Deodorant or antiperspirant for smelly armpits?

A deodorant works on odour, by masking it or limiting the bacteria involved. An antiperspirant reduces sweat, usually with an aluminium-based active ingredient, and in the US it is regulated as an over-the-counter drug. Many people use whichever matches the problem they actually have.

If a natural deodorant is not enough

Aluminium-free formulas often take a couple of weeks to adjust to, and results vary. Trying a smaller size or a different format, such as a cream or a serum, is reasonable before giving up.

When to ask a clinician

Persistent strong odour or sweating that is new or heavy can have a medical cause. Ask a pharmacist or clinician.