Keto Pro Slim There are different factors that affect bioavailability , for example, "the concentration of nutrients ingested at one time: the higher the concentration ingested, the lower the body's efficiency to process them," says the specialist. It also affects the chemical form of the nutrient, the cooking method or the vital physiological moment. In this sense, Baladia tells us that, for example, "during growth there is maximum efficiency, or during pregnancy and lactation the body is able to process more nutrients from the same amount of food."