Sridevi Herbals Activated Charcoal Powder 100gHow does a charcoal mask really work? Activated charcoal draws bacteria, toxins, dirt and oil from the skin. If its a peel off mask, it also works as an excellent exfoliator, ridding the skin of dead cells. The end result is skin that is clean and clear. When used as a powder, charcoal masks can reach deep in your pores and suck out impurities with them.