In the past, I only used deodorants that were aluminum-free, because I heard, like many of you probably have, that the aluminum and other chemicals can seep into your skin and cause breast cancer - that clogging your pores prevents toxins from escaping, so they stay in your body.
This is not true.
The FDA has squashed this myth, quoting the National Cancer Institute (NCI), saying that "no existing scientific or medical evidence links the use of underarm antiperspirants or deodorants to the subsequent development of breast cancer."
The American Cancer Society (ACS) agrees. They say that sweat glands are not connected to the lymph nodes. Most cancer-causing substances are removed by your kidneys, and released through urine by the liver, and also when you poop. The lymph nodes don't release toxins through sweating.
Well there you have it. Antiperspirants do not cause breast cancer. Go ahead and buy any deodorant or antiperspirant your little heart desires.