Deodorant vs. antiperspirant: what's the actual difference?

Short answer: a deodorant is a cosmetic that works on odor. An antiperspirant is an over-the-counter drug that reduces how much you sweat, using aluminum salts. Two different jobs, two different regulatory categories, sold on the same shelf — which is why almost everyone uses the words interchangeably.

What a deodorant does

Sweat itself is close to odorless. The smell comes later, when skin bacteria break sweat down. A deodorant works on that second step: it makes the underarm a less hospitable place for odor-producing bacteria and absorbs some of the moisture they need. You still sweat normally. You just don't smell like it.

Because a deodorant only addresses odor, U.S. regulators treat it as a cosmetic. That is the category our tallow deodorant falls into.

What an antiperspirant does

Antiperspirants use aluminum compounds — aluminum chlorohydrate, aluminum zirconium tetrachlorohydrex gly, and relatives — that form temporary plugs in the sweat ducts and reduce the amount of sweat that reaches the skin surface. Because reducing perspiration is a change to a body function, the FDA regulates antiperspirants as OTC drugs under a dedicated monograph, with required "Drug Facts" labeling.

That's the honest, non-alarmist distinction. An antiperspirant is not a villain; it is simply a drug product doing a different job than a deodorant. If your goal is measurably less wetness, an antiperspirant is the product designed for that.

How to tell which one you're holding

• Read the panel. A Drug Facts box with an "Active ingredient" line means antiperspirant. An ordinary ingredient list means deodorant.
• Look for aluminum. Any aluminum salt listed as an active ingredient is an antiperspirant.
• Check the claim. "Reduces wetness" is antiperspirant language. "Controls odor" is deodorant language.

Which should you use?

It depends on what actually bothers you. If it's smell, a deodorant is the right tool and you don't need a drug product to solve it. If it's visible wetness during presentations or in dress shirts, that's what antiperspirants are formulated for. Plenty of people use an antiperspirant for a handful of situations each year and a deodorant the rest of the time.

We make a deodorant, and we say so plainly: our formula does not block sweat, and we would not claim it does. What it does is control odor with four ingredients — grass-fed and finished tallow, organic cold-pressed coconut oil, organic arrowroot powder, and magnesium hydroxide.

Keep reading

Start with the complete guide to tallow deodorant, see the four formats side by side on our natural deodorant comparison, or read whether natural deodorant can stop sweat. Ready to try it? Shop our tallow deodorant.