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.
Vitamin D. Vitamin D aids the body's absorption of calcium. It is a a fat-soluble vitamin, meaning it is stored in the liver and fatty tissues. Vitamin D is essential for bone strength, hardness and growth, but is found in very few foods. The main source of vitamin D is sunlight, although it is added to some foods.f you take a supplement, try salmon over a leafy green salad to get both vitamins C and D with your calcium. A glass of vitamin D-fortified milk is another great way to get calcium in your diet. Not only does it pair calcium with vitamin D, but the lactase in the milk even helps your body absorb the calcium.