So what's so bad about regular deodorant?

Paraben interferes with your body’s natural hormone production by posing as imposter hormones, such as estrogen. Parabens are essentially preservatives that extend product shelf life. It’s easily absorbed into the skin, and has been linked to breast cancer in certain studies.

Phthalates are used as plasticizers in plenty of everyday products. They work to make other ingredients more malleable, and also help preserve the life of scented products. Toxic phthalates have been suspected to cause reproductive and fertility issues, breast cancer, ADHD, autism spectrum disorders, and more.

Intended to kill bacteria, triclosan is in fact a type of pesticide added to beauty products without unsuspecting consumers even knowing. Similar to parabens, triclosan interrupts hormone production. It’s even thought to potentially make bacteria resistant to certain antibiotics.

Like others on this list, diethanolamine is linked to certain cancers. Often abbreviated as DEA on most labels, diethanolamine contains known carcinogens such as 1,4-dioxane.