Myth: "Antiperspirants cause breast cancer"

The myth

There are widespread fears that aluminium antiperspirants cause breast cancer.

The facts: how it really works

Aluminium salts form temporary plugs in sweat ducts. Very little is absorbed through intact skin. Reviews by cancer organisations have found no convincing evidence of a link.

Why it matters on darker skin

Antiperspirants are useful for hyperhidrosis and odour across all skin types.

Where the myth comes from

Breast cancers often occur in the upper outer area near the armpit, which prompted the theory; the area simply has more breast tissue.

What actually helps — and why

Use antiperspirant on dry skin at night: most effective. Expected timeline: days.

More detail

The theory that antiperspirants cause breast cancer spread through emails and social media in the early 2000s. It suggested that blocking sweat traps 'toxins', or that aluminium or parabens are absorbed and act like oestrogen. Sweating is not a major route for removing toxins — that is the job of the liver and kidneys. Studies comparing women with and without breast cancer have not found that antiperspirant use increases risk, and reviews by the US National Cancer Institute and the American Cancer Society conclude there is no convincing evidence of a link. Research continues, as it should, but the established risk factors for breast cancer — age, family history, alcohol, obesity and hormonal factors — are where prevention efforts make a difference. Knowing what is normal for your breasts and attending screening when invited matter far more than which deodorant you choose.

What to avoid and why

Avoid applying to broken or freshly shaved skin.

Common mistakes

• Stopping effective treatment due to fear.

Body care basics in a hot climate

Heat and humidity mean the body sweats more, which feeds the bacteria and yeasts that cause odour, rashes and some types of body acne. A daily lukewarm shower with a gentle, soap-free or mild cleanser, thorough drying of skin folds and between toes, and fresh, breathable cotton clothing prevent many problems. Moisturise straight after bathing while skin is still damp so water is sealed in; this matters even in humid months because frequent washing strips natural oils, and it matters most during harmattan. Avoid sharing towels, razors and sponges, which spread fungal and bacterial infections. When shaving, use a sharp blade, shave with the grain and do not stretch the skin; for curly hair a guarded trimmer is often better. Be cautious with body-lightening, 'carrot' or 'toning' lotions: many contain undeclared steroids or mercury. If a rash spreads, keeps coming back, or appears with fever, see a doctor rather than trying more creams.

Choosing body products

For most people an unscented, gentle cleanser and a plain moisturiser are enough. Antiperspirants containing aluminium salts are the most effective way to reduce sweating and are best applied at night to dry skin. Fragranced body sprays and deodorants are a common cause of allergy; fragrance-free options are kinder to sensitive skin. Aerosol products are easy to over-apply and some have been recalled for benzene contamination, so roll-ons and creams are a sensible default. For fungal rashes, plain antifungal creams such as clotrimazole are better than combination creams containing strong steroids, which can make infections spread. Always check for a NAFDAC number and a full ingredient list.

Questions to ask your doctor or pharmacist

Useful questions include: What do you think is causing this? Is it likely to come back, and how can I prevent it? Which products should I stop? How long before I should expect improvement, and when should I come back if it isn't better? Are there side effects to watch for? Is this treatment safe if I am pregnant, breastfeeding or for my child? Writing your questions down, bringing your products (or photos of their labels) and taking dated photos of the problem make an appointment much more useful.