Guys who have SD have their feet very dry and constantly flaky. They also have a horrible smell in the feet and eczema between the toes.
I just add baking soda (sodium bicarbonate) pure powder between the toes and around the entire foot, throw a bit of powder inside the socks and shoes once a week and let it stay there.
My feet have improved 100% I have no foul smell in the shoes or socks or feet.