You can get vitamin C through citrus fruits, but you can also
slather it on your skin to fight aging without irritating sensitive skin. THD ascorbate
is a new oil soluble derivative of vitamin C and can be found in products like Sunday
Riley C.E.O. C+ E Antioxidant Protect Repair Moisturizer. THD is great
because it soaks into your skin for a powerful, yet gentle, boost.