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sauna sweat isn't just water. researchers have detected heavy metals, BPA, phthalates, and other synthetic compounds in human sweat, some at concentrations higher than in urine. here's what the peer-reviewed research actually found.

juice cleanses, detox supplements, and colon cleanses are a multi-billion dollar industry. the NIH, FDA, and FTC say the science isn't there. here's what the research actually shows, and what your body was already doing without them.

most people go to the sauna to sweat out toxins, but what you wear, what's on your skin, and what you do with your sweat can quietly work against you. here's how to get the most out of every session, backed by actual research.