The usual recommendation has been to take zinc in combination with a zinc ionophore such as quercetin. One small controlled trial found a significant positive effect, however it also included several other supplements so it's unclear what effect zinc alone would have.<p><a href="https://doi.org/10.1177%2F2515690X211026193" rel="nofollow">https://doi.org/10.1177%2F2515690X211026193</a>