Iodine
Critical for brain development and thyroid function, concentrations are halved in the breast milk of women who smoke.
Videos Mentioning Iodine

Capsaicin, Multivitamins, and Time Off (Episode 60)
Stronger By Science
Discussed in relation to the resurgence of deficiencies due to changes in water filtration and a shift from iodized table salt to fancy, non-iodized salts.

Hacking Out of a Network - Computerphile
Computerphile

Using Salt to Optimize Mental & Physical Performance | Huberman Lab
Andrew Huberman
A mineral discussed in a previous episode on metabolism, related to iodized salt and thyroid hormone function.

How to Control Your Metabolism by Thyroid & Growth Hormone
Andrew Huberman
An essential nutrient, primarily found in sea salt, kelp, and seaweed, required by the thyroid to produce T3 and T4 hormones. Sufficient intake is crucial for healthy metabolism and can reduce C-reactive protein and IL-6.

The Biology of Breast Milk
FoundMyFitness
Critical for brain development and thyroid function, concentrations are halved in the breast milk of women who smoke.