How to Avoid Aluminum in Your Antiperspirant

If you don't want to expose yourself to potentially toxic aluminum every morning, you will have to go without antiperspirant altogether, or use products that do not contain aluminum chlorhydrate.

Colloidal silver 

One "natural" product that will kill the bacteria that cause body odor is colloidal silver, but colloidal silver causes systemic problems outside the brain. Don't use colloidal silver under your arms.

Buy fabrics that wick water away from your skin

You are better off buying fabrics that wick water away from your skin. Keeping skin dry keeps odor-forming bacteria from forming. Gore-Tex is expensive but reliably keeps you dry. Polyester wicks water away from your skin, but the water is absorbed back through the fabric if humidity is high.

Make herbal formulas made with sage, lemon oil, and lavender

Or if you prefer to be able to cool off by sweating, you can fight bacteria with herbal formulas made with sage, lemon oil, and lavender. These herbal combinations not only kill the bacteria that make you stink, they also protect your underarms from chafing and irritation—assuming you are not allergic to any of the herbs in the formula. The first time you use an herbal deodorant, test just a tiny amount of the spray on your wrist or inner arm. Wait 24 hours to make sure there is no skin reaction before you use the product under your arms.

Try a dab of milk of magnesia

And if you just can't afford an herbal deodorant, try a dab of milk of magnesia. The magnesium in the milk of magnesia is actually nutritional, and the product is aluminum-free. (Other products for stomach upset usually contain aluminum. Aluminum-based products for gas and diarrhea that are still legal in the USA have been banned in the European Union.)