Magnesium.

Another day, another conversation with someone about how their “health issues” are really just a magnesium deficiency.

Aching lower back. Trouble sleeping. Constipation.

Here, take this magnesium citrate.

The next day: Wow! How did you know that would help so much?

Estimates are that 50% of the U.S. population is deficient in magnesium but I argue that it’s much higher.