The fear of aluminum in deodorants: In recent years, pharmacy shelves have become a quiet arena of warnings. “Aluminum-free” labels stand out on packages, posts on social media warn about blocking toxins and the accumulation of dangerous substances in the body, and many choose to replace their deodorant out of health concerns. The central claim repeats itself in different formulations – aluminum is absorbed through the skin, accumulates in tissues, and may increase the risk of breast cancer or Alzheimer’s. However, when examining official medical reports, a very different picture emerges.

To understand the debate, it is necessary to distinguish between a regular deodorant and an antiperspirant. Deodorants are intended to reduce odor through antibacterial substances or fragrances, while antiperspirants contain aluminum compounds whose role is to reduce sweating. These substances create a temporary and partial blockage of the sweat glands, thereby reducing the amount of sweat released to the underarm area.

In medical reports by health bodies, including regulatory authorities in the United States and Europe, it is emphasized that the absorption of aluminum through the skin is extremely low. The accepted estimates speak of a minimal absorption rate, a few fractions of a percent, significantly lower than the amount of aluminum the average person consumes every day from food and water. Aluminum is naturally present in many foods, in vegetables, in grains, and even in drinking water, and the body eliminates most of it through the kidneys.

One of the central claims against aluminum in deodorants concerns breast cancer. The idea that blocking the sweat glands prevents the release of toxins and causes a dangerous accumulation in breast tissue is especially widespread online. In practice, reports by the National Cancer Institute and other health authorities consistently state that there is no scientific evidence linking the use of deodorants or antiperspirants to breast cancer. Epidemiological studies that examined deodorant use habits found no difference in disease rates between users and non-users.

Applying deodorant
Applying deodorant (credit: INGIMAGE)

The connection to Alzheimer’s has also appeared in headlines in the past, mainly due to the finding of aluminum levels in the brains of patients. However, updated medical reports emphasize that this connection is not causal. The aluminum found in brain tissues is not necessarily the cause of the disease, and there is no evidence that daily exposure to aluminum from deodorants increases the risk of a degenerative disease. Most researchers in the field see this claim as a hypothesis that has not been proven.

Another important point concerns the “toxin release” myth. Sweat is not a central toxin removal mechanism in the body. This role is mainly reserved for the liver and the kidneys. Sweat is composed mostly of water and salts, and partially blocking it in the underarm area does not disrupt systemic detoxification processes. Clinical reports have also not found a link between the use of antiperspirants and the accumulation of toxins in the body.

However, this does not mean that every use of aluminum is suitable for every person. People with sensitive skin, a tendency for irritation, or allergic reactions may prefer products without aluminum for reasons of comfort rather than general health reasons. The choice of a natural or aluminum-free deodorant is legitimate, but it is important to understand that it is based on personal preference and not on medical necessity.

The medical literature and reports by health bodies lead to a consistent conclusion: There is no solid scientific evidence that aluminum in deodorants increases the risk of breast cancer, Alzheimer’s, or other systemic harm. Public concern is understandable, but it is not supported by data.

There is no solid scientific evidence that aluminum in deodorants increases the risk of breast cancer, Alzheimer’s, or other systemic harm
There is no solid scientific evidence that aluminum in deodorants increases the risk of breast cancer, Alzheimer’s, or other systemic harm (credit: SHUTTERSTOCK)

The bottom line: Those who feel comfortable using an antiperspirant containing aluminum can do so without proven health concern. Those who prefer to avoid it can choose another alternative, but the concern is not based on science. As in many cases in the field of health, the difference between a gut feeling and medical evidence is important.

Dr. Itay Gal is a specialist in pediatrics, a sports and aviation physician, and a researcher of infectious diseases. The health reporter and medical commentator of Maariv and a lecturer in the fields of medicine and innovation. For more articles click here