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August 7, 2025 37 mins

Melissa and Jam explore the science behind why sweat is salty. They discuss personal experiences with sweating, the types of sweat glands, and the chemical processes involved in sweat production. The episode explains how osmosis, ion channels, and salt concentrations contribute to the movement of sweat through sweat glands to the skin's surface. They also touch on evolutionary aspects and the role of sweat in cooling the body. For anyone curious about the chemistry of everyday life, this episode offers an accessible and intriguing explanation.

00:00 Introduction: Why is Sweat Salty?
00:27 Personal Experiences with Sweat
01:32 The Science Behind Sweat
02:00 Meet the Hosts
02:20 Types of Sweat Glands
04:30 How Sweat Reaches the Skin
07:31 The Role of Salt in Sweat
14:20 Health Indicators in Sweat
17:01 Understanding Osmosis and Interstitial Fluid
17:39 Evolutionary Perspective on Sweating
20:01 Mechanism of Sweat Glands
22:41 Sweat Composition and Function
27:39 Personal Sweating Experiences
33:47 Supporting the Show and Community

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References from this episode:

  1. https://pmc.ncbi.nlm.nih.gov/articles/PMC6773238/
  2. https://pubs.rsc.org/en/content/articlehtml/2024/lc/d3lc00874f#cit23
  3. https://pubs.acs.org/doi/full/10.1021/acsnano.4c10344

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