Does Aluminum-Free Deodorant Work? Yes for Odor, No for Sweat

The FDA lists deodorants among cosmetics. The federal rule for over-the-counter antiperspirants defines an antiperspirant as a drug product applied to the skin that reduces the production of sweat where it is applied, and the FDA says deodorants that are also antiperspirants must meet the requirements for both cosmetics and drugs.

That is why antiperspirant labels carry drug-style warnings. The rule requires lines such as do not use on broken skin, stop use if rash or irritation occurs, and ask a doctor before use if you have kidney disease. The Degree listing in our men's deodorant guide shows these warnings.

The federal rule lists the active ingredients an over-the-counter antiperspirant may use, and all of them are aluminum compounds: aluminum chloride, the aluminum chlorohydrate group and the aluminum zirconium group, each with a concentration cap. The National Cancer Institute and Scripps Health both describe how they work: the aluminum compounds form a temporary plug in the sweat ducts.

So a product without one of those actives is not an over-the-counter antiperspirant. The Degree and Dove sticks in our guides list aluminum zirconium tetrachlorohydrex GLY as their active ingredient; the Old Spice Aluminum Free and Native sticks list no antiperspirant active.

Scripps Health says deodorants do not stop sweat; they reduce odor-causing bacteria, mask odor with fragrance, or both. It answers this page's question plainly: aluminum-free deodorants help control body odor but do not reduce sweating.

The listings agree. Native claims 72-hour odor control and Old Spice claims 24/7 odor protection, and neither makes a sweat claim. If less wetness is what you want, you need an antiperspirant, such as the Dove pick in our women's deodorant guide.

The Crystal roll-on in our women's guide lists potassium alum, which is not on the federal list of antiperspirant actives. Crystal sells it as a mineral deodorant, and its listing claims odor protection, not sweat reduction. Its listing words the aluminum question narrowly: it says it contains no aluminum chlorohydrate or aluminum zirconium, and its title says aluminum chloride free. We repeat those words rather than calling it aluminum-free ourselves.

You may see the word detox used about switching to aluminum-free deodorant. Scripps Health says there is no evidence that the body detoxes. It says some people notice more body odor or sweating after switching, and that this temporary adjustment usually lasts several days to a few weeks.

The National Cancer Institute says no scientific evidence links antiperspirant or deodorant use to the development of breast cancer. It notes that only a few studies have looked at the question, that their results conflict, and that more research would be needed; its page was last reviewed in August 2016. It also cites a 2014 review that found no clear evidence that aluminum-containing antiperspirants raise breast cancer risk.

Scripps Health says research has found no link between aluminum in antiperspirants and breast cancer or Alzheimer's disease, and that only very small amounts are absorbed through healthy skin. Questions about your own health, including the kidney-disease warning on antiperspirant labels, are for your doctor.