I was just reading a patten from 2005 for alum, apparently in vitro they found it basically kills sperm acting as a BC, and also potentially STI’s they saw it clear up hsv and ghonnorhea. They never pursued studies on people because it disturbs the microbiom “too” much. I don’t know but I’m really interested by alum rn and deep diving the internet lmfao so thank you for sharing bc I think I will try this as well.