There are three forms of compounded zinc supplements that are widely available in Australia: zinc gluconate, zinc sulfate and zinc acetate. Dr. Singh says that all three should be considered ‘fairly equal’ in terms of effectiveness.
Still, she does have some advice when it comes to which bottle to reach for.
“Look on the label for ‘elemental zinc’; that’s the measure of it outside of the compound,” she says. Meaning, that’s the actual quantity that’s available for use by your body once the product breaks down. She also recommends avoiding nasal sprays; there’s research that links intranasal zinc with a potential risk for loss of smell.