Biology

The practice of modifying or experimenting with one's own biology, using diet, technology, supplements, or other methods, to improve health, performance, or mental function outside of traditional medical systems.

A lack or shortage of something that is necessary for normal functioning or health; a fault or weakness in something.

The action of breathing out or expelling air from the lungs or a body cavity; in medicine, the forced removal of gas or fluid from a body space via suction.

The act of fortifying or strengthening; a defensive structure built to strengthen a position. In food science, it refers to the addition of vitamins or minerals to food to improve its nutritional value.