[ detox ] the science of it
Deep sweating detoxifies through the sweating process by reducing levels of lead, copper, zinc, nickel, mercury and chemical toxins commonly absorbed just from our daily environments. Ninety-nine percent of what is left on the surface of your skin after sweating is water. The other one percent is an unnecessary and undesirable waste. Sweating even draws out lactic acid which can cause stiff muscles and fatigue.
Sweating can remove the build-up of heavy metals from your body. It would normally take your kidneys 24 hours or more to eliminate these metals.
Reducing heavy metals corrects metabolic imbalances that cause poor digestion and weight gain. Toxins that are stored in fat are decreased, making it easier to lose weight.
Our bodies are filled with lots of harmful toxins. Every single day we collect toxins from our food, our environment, and things that are all around us. While the body can dispose of some of these toxins, it cannot get rid of all of them without sweating.
Sweat can effectively eliminate almost thirty percent of all toxins built-up in the body. Because these harmful toxins can cause the skin to age quicker, sweat can actually help to slow down the aging process.

Read about the science behind skin care through sweating here.