This week, Emily and Perry tackle creatine, a beloved amino acid derivative with surprisingly robust health properties. What is it actually doing to our muscles, and our brain? Pop a gummy, or stir in some powder, and find out.

Plus: Casey Means might be out for Surgeon General, stem cells don't help heart attacks, and just how much sugar intake affects your kids.

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This week, Emily and Perry go toe-to-toe with the scammier side of the wellness industry: regenerative medicine clinics that claim to inject you with stem cells. Are they the fountain of youth? (No.) Are they even injecting you with stem cells? (Not really.) Are they preying on sick people? (Most definitely yes.) From knee cartilage to sickle cell disease, we've got the miraculous, the bad, and the truly ugly of stem cell therapy.

Plus: the generational woes of lead poisoning, debunking stress as a cause of cancer, and doulas for all!

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This week, Emily and Perry dive into the here, there, and everywhere of microplastics. We know they're in the air we breathe and the water we drink, but how bad are they for us, really? How do our bodies respond to them, and how long do they even stay inside us? And can they be avoided?

Plus: Leucovorin approved to treat autism, whether ChatGPT is a trustworthy triage nurse, and curious reports of painful sex in college students.

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