You'll only need a few simple ingredients for your All-Natural Deodorant:

1/4 Cup of Baking Soda (neutralizes odor)
1/4 Cup of Arrowroot starch (absorbs moisture)
4 Tb Coconut Oil (anti-bacterial and moisturizing)
1/4 tsp Tea Tree Oil (anti-bacterial)

Mix all ingredients together to form a paste/cream... and that's it!

Did you know that your favorite deodorant might contain dangerous ingredients that are known to cause cancer, brain damage, and liver abnormalities? Here are three of the worst:

Parabens: Parabens (look on the label for methylparaben, ethylparaben, propylparaben, butylparaben or isobutylparaben) are used in many skincare and cosmetic products. They function as a preservative to discourage bacteria and fungus. Research indicates that parabens from lotions or deodorants absorb into the body and weakly mimic estrogen, wreaking havoc on the endocrine system. Parabens have, not surprisingly, been found in breast cancer tumors- did you know that over 55% of breast tumors are located on the upper outside of the breast, near the underarm? That fact alone is enough to reconsider your paraben-ridden deodorant!

Aluminum: The active ingredient in many deodorants/antiperspirants is aluminum, which actually blocks the body from producing sweat. I'd really hesitate to use any chemical compound that inhibits a normal and useful bodily function... but aside from that, aluminum can cause neurological damage and contribute to diseases like Alzheimer's and Parkinson's. Aluminum can enter and remain in a human bloodstream for up to two weeks after just one application of deodorant/antiperspirant.

Propelene Glycol: Propelene Glycol, often used in deodorants, is an ingredient in antifreeze. Factory workers who are exposed to it are warned of the danger of kidney, brain, and liver damage through skin contact.

http://hannahmaria.blogspot.com/2011/11/make-your-own-all-natural-deodorant.html