I am using the ones from Vitacost. It is quite potent, especially when one pill give you around 30 mg. That is like 200 percent of daily recommended intake.



However, I found that zinc is flying through the shell during this pandemic. There are some brands that were sold out the last time I checked.



Vitacost is quite affordable. If you want to buy zinc locally, you have to pay a lot more put the same kind of items