Why we age is a fascinating question. Aging is a complex topic. Researchers have made great strides in understanding aging, but there is still much more to discover.
Multiple theories have been proposed to account for aging (20-30 are recognized by the National Institutes of Health.) There isn’t one definitive theory that accounts for aging. All of them play a role. The Free Radical Theory is the most widely known and accepted.
What’s important to know is that there are multiple causes of aging skin. An effective age-fighting plan must tackle the different mechanisms of aging, not just one.