One common myth or rumor is that antiperspirants and deodorants can cause breast cancer, but there is no evidence of a link between the two.
Both the American Cancer Society and National Breast Cancer Foundation, Inc. provide excellent information on why this is a common myth.
Please visit the links below to research the topic more.
https://www.cancer.org/cancer/cancer-causes/antiperspirants-and-breast-cancer-risk.html