Deodorant is a daily essential for most people, but mainstream deodorants often contain harmful chemicals. These chemicals are applied directly to your skin and under your arms near your lymphatic system and mammary glands. Many deodorants come in aerosol form, which may also be inhaled, posing additional risks to your health and the environment. Over a lifetime of daily use, the cumulative exposure to these harmful chemicals is significant and can be avoided when people switch to natural deodorants.