The idea that saunas help sweat out toxins is a common belief, but the reality is more nuanced.

What Science Says About Sweating and Detoxification

Sweat is mostly water (99%) with small amounts of salt, urea, and trace minerals. While some toxins (like heavy metals and BPA) have been detected in sweat, the amounts are minimal.

The liver and kidneys are the body's primary detoxification organs. They process and eliminate toxins through urine and feces, not sweat.

A 2012 review in Environmental International found that sweating can help excrete small amounts of heavy metals (like arsenic, lead, and mercury), but it's not a primary detox method.

A 2022 study in Toxins concluded that while sweat contains some environmental pollutants, the contribution to overall detoxification is minor compared to the liver and kidneys.

What Saunas Actually Do

Support circulation and lymphatic flow, which may help the body transport waste products more efficiently.

Promote relaxation and stress reduction, which can indirectly support metabolic processes, including detoxification.

Aid in muscle recovery and cardiovascular health, but not necessarily by sweating out toxins.

Bottom Line

Saunas don't significantly detox the body, but they offer other health benefits like improved circulation, relaxation, and cardiovascular support. The best way to detox is through proper hydration, a healthy diet, and supporting liver and kidney function.