Unraveling the Myth:
Does Testosterone Increase Size?

Unraveling the Myth: Does Testosterone Increase Size?


Does testosterone increase size? Explore its impact on muscle growth and penile size in this article. Find TRT options with Immortal Male.

Table of Contents


In the pursuit of physical prowess and self-confidence, many people explore the role of testosterone in both muscle growth and penile size. But does testosterone increase size?

Testosterone holds the promise of enhancing muscular strength and contributing to male sexual characteristics.

Does testosterone increase size?

What to Expect from This Article

In this article, we will examine the science behind testosterone replacement therapy. We will shed light on the nuanced interactions between:

  • Hormone levels
  • Exercise
  • Nutrition
  • Genetics
  • Age 

Does testosterone increase size? Join us on this journey as we unlock the potential of testosterone’s impact on muscle growth and penile size.

Does Testosterone Increase Size of Muscle Mass and/or Penile Size?

Does testosterone increase size? There is scientific evidence to support the claim that testosterone can increase muscle mass. Testosterone is an anabolic hormone. It plays a crucial role in muscle development and growth1

Many studies have demonstrated a positive correlation between testosterone levels and muscle size.2

Penile Size

When it comes to penis size, the relationship with testosterone is not as simple. Testosterone is involved in the development of the male reproductive system during puberty. 
But, limited scientific evidence suggests that testosterone influences penis size in adults. The size of the penis is mainly determined by genetic and developmental factors.3

Factors Influencing Muscle Growth and Penis Size

There are various factors that can influence muscle growth and penis size, including:

  • Genetics
  • General health
  • Exercise
  • Lifestyle choices

Testosterone levels alone do not dictate the extent of muscle growth or penis size.

How Can Testosterone Increase Muscle Mass and Penile Size?

Testosterone influences muscle growth through several physiological mechanisms, including:

Protein Synthesis

Testosterone promotes protein synthesis.4 This is essential for building and repairing muscle tissue. It enhances the production of muscle proteins, leading to an increase in muscle mass.

Activation of Satellite Cells

Testosterone activates satellite cells. These specialized cells help with muscle regeneration and growth.5 Satellite cells play a crucial role in muscle enlargement. This is done by fusing with existing muscle fibers and contributing to their growth.

Increased Neurotransmitter Activity

Testosterone affects neurotransmitters, such as dopamine and serotonin. These neurotransmitters play a role in muscle contraction and coordination. This can potentially enhance muscle strength and power output.6

How Testosterone Increases Penile Size

During puberty, testosterone contributes to the development of the male reproductive system. This includes the growth of the penis. 

But, the size of the penis is mainly determined by genetic and developmental factors. Testosterone affects penile size indirectly through the following mechanisms:

Pubertal Growth

Testosterone causes the growth of the penis during puberty. It stimulates the proliferation of penile tissue. This includes the spongy erectile tissue, leading to increased size.

Libido and Sexual Function

Testosterone influences sexual desire and erectile function. This can impact the perceived size and rigidity of the penis during arousal.

So, does testosterone increase size? The effects of testosterone on muscle growth and penile size vary from person to person.

Research on the Relationship Between Testosterone and Penile Size

But does testosterone increase size of the penis? Studies examining the direct relationship between testosterone levels and penile size in adults are very limited.

The available research suggests that testosterone plays a role in penile growth during puberty. But, its influence on penile size in adulthood is less significant.

Penile Dimensions With and Without ED

A study in 1996 measured penile dimensions in men with and without erectile dysfunction. The study found a weak correlation between testosterone levels and penile length. 

However, the association was not strong enough to conclude a direct causal relationship.7

Impact of Testosterone on Sexual Function

A 2022 study discussed the impact of testosterone on sexual function. The review suggested that testosterone influences:8
  • Sexual desire
  • Erectile function
  • General sexual satisfaction

But, its direct effect on penile size in adults is minimal.

So, Does Testosterone Increase Size?

Testosterone plays a role in the development of the male reproductive system during puberty. But its impact on penile size in adults is less pronounced.

If you experience concerns about sexual health, the professional healthcare staff at Immortal Male can help.

The Influence of Testosterone on Muscle Size

Does testosterone increase size of muscle mass? The influence of testosterone on muscle size is significant. But, it’s only one of several factors that contribute to muscle growth and development. 

