lactic acid is one of the mild AHA content actually, than AHA glycolic acid. although mild at the beginning of use, my skin still feels the tingling at the time of use, but after the use to third times, I don't feel the tingling sensation again. langsre one of the AHA serums that dare me to mix with other active ingredients, because this AHA serum is quite moisturizing, there is no drying effect at all and also my skin can be tolerate without any sense of tingling. brightening effect, honestly I do not pay attention because I also using skincare with brightening effects. whiteheads was dry kalo rajin, then the skin feels more smoother, also quite helpful to fade acne scars PIH.
