How do anti-aging skin products generally work?

Regenerate skin: They peeled of "old" skin, regenerate "new" skin. They stimulate new collagen devlopment at the level of dermis.

Retinoids : Most over the counter products advertised as ‘anti-wrinkle creams’ usually do no more than moisturize the skin. By drawing water into the top layer of the skin (stratum corneum), it swells and plumps up, reducing signs of wrinkles. Retinoids, on the other hand, have been proven to even skin tone, repair minor sun damage, and rebuild collagen. It increases skin cell turnover to treat wrinkles.

Anti-Aging: Anti-aging skin products generally work by unclogging pores, boosting collagen to reduce fine lines, and speeding up cell turnover to even out discoloration and smooth the skin.