The full transcript of Kervran's Biological Transmutations and Modern Physics is available at Rex Research .

Basically, biological transmutations is the name given to anomalous changes in the quantities of certain kinds of atoms in living systems. The French scientist Corentin Louis Kervran was the most prolific writer on the subject.

The phenomenon is regarded as crackpottery in most circles. But biological transmutations are, unlike things like psi phenomena, UFOs, or free energy devices, perfectly plausible physical processes which, if real, could be integrated into mainstream science.