Generally, cells achieve its rejuvenation due to an increase of blood flow and since there is an increase in blood flow, increase oxygen distribution is also expected. Smoking cigarettes is one of the most detrimental bad habits someone can have. Beauticians always suggest applying an anti aging cream after the age of 30 because after crossing this age the face starts showing the effects of aging like dark circles, lines, wrinkles, age spots, sagging skin, and etc.