I have a not so nice skin... meaning I have a lots of blemishes in my face, arms and other parts of my body. My friend recommend me to take Metathione,she told me that it's very effective not just in whitening the skin but it also have a lots of benefits it can give. But I'm afraid for what will be it's effects to me,I believe that all medicines have disadvatages. I'd like to know what's it's disadvantages? And If ever I will take it, how much dosage? I am 5'2 and 50kgs.