RS1 resistant starches are physically inaccessible to digestive enzymes and are found in whole grains, seeds, legumes, and other minimally processed, high-fiber foods.

“So, RS1 are the starches that are physically inaccessible to digestive enzymes in the GI tract. um they're typically found in whole grains, seeds, legumes, um and other minimally processed foods, uh that are high in fiber.”