Bioavailability Factors refer to the added digestive enzymes (bromelian) and probiotics (GUT5Y) we’ve included in the formula to assist with digestion and absorption. Bromelain—is a digestive enzyme derived from pineapple stems that helps to break down the complex collagen structure into simple amino acids, making the formula more bioavailable, or more easily absorbed by the body for optimum usage.  Lactobacillus rhamnosus GUT5Y— is our exclusive probiotic strain that contributes to digestive wellbeing and skin health.