Exercise, nutrition, and genetics all play crucial roles in determining muscle size and strength. Here’s how each of these factors influence muscle size:


Engaging in resistance training is a primary stimulus for muscle growth. Exercise creates mechanical stress on the muscles. This causes adaptations that lead to increased muscle protein synthesis and enlargement. 

The important factors in stimulating muscle growth include:

  • Type
  • Intensity
  • Frequency
  • Volume


Adequate nutrition is essential for muscle growth. You can support muscle protein synthesis by consuming an appropriate amount of:

  • Calories
  • Macronutrients (proteins, carbohydrates, and fats)
  • Micronutrients (vitamins and minerals)

Protein intake is important for providing the building blocks necessary for muscle growth.


Genetic factors can influence a person’s muscle size and response to exercise. Certain genetic variations may affect factors such as:

  • Muscle fiber type composition
  • Hormone receptor sensitivity
  • Muscle-building potential 

Genetics can influence a person’s muscle size and ability to gain muscle mass.

Hormonal Factors

Testosterone promotes muscle growth and protein synthesis. Adequate testosterone levels are necessary for optimal muscle development. But, testosterone is not the sole determinant of muscle size. 

Other hormones also play important roles in muscle growth. These other hormones include growth hormone and insulin-like growth factor-1 (IGF-1).9

While testosterone is a key factor in muscle growth, it works in conjunction with several factors. Together, these factors determine a person’s muscle size and strength. Emphasizing a balanced approach is essential for increasing muscle size and development.

Possible Treatments to Increase Penile Size

There are medical interventions that claim to increase penile size. But, it’s important to approach these claims with caution. There is still limited scientific evidence supporting their effectiveness.

Testosterone Replacement Therapy (TRT)

Testosterone replacement therapy is a medical intervention to treat individuals with low testosterone levels.Testosterone replacement therapy is a medical intervention to treat individuals with low testosterone levels.10

TRT can have beneficial effects on various aspects of health. But, its impact on penile size in adults with normal testosterone levels is minimal.

Hormone Therapy

Some practitioners may offer hormone therapies that claim to increase penile size. However, the scientific evidence supporting the effectiveness of these interventions is often inconclusive.11

Surgical Procedures

Surgical procedures, such as penile augmentation or lengthening procedures, are available, but are often considered controversial. These procedures involve risks and potential complications. Their long-term outcomes and satisfaction rates vary.12

If you’re wondering does testosterone increase size, it’s important to consult with qualified healthcare professionals. At Immortal Male, we can provide accurate information and help guide you.

Risks or Side Effects of Increased Testosterone

Increased testosterone levels can have both positive and negative effects on the body. Here are some potential risks associated with increased testosterone levels:13

Hormonal Imbalances

Elevated testosterone levels can disrupt the delicate balance of hormones in the body. This can lead to potential imbalances. Imbalances can result in adverse effects on mood and hormonal health.

Suppression of Natural Testosterone Production

External testosterone can suppress the natural production of testosterone by the testes. This can lead to a dependence on external testosterone and potential testicular atrophy.

Acne and Oily Skin

Increased testosterone levels can stimulate sebum production. This can lead to acne breakouts and oily skin.

Fluid Retention and Bloating

Testosterone can cause bloating and increased water weight due to increased fluid retention.

Hair Loss

High levels of testosterone can speed up male pattern baldness in those predisposed to it.

Aggressive Behavior

In some cases, elevated testosterone levels may contribute to increased aggression or irritability. But, the relationship between testosterone and behavior is complex.

Cardiovascular Risks

Prolonged exposure to high testosterone levels may increase the risk of cardiovascular issues such as:

  • High blood pressure
  • Heart disease
  • Stroke

Risks May Vary

These specific risks and side effects can vary from person to person and depend on various factors, including:

  • Dosage
  • Duration of use
  • Individual health status
  • The method of testosterone administration

Before considering altering testosterone levels, get in touch with Immortal Male. We provide assessments by our certified doctors.

What is Hypogonadism and How Might Testosterone Affect Someone with This Condition?

