Two more reasons to switch to natural deodorant: An Italian study recently published in the Journal of Inorganic Biochemistry found that breast cancer patients demonstrated higher levels of aluminum; a 2012 study out of Switzerland concluded, “Our observations do not formally identify aluminium as a breast carcinogen, but challenge the safety ascribed to its widespread use in underarm cosmetics.” And although the National Cancer Institute is “not aware of any conclusive evidence linking the use of underarm antiperspirants or deodorants and the subsequent development of breast cancer, public opinion begs to differ: Search “natural deodorant” on Amazon and you get more than five thousand products. We’re gaining on you, aluminum.…