I noticed in the studies themselves, they are using zinc sulfate, not picolinate. It’s been hard to find and I only found a combo of calcium 1000mg, magnesium 400mg, zinc sulfate 15mg. The directions are to take 3x/day with food.
There are also other precursors to make the zinc effective which are NMN (kinda expensive) and “sirtuins”, found in various foods. It’s difficult to navigate through the scientific jargon to figure out what the doses should be, so I don’t think it’s as simple as taking zinc alone. But, I keep trying!