Does testosterone increase size for those with hypogonadism? Hypogonadism is a medical condition marked by insufficient or impaired functioning of the gonads.14

The gonads are the testes in males and the ovaries in females. Hypogonadism results in decreased production of sex hormones. In males, this is testosterone.

Symptoms of Hypogonadism

Hypogonadism can lead to various symptoms in males, including:

  • Reduced libido
  • Erectile dysfunction
  • Decreased muscle mass
  • Fatigue
  • Mood changes
  • Infertility 

In some cases, it can also affect bone density and lead to osteoporosis.

Hypogonadism Treatment

Treatment for hypogonadism often involves testosterone replacement therapy (TRT). This aims to restore testosterone levels to within the normal range. 

The administration of TRT can happen through various methods, such as:

  • Intramuscular injections
  • Transdermal patches
  • Gels
  • Pellets implanted under the skin 

Goal of TRT

The goal of TRT is to address the health issues associated with low testosterone. But does testosterone increase size? 

The impact of TRT on penile size in men with low testosterone levels is modest. It may not lead to significant changes beyond restoring testosterone levels to the normal range.

Does testosterone increase size?

How Might Testosterone Supplementation Affect Size Among Various Populations?

Does testosterone increase size in different populations? Here’s a breakdown of how testosterone supplementation may differ among various groups:

Does Testosterone Increase Size in Young Adults?

In young adults with normal testosterone levels, the impact of testosterone supplementation on muscle growth may be limited. 

Testosterone levels in young adults are often within the normal range. Thus, extra supplementation may not result in significant muscle growth beyond what is naturally achievable through exercise and proper nutrition.

Testosterone supplementation in young adults is unlikely to have much impact. This is because penile growth is often completed during puberty.

Does Testosterone Increase Size in Older Adults?

In older adults, testosterone levels tend to decline with age. Thus, TRT can have more pronounced effects on muscle growth and general well-being. 

Testosterone supplementation in older adults with low testosterone levels may lead to:

  • Increased muscle mass
  • Improved strength
  • Enhanced quality of life

But, individual responses can vary. The extent of muscle growth achievable through testosterone supplementation may still be influenced by factors like exercise and nutrition.

Penile Growth in Older Adults

Wondering whether testosterone increases size in older adults? Testosterone supplementation is not likely to result in significant changes. 

As mentioned earlier, penile growth occurs during puberty. The impact of testosterone on penile size in adulthood is minimal.

Does Testosterone Increase Size in Men with Specific Medical Conditions?

Testosterone supplementation can have notable effects on muscle growth and penile size in those with specific medical conditions associated with low testosterone levels

For example, people with hypogonadism may experience improvements in:

  • Muscle mass
  • Strength
  • Sexual function

TRT can also reduce symptoms and improve the quality of life in people with clinically low testosterone levels.

Importance of Consulting a Doctor

It’s crucial for people considering testosterone supplementation to consult with healthcare professionals. The professionals with Immortal Male can provide personalized advice to meet your needs.

Does Testosterone Increase Size? Ask Immortal Male

If you’re wondering does testosterone increase size, contact Immortal Male today. Immortal Male is focused on helping you improve your health, longevity, and quality of life with testosterone replacement therapy. 

We offer affordable testosterone replacement therapy (TRT) to help you improve your focus and strength, and have a more confident sex drive. Get access to convenient, high-quality care in your own home with Immortal Male. 

What We Offer

Our comprehensive program offers multiple benefits, such as:

  • Simple and effective at-home testing
  • Fast and discreet delivery
  • Certified doctors and specialists

Contact Immortal Male Today

Feel energized and more confident with testosterone replacement therapy at Immortal Male. Get started today by visiting https://www.immortalmale.com/concierge/.

Journal of Clinical Endocrinology and Metabolism

Stephanie T. Page, John K. Amory, F. DuBois Bowman, Bradley D. Anawalt, Alvin M. Matsumoto, William J. Bremner, J. Lisa Tenover, Exogenous Testosterone (T) Alone or with Finasteride Increases Physical Performance, Grip Strength, and Lean Body Mass in Older Men with Low Serum T, The Journal of Clinical Endocrinology & Metabolism, Volume 90, Issue 3, 1 March 2005, Pages 1502–1510, https://doi.org/10.1210/jc.2004-1933B)