Consuming 20 percent of your total calories from protein equates to 400 calories a day based on a 2,000 calorie diet. As a general rule, between 10 percent and 15 percent of your total calories should come from protein. So, if you consume 2,000 calories per day, at least 200 should come from protein, or about 50 grams.
What is bioavailability? Bioavailability is the ease with which any nutrient can make its way from the food you eat into your body. The bioavailability journey that every nutrient takes is the same. In the first part of the journey, the food must be digested (broken apart) so that the nutrient can be freed from the food that contained it.
For example, whereas raw carrots and spinach are good sources of dietary fibre, cooking them allows the human body to also extract a much larger fraction of the carotenoids contained. 5. Minerals and other nutrients exist in different chemical forms in the food and this can influence their bioavailability.A classic example is iron. In general we talk about two types of dietary iron; haem and non-haem iron.nderstanding nutrient bioavailability helps optimise diets and set appropriate nutrient recommendations. Defining nutrient bioavailability. Several definitions exist for nutrient bioavailability, but broadly it refers to the proportion of a nutrient that is absorbed from the diet and used for normal body functions.