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Antiperspirant myths: pores, “not sweating is harmful”, and toxins

Antiperspirants are surrounded by scary stories: that they stop the body from cooling, trap toxins, and cause serious diseases. Let’s look at what medical organisations say.

OKEY
OKEY Editorial TeamUpdated 27 October 2026
A closed OKEY bottle on a stone surface beside a few torn paper notes and a magnifying glass, soft daylight
Staged illustration for this article. It is not medical evidence.

Short answer

An antiperspirant works only where it is applied and does not stop the body from cooling. Sweat is mainly for cooling, not for removing toxins. Major cancer organisations have found no evidence linking antiperspirants to breast cancer, and a link to Alzheimer’s disease has not been scientifically confirmed.

Myth 1: antiperspirant stops the body from cooling

An antiperspirant acts locally, in the upper part of the sweat ducts in the area where it was applied. Sweat continues to be released over the rest of the skin.

The underarms are a small part of the body’s surface, so controlling them does not take away the body’s way of cooling down. In hot weather and during exercise you still sweat — there is simply less moisture in that area.

Myth 2: sweat removes toxins, so sweating is good for you

The main job of sweat is to cool the body. Removing metabolic waste is mostly the work of the liver and kidneys, not the underarm sweat glands.

So reducing sweating in one area does not lead to “toxins building up”. If you feel more comfortable with dry underarms, it is a matter of comfort, not harm to your health.

Myth 3: antiperspirants cause breast cancer and Alzheimer’s disease

The US National Cancer Institute states that there is no scientific evidence linking antiperspirants and deodorants to the development of breast cancer. The American Cancer Society likewise does not consider the available data to confirm such a risk.

A link between the aluminium compounds in antiperspirants and Alzheimer’s disease has not been proven either: the International Hyperhidrosis Society notes that leading organisations do not consider aluminium a key risk factor for the disease.

Myth 4: the more often and the more product, the stronger the effect

An antiperspirant’s strength depends not on quantity but on how it is applied. Specialists at the International Hyperhidrosis Society advise applying antiperspirant in the evening to completely dry skin, not only in the morning.

OKEY is applied in a thin layer — 2–3 strokes of the roller — before bed and washed off in the morning. The instructions say plainly: do not use it every day without need, and do not apply it more often just to strengthen the result. Once or twice a week, or as needed, is usually enough.

Myth 5: antiperspirant works instantly

The formula needs time to act in the sweat ducts. That is why OKEY is left on overnight, when sweating is usually lower, and the residue is washed off in the morning — the effect that has formed remains.

Judge the result after several correct applications: evening, clean and completely dry skin, a thin layer, washing off in the morning. If the effect is weak, check these conditions first rather than using more product.

Sources and documents

  1. US National Cancer Institute: antiperspirants, deodorants and breast cancer
  2. American Cancer Society: antiperspirants and breast cancer risk
  3. International Hyperhidrosis Society: antiperspirants and Alzheimer’s disease
  4. International Hyperhidrosis Society: antiperspirant basics
  5. Full OKEY instructions

Correct application is
part of the result.

Review the full instructions or go to Kaspi to buy OKEY.

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