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Does Low Testosterone Affect Penis Size?

does low testosterone affect penis size
Aug 31 2023

Does Low Testosterone Affect Penis Size?

Low T and Penis Size

The size and shape of the penis varies widely from person to person. Men commonly wonder if they are “normal” and if it’s possible to increase penis size.


Maybe you’ve heard that low testosterone can affect your penis size? Read on to learn more about the relationship between size and testosterone levels and if you can change your penis size with testosterone therapy.

What’s a Normal Penis Size?

Your genetics, not your testosterone level, determines penis size. While some penises are larger and some are smaller, most of the size difference is during erection. During an erection, most will average around the same size. The size of the penis, when it’s flaccid (soft), doesn’t affect how big it gets with an erection.


During puberty, increasing testosterone levels cause changes in the penis and the male body. The testicles, scrotum, penis, and pubic hair grow. Puberty can start as early as age nine or as late as around fifteen. By the end of puberty, typically between ages 13-19, the penis has reached its expected size. The average adult penis is 2.5-5 inches long when flaccid and about 5-7 inches long during an erection.


Some medical conditions might affect penis size. Things like obesity, smoking, and poor cardiovascular health can impact penis size. A medical condition known as micropenis can result in a much smaller-than-average penis. Micropenis is one condition that may respond to testosterone therapy – but this is typically treated during childhood to stimulate growth during the normal development period.


Unfortunately, research has not supported changes in penis size when adults are treated with testosterone therapy.

What is Testosterone?

Testosterone is a sex hormone that is primarily responsible for the development of male sexual characteristics. It is produced by the testes in males but also in small amounts in the female ovaries and the adrenal cortex.


Testosterone regulates sex drive, bone mass, fat distribution, muscle mass and strength, and the production of red blood cells and sperm.

Changes From Low Testosterone

Part of the normal aging process is that testosterone levels eventually decline. Testosterone levels can begin to decline as early as age 25-30 and will continue to slowly decrease throughout a man’s life. Low testosterone levels can cause symptoms like:


  • Decreased sex drive
  • Erectile dysfunction
  • Decreased sperm count
  • Sleep problems
  • Reduced muscle size and strength
  • Bone loss
  • Increased body fat
  • Depression
  • Trouble with concentration


In addition, normal levels of testosterone protect against diabetes, heart problems, hypertension, cancer, and obesity.


From a size standpoint, the length of the penis doesn’t change once you reach adulthood, but low testosterone can change the quality of your erection. You may notice less sensitivity, problems getting or keeping an erection, and a less firm erection. It might also be more difficult to reach a climax. Because of these changes, you might feel like your erect penis is smaller. Testicle size may also decrease when testosterone levels drop. So even though testosterone therapy won’t increase the size of your penis, it can improve your sexual function.

How Do I Know If My Testosterone Levels Are Low?

You might suspect your testosterone levels are low based on symptoms like those listed above. The way to tell for sure is with a simple laboratory test. Testosterone levels can be checked with a blood draw.

What’s the Treatment For Low Testosterone?

While there are some ways to boost testosterone levels naturally, treatment often includes a testosterone supplement. Testosterone can be administered through supplements, injections, or pellet therapy. Our specialists at Vitality Aesthetic and Regenerative Medicine will evaluate your symptoms and concerns, analyze your labwork, and recommend an optimal treatment plan to achieve your best state of health.


The good news is that symptoms resolve quickly once testosterone levels are treated. And if your primary concern was sexual performance, you can expect to quickly return to a more youthful, vital state.


Some ways to increase testosterone levels naturally include:


  1. Exercising and lifting weight weights.
  2. Eat a healthy, well-balanced whole-food-based diet.
  3. Minimize stress and cortisol levels.
  4. Get some sunlight exposure and take a Vitamin D supplement.
  5. Take a multivitamin containing zinc.
  6. Get enough sleep.
  7. Take a natural testosterone booster supplement (ashwagandha).
  8. Avoid exposure to BPA, parabens, and other toxins.

Is There Anything I Can Do To Increase Penis Size?

Because penis size is related to your genetics, there really isn’t a way to increase your natural size. You may hear about products or procedures that claim to increase penis size, but these are not scientifically supported and may even be harmful. It’s best to accept and become comfortable with your body the way it is. If sexual function is a problem, there are ways to improve the quality of your erection and increase your sex drive.

How Do I Learn More?

If you are concerned about your sexual function, penis size or experience bothersome symptoms of hormonal imbalance, the best way to start treatment is by contacting us today. Our providers will review your symptoms and health history during a comprehensive consult.


We look forward to helping you improve your health and feel your best!