I agree. Skin doesn't regenerate that fast. A product needs at least a couple of weeks (sometimes months) to show results. Some time is required even when lasers are used to break pigment in melasma (i might be wrong but I think it's two weeks not one).
Whooooa! That's overkill! You don't need alpha arbutin if hydroquinone is already there. Alpha arbutin is a weak derivative of hydroquinone and it has the same mechanism of blocking tyrosinase as HQ, so why do you need both? Vitamin e has nothing to do with skin lightening.
@Dtdang, may I ask if you bought ethyl ascorbic acid from a retailer (DIY quantity)? I can’t find it anywhere. Sorry for off topic.
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