There are apparently just 3 major causes of skin aging, 3 total. First, there is wrinkles. Of course you want to use vitamin A to increase skin turnover, peptides to increase collagen and elastin production, and otherwise there are wrinkles to increase the ingredients lost as well as moisturizers to maintain smoother skin before you get wrinkles. Second, there is redness. I didn’t know this was a sign of aging.
But apparently, it’s because when you have rosacea which generally comes at about 30, you get red irritated skin, sensitive skin, thinner skin, and dilation of the capillaries. You should avoid foods that trigger flare ups such as spicy foods, limit sun and wind exposure, and use various bacterial killers and anti inflammatories. Finally, there are brown spots. Now most treatments only work to bleach these out, which results in lighter spots on the skin, which trust me looks just as bad.
But there are others that actually use regular wrinkle fighting ingredients like peptides and skin turnover ingredients such as retinol and there are others to get rid of these damaged and discolored cells in general. This will give you greater effects that you are looking for if of course you do it right. But these are the 3 majors signs of aging on your skin.