i think it is good when used as setting loose powder. method: cleanse, tone and moisturize face, and then apply liquid foundation or two-way cake, after that, apply this vitamin powder on top of the makeup. it will help your face makeup last longer by reducing the oil secretion on your face. i found out that if i do not apply this powder, my makeup will "melt" after 4 hours and look messy. so do not skip using this as setting loose powder. moreover, i do not use it at night because i think it is not effecti