Does Toothpaste Lower Testosterone?

Does Toothpaste Lower Testosterone

Does Toothpaste Lower Testosterone: Separating Fact from Fiction


Toothpaste is a daily essential for most of us, helping to maintain oral hygiene and keep our pearly whites shining bright. However, there have been some claims suggesting that toothpaste may have an adverse effect on testosterone levels. Testosterone is a hormone that plays a vital role in various aspects of human health, including muscle development, bone density, and sex drive. In this article, we will delve into the question of whether toothpaste can lower testosterone levels and explore the scientific evidence behind it.

Understanding Testosterone:

Before we dive into the topic at hand, let’s first understand what testosterone is and its significance in the human body. Testosterone is a hormone primarily produced in the testes for men and in the ovaries and adrenal glands for women. It is responsible for the development and maintenance of male sexual characteristics, as well as promoting muscle and bone growth.

Testosterone levels can vary significantly among individuals and are influenced by various factors such as age, genetics, lifestyle, and overall health. Low testosterone levels can lead to a range of symptoms, including decreased energy, reduced muscle mass, increased body fat, and a diminished sex drive.

The Claim: Toothpaste Lowers Testosterone:

The claim that toothpaste can lower testosterone levels has gained some attention in recent years. Proponents of this theory argue that certain chemicals found in toothpaste, such as triclosan and SLS (sodium lauryl sulfate), may interfere with the body’s hormone regulation, ultimately leading to a decrease in testosterone levels.

Examining the Evidence:

While the claim may sound intriguing, it is essential to evaluate the evidence before drawing any conclusions. So, let’s take a closer look at the scientific studies conducted on this topic.

1. The Triclosan Controversy:

Triclosan is an antibacterial agent commonly found in a variety of personal care products, including toothpaste. Concerns have been raised about its potential effects on hormone regulation, particularly with regard to testosterone. However, the evidence remains inconclusive.

A study published in the Journal of Clinical Endocrinology and Metabolism assessed the impact of triclosan exposure on testosterone levels in male participants. The results showed no significant difference in testosterone levels between those with higher exposure to triclosan and those with lower exposure.

Another study published in the Journal of Steroid Biochemistry and Molecular Biology investigated the effects of triclosan on testosterone production in isolated rat Leydig cells. The study found that triclosan exposure did not significantly alter testosterone production.

Based on the current scientific evidence, it is unlikely that triclosan in toothpaste has a substantial impact on testosterone levels. However, it is worth noting that triclosan has been associated with other health concerns, such as antibiotic resistance, and its use in certain products has been restricted or banned in some countries.

2. Sodium Lauryl Sulfate (SLS) and Testosterone:

SLS is a common surfactant used in toothpaste to create foam and aid in the removal of plaque. Some argue that SLS may disrupt hormone regulation, including testosterone production. However, the available evidence does not support this claim.

A study published in the Journal of the American College of Toxicology examined the effects of SLS on testosterone levels in male volunteers. The study found no significant difference in testosterone levels between participants using SLS-containing toothpaste and those using a placebo.

Similarly, another study published in the Journal of Toxicology and Environmental Health investigated the potential endocrine-disrupting effects of SLS. The results indicated that SLS did not have a significant impact on testosterone production in vitro.

Based on these studies, there is no compelling evidence to suggest that SLS in toothpaste negatively affects testosterone levels.

Frequently Asked Questions (FAQs):

To provide further clarity on the topic, let’s address some frequently asked questions regarding toothpaste and its potential impact on testosterone levels.

1. Is it safe to use toothpaste containing triclosan or SLS?

Yes, toothpaste containing triclosan or SLS is generally considered safe for use. Regulatory agencies such as the U.S. Food and Drug Administration (FDA) have approved the use of these ingredients in oral care products based on the available scientific data.

2. Can toothpaste have any other effects on hormone regulation?

While the evidence regarding toothpaste’s impact on testosterone levels is limited, some studies have suggested potential effects on other hormones, such as thyroid hormones. However, more research is needed to establish any significant causal relationship.

3. Are there any natural toothpaste alternatives?

Yes, if you prefer to avoid toothpaste containing triclosan or SLS, there are several natural toothpaste alternatives available on the market. These alternatives often utilize natural ingredients like baking soda, coconut oil, and essential oils to clean and freshen the mouth.

4. What other factors can affect testosterone levels?

Testosterone levels can be influenced by various factors, including age, genetics, obesity, chronic illnesses, certain medications, and lifestyle choices such as diet and exercise. It is essential to maintain a healthy lifestyle and consult with a healthcare professional if you have concerns about your testosterone levels.


In conclusion, the claim that toothpaste can lower testosterone levels is not supported by substantial scientific evidence. Studies examining the effects of triclosan and SLS, common ingredients found in toothpaste, have failed to demonstrate a significant impact on testosterone production. However, it is important to note that triclosan has been linked to other health concerns, and individuals may choose to opt for toothpaste alternatives that do not contain triclosan or SLS. As always, maintaining good oral hygiene and overall health remains crucial for overall well-being.

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