from cellulose. and then the betalucan and you're getting both gel formation and the fermentation driven prebiotic effects that make those short-chain fatty acids which also have a positive and favorable effect on blood glucose.”