be sure to look at how muchelemental zinc has
some say 50 mg zinc but actually have about 10 mg
each different type zinc has different elemental...
https://ods.od.nih.gov/factsheets/Zinc-HealthProfessional/
example 220 mg zinc sulfate= 50 mg elemental zinc
you can also get an idea by coresponding minimum daily percentage
Do we need more than the recommended daily amount in order to get major benefits to the immune system? Like would the amount in a multi be good enough?