<span>The answer to this question is no, everything that is ingested needs to be metabolised, unless it is a medicine specifically formulated for oral adsorption directly into the bloodstream, or in this instance the energy source is a ketonic monosaccharide. Because it is so small and a simple structure, it can enter the blood barrier directly and the body can then use this as energy.</span>
Radiation is responsible for the greatest loss of energy.
