Testosterone Levels by Age

Testosterone is a hormone that is present in both men and women; although, testosterone levels in men are much higher. In men, levels typically start to decline after age 30 while levels start to decline by age 45 in women. The hormone plays a pivotal role in the human body and in various aspects of adult health.

The Role of Testosterone in the Body

How Testosterone Impacts Physical Health

  • Testosterone contributes to muscle mass and strength, making it a crucial factor in physical performance and overall muscular development.

  • Adequate levels support the production of red blood cells, which carry oxygen to muscles and other tissues, thereby enhancing stamina and energy levels.

  • It helps to maintain strong bones and reduce the risk of osteoporosis, particularly in aging males.

  • Furthermore, testosterone is integral to fat distribution in the body, aiding in maintaining a healthy weight and preventing obesity-related health issues.

How Testosterone Impacts Mood and Cognition

  • Proper levels of testosterone can contribute to a balanced mood and sharp mental acuity, making it an essential element for overall well-being.

Symptoms of Low Testosterone

  • Low libido

  • Impotence

  • Erectile dysfunction

  • Infertility

  • Development of breasts

  • Difficulty concentrating

  • Depression

  • Fatigue

  • Increased body fat

Symptoms of High Testosterone

  • Aggression

  • Acne

  • Mood swings

What factors affect testosterone levels?

Several factors can influence these hormonal fluctuations:

  • poor diet

  • lack of exercise

  • insufficient sleep

  • drinking alcohol

  • smoking

  • long term stress

  • obesity

The Importance of Age in Determining Normal Testosterone Levels

In younger men, higher levels are typical, supporting energy, strength, and overall vitality.

However, as men transition into their 30s and 40s, these levels begin a gradual decline, decreasing by about 1% each year.

This decrease doesn't just affect physical health but can also impact mental well-being and quality of life.

By recognizing these changes, men can take proactive steps to manage their hormone health, addressing issues early and adopting lifestyle changes or treatments to maintain balance.

Testosterone production by age

Normal Testosterone Levels by Age Group

There are a lot of different opinions about what's considered normal and low testosterone levels.

The American Urological Association says that adult men with testosterone levels below 300 ng/dL are considered low.

However, according to endocrinologist, Kevin Pantalone, DO, he says levels below 250 ng/dL are considered low.

A study by the University of Michigan in 2018 which tested 1,486 men between the ages of 20-44 observed the following:

  • In males between 20-24 years of age, the cutoff for low levels was at 409 ng/dL

  • In males between 25-29 years of age, the cutoff for low levels was at 413 ng/dL

  • In males between 30-34 years of age, the cutoff for low levels was at 359 ng/dL

  • In males between 35-39 years of age, the cutoff for low levels was at 352 ng/dL

  • In males between 40-44 years of age, the cutoff for low levels was at 350 ng/dL

By the time men reach their 50s and beyond, the decline becomes more pronounced, with levels ranging from 200 to 800 ng/dL. This age-related drop can lead to more noticeable symptoms of low testosterone, impacting quality of life.

The Significance of Regular Testing and Monitoring

Tracking your testosterone levels through regular testing is more than just a health precaution—it's a vital step in maintaining overall well-being as you age. Regular monitoring can catch early signs of imbalances, whether they’re drops that may sap your vitality or spikes that could indicate underlying health issues.

Diagnosing low testosterone

A healthcare provider will first conduct a thorough medical history and physical examination to identify potential signs of low testosterone. Blood tests are then performed to measure the levels of testosterone, with multiple samples often needed to confirm consistent low readings due to the hormone's natural fluctuations throughout the day. Additional tests may be carried out to rule out other medical conditions influencing hormone levels, ensuring a comprehensive assessment is conducted before diagnosing low testosterone.

Supplements that support production of testosterone

We proudly partner with Thorne to bring you Zinc Picolinate, a vital micronutrient integral to over 200 enzymatic reactions, especially in testosterone metabolism. This potent supplement not only aids in promoting lean muscle mass but also supports numerous other bodily functions. With Zinc Picolinate, you're harnessing a natural remedy to boost your testosterone levels and enhance your overall health. Don't miss out on this opportunity to optimize your well-being—explore Thorne's vitamins and supplements today.

Treating Low Testosterone at MIMIT Health

Testosterone replacement therapy, also known as TRT, can help get your levels within a normal range. For men experiencing symptoms of low testosterone—such as fatigue, decreased libido, and mood changes—our testosterone replacement therapy offers a reliable solution. Our expert team is dedicated to restoring your testosterone levels to the normal range, which can significantly alleviate the signs and symptoms of hypogonadism. With personalized care and advanced treatments, MIMIT Health empowers you to reclaim your vitality and improve your overall quality of life. Experience the difference with our specialized testosterone therapy and take the first step towards a healthier you.


  1. Zhu A, Andino J, Daignault-Newton S, Chopra Z, Sarma A, Dupree JM. What Is a Normal Testosterone Level for Young Men? Rethinking the 300 ng/dL Cutoff for Testosterone Deficiency in Men 20-44 Years Old. J Urol. 2022 Dec;208(6):1295-1302. doi: 10.1097/JU.0000000000002928. Epub 2022 Oct 25. PMID: 36282060

  2. “Why Are Testosterone Levels Declining?” Cleveland Clinic Health Essentials, 20 September 2022, https://health.clevelandclinic.org/declining-testosterone-levels. Accessed 18 July 2024.

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