Sweating out toxins means getting rid of unwanted chemicals and heavy metals that accumulate in fat tissues. The innate knowledge of the body is amazing, the body knows to store toxins in the safest place and fat cells are the safest place. As a person lowers their toxic load, the amount of fat cells are reduced.
Drinking lots of filtered water is so important. When water moves through the body to hydrate the skin, muscles, soft tissues etc, the healthier the body is, and when having a sauna a person needs to drink water. This movement of fluids through the body flushes out what we don’t want. In the body is a gel-like medium that suspends and surrounds the cells called Interstitial Fluid. It transports substances through the body such as nutrients and oxygen. It is made of collagen fiber bundles, very small proteoglycan filaments, and water. As this fluid crosses thin membranes it changes form, becoming blood, lymph, cerebrospinal fluid, cellular fluid, or synovial fluid.
Ponder this when you are in the sauna sweating and sipping water, that you are staying youthful and keeping your body well-oiled at the cellular and microscopic levels. The intentional movement of the fluids through the body increases mobility and contributes to youthfulness throughout life.