What is a Radical Pair?

An external field only influences radical pairs, generally by slowing down processes that require a change of spin. When a magnetic field is applied, less radicals can change their spin and more succeed in separating from their partner. The consequence of this is that, on average, radicals live longer and their overall concentration increases when a field is applied.

Above Diagram - schematic representation of the radical pair interconversion process. Source: Ritz et al, 2000.

What are the Dangers Posed by Radical Pairs in the Human body?

Given the recognized importance of free radicals on a wide range of biological processes, from aging to cancer, there is little doubt that any external agent that can influence free-radical behaviour can have health consequences for the human body.