This term specifies to what extent various micronutrients in food are absorbed and become available to their target tissues or organs after eating. In other words, it is not a matter of what is consumed, but what the body is able to absorb and assimilate from the foods ingested It is a measurement of the reaches the systemic circulation and is available at the site of actionThere is a variety of factors that can influence bioavailability, such as ageing, food processing, reduced digestive secretions, shortage of enzymes in the body, and nutrient interaction - in which some nutrients inhibit or increase absorption of other nutrients. It is one of the essential tools in pharma cokinetics, as bioavailability must be considered when calculating dosages for non-intravenous routes of administration.Inadequate time for amalgamation in the GI tract is a common cause of low bioavailability. If the drug does not melt readily or cannot enter the epithelial membrane time at the amalgamation site may be inadequate. It can also affect drug bioavailability such as era, gender, substantial activity, hereditary phenotype, anxiety, disorders and earlier gastric intestinal surgery

Micellized vitamin E gives both the maximum serum point as well as the maximum red blood cell membrane level. It is the skill of a nutrient to be elated to, and engrossed by, the cells of the body. The Bioavailability is useful for bacteria in the gastrointestinal tract. It is basis in iron from meat and spinach and hence more iron found in meat than spinach . Bioavilability is useful in mental conditions such as seizures patients .