Cold Plunge Podcast

Do We Sweat Out Toxins in the Sauna?

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The sauna is a popular wellness tool, lauded not only for its relaxing effects but also for its ability to detoxify the body. In this episode, we discuss how sweating can flush out various unwanted substances, including heavy metals and phthalates.

Understanding Sweating

Sweating is primarily a thermoregulatory response, meaning its main purpose is to help regulate body temperature. When the body’s internal temperature rises, sweat glands release moisture that cools the body as it evaporates. This process is essential for preventing overheating, but it also has some secondary effects.

Can You Sweat Out Toxins?

The term “toxins” is broad and can refer to many different substances. For the purpose of this discussion, we’ll focus on heavy metals and phthalates. Heavy metals, such as lead and mercury, can accumulate in the body and have various adverse health effects. Phthalates are chemicals used to make plastics more durable and are also linked to several health risks.

Studies suggest that while most detoxification happens in the liver and kidneys, certain elements, including some heavy metals and phthalates, can indeed be excreted through sweat. For instance, a 2016 study published in the Journal of Environmental and Public Health observed that sweat could contain trace amounts of metals like arsenic, cadmium, lead, and mercury. Another study highlighted that phthalates, too, could be expelled from the body through sweating.

Study showing excretion of heavy metals through sweat:

Study showing phthalates get excreted through sweating:

Comparison of Elimination of Metals through Sweat and Urine

The chart below shows the comparison between how heavy metals are eliminated by comparing sweat to urine:

Comparison of Elimination of Metals through Sweat and Urine

The Limitations of Sweating as Detoxification

The effectiveness of sweating out toxins can vary significantly between individuals. Factors such as body composition, metabolic rate, and individual sweat gland activity all play roles in determining how much one can “detox” through sweating.

Health Benefits of Sauna Use

Regardless of its role in detoxification, sauna use has several proven health benefits. Regular sauna bathing has been linked to improved cardiovascular health, reduced risk of hypertension, enhanced mental health, and even longevity. These benefits are thought to arise from the stress that heat places on the body, akin to the stress induced by moderate exercise, and the resulting adaptive responses.


As with any health practice, it’s advisable to use the sauna in moderation and in conjunction with other healthy habits for the best overall results.

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