Deodorant vs Antiperspirant: Why the Labels Are Different

The short answer

In the US, a deodorant is a cosmetic: it manages odor. An antiperspirant is an over-the-counter drug: it reduces the flow of sweat, which is an effect on a function of the body. That effect is what moves a product from the cosmetic side of the line to the drug side, however similar the two look in a store.

The rules in this page are US rules, and the volume they come from is written for readers shopping on a US shelf.

How to tell which one you are holding

1. Look for a "Drug Facts" panel. An antiperspirant has one. A deodorant does not.
2. In that panel the active ingredient is named with a stated percentage. The ingredients are split in two: the active first, with its percentage, then the inactive ingredients.
3. Check for the mandatory warning. Antiperspirants that use an aluminum salt carry a required warning (21 CFR 350.50), which is a regulatory disclosure and not a claim about any product.
4. A deodorant instead has one ordinary ingredient list in descending order of weight, with no percentages.

What sits behind each label

On the antiperspirant side the active is an aluminum salt recognized in the FDA antiperspirant monograph (21 CFR Part 350). Its permitted indication is narrow: it reduces perspiration. A product that claimed to treat a medical condition would need a different regulatory pathway.

On the deodorant side the material that does the work is chemically different. A pH-modifying ingredient such as sodium bicarbonate is mildly alkaline, and that property, not any sweat-blocking action, is why it appears in some deodorants. Because odor control is what makes it a cosmetic, none of the drug-label requirements apply.

When you compare prices

Settle the category first, then compare. A deodorant against an antiperspirant is not a like-for-like comparison, because they are different kinds of product. Within antiperspirants the percentage of the active is printed on the panel, so it is read, not guessed. Within deodorants there is no stated percentage, and the list can only tell you where an ingredient sits in the order.

What the label cannot tell you

The label tells you the category and, for an antiperspirant, the active and its percentage. It does not tell you whether a given percentage is enough for you, or how one product's odor control compares with another's. This guide does not rank outcomes either. It teaches you to read what the label does say.

Materials behind these labels

• Aluminum Chlorohydrate — An antiperspirant active, which puts the product on the drug side of the line.
• Sodium Bicarbonate — A pH modifier used in some deodorants, which keeps the product on the cosmetic side.

What the full volume adds

This page answers one question from Volume Three — Body Care. The volume goes further:

• A full profile of each material above, with its history and its other uses
• What price actually buys in body care, including the drug and cosmetic split
• Three worked examples, including a matched deodorant and antiperspirant pair
• The one-page checklist to print and take shopping

See Volume Three — Body Care →