Activated charcoal is a black, odorless, flavorless powder that has been used since ancient times to treat various ailments. It is charcoal that has been treated with oxygen at very high temperatures to make it more porous. This treatment changes its internal structure, reducing the size of its pores and increasing its surface area

Activated charcoal is thought to offer several other benefits, including less gas and flatulence, lower cholesterol levels, and improved kidney function. Some people claim that it helps whiten your teeth, filters water and even cures hangovers.