Could be linked to cancer? I just watched shark tank and someone selling this all natural deodorant on tonight's show stated that their are links of antiperspirant deodorants causing cancer and alzheimer's. Ive never heard of this before and its sort of freaky because i spent my teen years using a product called certain dri strong antiperspirant overnight roll on that was supposed to help for next days use i also used the daytime certaindri. Kind of freaked out.