Bioavailability is a term that describes how much of a nutrient within a food can be absorbed by the body and while the specific amounts will vary from person to person, applying some of the concepts of bioavailability to daily diets can help us get the most out of the foods we eat. For example, the vitamin C in orange juice can dramatically increase the amount of iron that can be absorbed by the body from spinach. And, as we have noted before, some of the nutrients in raw vegetables are more easily absorbed with fats.
Does this mean that every time we eat a spinach salad it must be washed down with a glass of orange juice, or doused with a fatty dressing? No, but it does mean that making a few simple changes in diet can help us to make up for any nutritional deficiencies that we may have. A balanced diet doesn't have to be one that is totally functional in every respect (after all, a piece of pie and a scoop of ice cream serves little purpose other than making you feel good), but knowing how to keep your body functioning is never a bad thing.
