As a person gets older, the level of damage from free radicals in the body may increase, leading to cell damage and function problems.

This destructive effect often results from free radicals generated by the photocarcinogen.

The approach has come under fire from both conservatives and radicals for the purported value-neutrality.

Antioxidants protect the body from free radicals which can play a role in heart disease, cancer, and other conditions.

A leading theory on the origin of cataracts is that they arise through damage from free radicals.

To draw a clear line separating moderates from radicals is impossible.

But intelligence reports show that investigators were warning of an increased threat from Islamic radicals more than a year before the attack.

One of these involves damage from free radicals that circulate in the blood.

Vitamin E can protect brain cell membranes from free radicals.

So why doesn't the body protect itself better from free radicals and live longer?