Myra E300 / E400 is this really good for women?

Hi my fellow mylotters. For women who take vitamin E. I would like to ask you if Myra E300 and E400 is really good for us women in the 20s. They say we need this for our skin. Right now im taking Myra E300 and im wondering the difference with Myra E400 but anyway i would like to ask how much we need this vitamin E? What can it do for us? thanks