Do Aluminum-Free Deodorants Protect You from Cancer? For decades, the controversy has raged over aluminum in deodorants. Do they cause cancer or not? Scientists know that aluminum is “linked” to cancer, but it has yet to be positively proven to cause cancer in breast tissue. Studies as far back as 2002 haven’t made a definitive connection. However, studies continue to show that women with breast cancer have higher levels of aluminum than those who don’t have breast cancer. So