Sweat the Small Stuff

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Of all our daily grooming habits, swiping a deodorant stick or squirting antiperspirant under our arms may be the one we dare not neglect. Hot yoga classes and subway etiquette practically demand it. But when it comes to choosing a BO buster, we should care just as much about how it affects us as it does others—and that means avoiding the harmful ingredients many deodorants contain.

Why? Unlike soaps or shampoos, “these cosmetics are not rinsed off,” says Philippa Darbre, breast cancer researcher at the University of Reading in England. “The entire application is left on the skin each time, allowing for the accumulation of chemicals in the underarm and upper breast area.”

The sensitive skin in these areas eventually absorbs this chemical overload—some of which is toxic—into the underlying tissue, where it can wreak havoc in the body. Beware of these primary offenders:

Aluminum compounds.
Found only in antiperspirants, aluminum zirconium and aluminum chlorohydrate work by blocking pores that release sweat. Aluminum, like other heavy metals, may interfere with the ability of estrogen receptors to correctly process the hormone.

Propylene glycol.
Because this ingredient functions as a penetration enhancer, it can be more harmful when paired with other chemical additives. The ingredient—even in concentrations as low as 2 percent—provokes skin irritation in some people, yet manufacturers can create a product with 50 percent propylene glycol content. Believe it or not, you’re likely to find this in many “natural” deodorants.

Triclosan.
Used as an antibacterial agent and preservative, triclosan reacts with tap water to create chloroform gas, a potential carcinogen. Triclosan also exhibits endocrine-disrupting properties in marine animals—which should concern everyone because it also has shown up in human breast milk and blood.

Steareths.
Usually listed with a number (like steareth-15), these additives come from a cheap process that makes harsh ingredients more mild. The process (known as ethoxylation) produces carcinogenic 1,4-dioxanes during manufacturing.

Safe alternatives
You can say no to toxin-laced deodorants and still stay sweet smelling by choosing products that rely on more natural (and side effect-free) ingredients such as:

Mineral salts.
Ammonium or potassium alum, the ingredients in solid crystal deodorants, work by constricting the protein in sweat so that malodorous bacteria have less to feed on.

Clay and powders.
Clay minerals such as kaolin and bentonite and natural powders like cornstarch or arrowroot help absorb moisture.

Astringents.
Witch hazel, sage, alcohol, and other astringents work by evaporating the moisture on the skin and constricting the pores. They are usually used in conjunction with essential oils that have antibacterial properties.

Making the switch
When you swap any conventional cosmetic for a more natural one, you need to give your body time to readjust. With deodorants, a few sim...

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