In the 1910s deodorants and antiperspirants were relatively new inventions. The first deodorant, which kills odor-producing bacteria, was called Mum and had been trademarked in 1888.
While the first antiperspirant, which thwarts both sweat-production and bacterial growth, was called Everdry and launched in 1903.
he rumor that antiperspirant use causes breast cancer continues to circulate the Internet. Although unfounded, there have been no published epidemiologic studies to support or refute this claim.
Watch: What Is Deodorant Really Doing To Your Body?
The effect of habitual and experimental antiperspirant and deodorant product use on the armpit microbiome.
This population-based case- control study investigated a possible relationship between use of products applied for underarm perspiration and the risk for breast cancer in women aged 20-74 years.
The human armpit has long been noted to host a high biomass bacterial community, and recent studies have highlighted substantial inter-individual variation in armpit bacteria, even relative to variation among individuals for other body habitats.