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>Vitamin D naturally occurs when people go outside and get exposed to the sun, and going outside is correlated with all sorts of healthy traits.

And also increases the risk of skin cancer and Parkinson's!

You what? Sun gives you Parkinson's now?

If you have limited melanin where does it go, your sun tan or substantia nigra?

I make melanin in my melanocytes.

> I make melanin in my melanocytes.

It's a finite rate, which means there's a useful limit of production.

I don't think the ones in my meninges are making it for my skin.