Also, I wanted to point out that, although Dr. Z stipulates a limited-duration regimen, many people will see 50 mg zinc and take that amount until it runs out.
Just to clarify, Dr. Z said 220 mg zinc sulfate, one daily 5 to 7 days for treatment, a lot less for health maintenance. The 50 mg. ELEMENTAL ZINC was because there are a number of different forms of zinc, and I have not found zinc sulfate, so you have to calculate how much actual zinc is in each tablet. I have zinc oxide 50 mg, but it has a much smaller amount of elemental zinc, so I calculated I needed to take 5 of those tablets to get 50 mg. of elemental zinc, which I would only do if I thought I was sick with Covid. Currently I take one every other day along with what I mentioned taking before.