10.1523/jneurosci.20-03-01190.2000 186 LiX.ZhangW.XiaoM.WangF.ZhouP.YangJ.et al
Wolters M, Strhle A, Hahn A
Primary fat-soluble antioxidant in our skin Significant photoprotection against UVB rays Vit C + Vit E work in synergy and provide great photoprotection Has emollient properties Easy to formulate, stable and relatively inexpensive Retinol (pure Vitamin A) is probably the most proven anti-aging ingredient available OTC It has to be converted in the skin to retinoic acid to work its magic Once converted, it has the same effect as all-trans-retinoic acid, aka tretinoin A generally accepted ballpark number is that retinol is 10-to-20 times less potent than retinoic acid It makes skin less wrinkled, smoother, firmer and tighter It might also be helpful for acne prone skin as it normalizes keratinization and makes the pores produce less sebum Possible side effects and irritation are also much less than with retinoic acid Do not use whilst pregnant We don't have description for this ingredient yet

Particle accelerators and collider experiments have been set up to smash subatomic particles together: researchers hope to see unexpected amounts of energy missing from the resulting collision, which would suggest some unknown particle, possibly dark matter, is escaping the detector
Oocytes may spend decades in arrested meiotic prophase I, making them vulnerable to cumulative oxidative damage
Symptoms can have many causes