H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng th\u1ebf n\u00e0y: b\u1ea1n \u0111ang \u0111\u1ee9ng gi\u1eefa khu v\u1ef1c m\u1ef9 ph\u1ea9m ch\u0103m s\u00f3c da, ho\u00e0n to\u00e0n b\u1ed1i r\u1ed1i. M\u1ed9t b\u00ean l\u00e0 vitamin C \u2013 th\u00e0nh ph\u1ea7n lu\u00f4n \u0111\u01b0\u1ee3c \u01b0a chu\u1ed9ng, g\u1ea7n nh\u01b0 t\u1ecfa s\u00e1ng v\u1edbi nh\u1eefng l\u1eddi h\u1ee9a v\u1ec1 l\u00e0n da r\u1ea1ng r\u1ee1. C\u00f2n b\u00ean kia? \u0110\u00f3 l\u00e0 axit azelaic b\u00ed \u1ea9n, l\u1eb7ng l\u1ebd t\u1ef1 tin \u1edf g\u00f3c k\u1ec7 c\u1ee7a m\u00ecnh. N\u1ebfu b\u1ea1n t\u1eebng c\u1ea3m th\u1ea5y ph\u00e2n v\u00e2n gi\u1eefa hai \u201csi\u00eau sao\u201d n\u00e0y, tin t\u00f4i \u0111i, b\u1ea1n kh\u00f4ng h\u1ec1 \u0111\u01a1n \u0111\u1ed9c \u0111\u00e2u!T\u00f4i c\u00f2n nh\u1edb l\u1ea7n \u0111\u1ea7u ti\u00ean nghe v\u1ec1 axit azelaic \u2013 t\u00f4i ngh\u0129 n\u00f3 nghe gi\u1ed1ng nh\u01b0 m\u1ed9t th\u1ee9 trong s\u00e1ch gi\u00e1o khoa h\u00f3a h\u1ecdc, c\u00f3 th\u1ec3 l\u00e0m b\u1ecfng m\u1eb7t t\u00f4i. \u00d4i, t\u00f4i \u0111\u00e3 nh\u1ea7m l\u1eabn th\u1ebf n\u00e0o! C\u00f2n vitamin C th\u00ec sao? Ch\u00e0, ch\u00fang ta \u0111\u1ec1u bi\u1ebft m\u1ed9t ng\u01b0\u1eddi b\u1ea1n n\u00e0o \u0111\u00f3 lu\u00f4n tin t\u01b0\u1edfng v\u00e0o serum vitamin C c\u1ee7a h\u1ecd nh\u01b0 th\u1ec3 \u0111\u00f3 l\u00e0 v\u00e0ng l\u1ecfng v\u1eady. Nh\u01b0ng \u0111\u00e2y l\u00e0 c\u00e2u h\u1ecfi tr\u1ecb gi\u00e1 h\u00e0ng tri\u1ec7u \u0111\u00f4 la: lo\u1ea1i n\u00e0o th\u1ef1c s\u1ef1 x\u1ee9ng \u0111\u00e1ng chi\u1ebfm v\u1ecb tr\u00ed \u0111\u1eafc \u0111\u1ecba tr\u00ean k\u1ec7 ph\u00f2ng t\u1eafm c\u1ee7a b\u1ea1n?<\/p>