A balance between free radicals and antioxidants is necessary for proper physiological function. If free radicals overwhelm the body's ability to regulate them, a condition known as oxidative stress ensues. Free radicals thus adversely alter lipids, proteins, and DNA and trigger a number of human diseases.

Why are radicals harmful?

A balance between free radicals and antioxidants is necessary for proper physiological function. If free radicals overwhelm the body's ability to regulate them, a condition known as oxidative stress ensues. Free radicals thus adversely alter lipids, proteins, and DNA and trigger a number of human diseases.

Why are free radicals dangerous to cells?

Share on Pinterest Free radicals are unstable atoms. To become more stable, they take electrons from other atoms. This may cause diseases or signs of aging. ... The result is more free radicals, more oxidative stress, and more damage to cells, which leads to degenerative processes, as well as “normal” aging.