Content Team (Proofread by Dr. Peter Fotinos) Jan 7, 2021 9:28:18 AM 8 min read

Myth: Testosterone Makes Your Penis Shrink

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One of the strangest myths about testosterone is that it makes your penis shrink. Many still believe that bodybuilders who are 'stacked' full of testosterone have small penises. This myth is absolutely untrue.

Testosterone Can Reduce Fertility and Testicle Size (but for many, this is no problem!)

Testosterone can shrink your testicles. The average decrease in size is up to 25%, but many men see no difference at all. There can also be a reduction in sperm production when taking TRT. Importantly, though, if you are not planning on having children, this is no problem.

In fact, the World Health Organisation (WHO) has conducted studies exploring TRT as a contraceptive for men. Ironically despite TRT's positive effect on sexual function, it has a negative impact on fertility. Doctors can also prescribe medicines to help protect fertility for men who wish to have children, such as Clomid.

Clomid as an Alternative?

Clomid (Clomiphene citrate), for example, can be used to protect fertility in men on TRT and can also be used to increase testosterone levels as an alternative to traditional TRT. It attaches to the estrogen receptors in the pituitary. It makes your brain think that you don't have enough testosterone and, as a result, the pituitary sends a signal to your testicles telling them that they need to ramp up testosterone and sperm production. Clomid is known as a selective estrogen receptor modulator or SERM for short. 

Alternatively, doctors give human chorionic gonadotropin (HCG) to boost testosterone and sperm production as well. HCG mimics a hormone known as LH or luteinizing hormone. This hormone tells your cells in your testicles to ramp up the production of both testosterone and sperm.

Studies show that Clomid can be an effective medication for increasing testosterone levels but is not approved by the FDA for treating it. Clomid is usually prescribed by doctors to treat infertility in women and is approved for this; however, it can be prescribed 'off label' to men.

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Low Testosterone Can Kill Libido and Cause Erectile Dysfunction

Low testosterone or reduced testosterone can cause all sorts of issues with your undercarriage due to being overweight, having excess visceral fat, poor body image, low energy levels, and no sex drive. By optimizing your testosterone, you will undoubtedly give your sex drive a boost. 

The most important aspect of getting a good erection is your heart and good blood flow. As your testosterone levels decline, men usually find it harder to find the motivation to exercise, lose excess weight, and often bad cholesterol becomes an issue. More often than not, these factors lead to furring up of your arteries and eventually restricted blood flow to the penis. Ultimately making it harder to get hard!

Testosterone therapy, along with a healthy lifestyle and exercise, can give you back the desire, the ability, and the improvement in blood flow required to get bigger and harder erections. Testosterone therapy can also be used alongside traditional E.D medication like generic daily Cialis® for those that really struggle to get and keep an erection long enough for penetrative sex.

Kallmann Syndrome

Testosterone therapy is also often effective in treating a rare condition where guys are born with a 'micropenis' called Kallmann syndrome. Testosterone therapy is reported to even work on guys with undiagnosed Kallmann syndrome and can increase penile length allowing for improved sexual function, even in later life. 

So, No Testosterone Does Not Shrink Your Penis!

As you now know, testosterone won't shrink your penis; however, it will reduce fertility and, in some cases, shrink your testicles a little. This loss of fertility is no big deal for most guys because, by the time you reach an age where your testosterone levels are falling, you will have had your children and will be looking for ways to improve your health and live a longer, happier life.

The advantages of testosterone therapy, such as increased libido, increased stamina, more lean muscle, and less visceral fat, mean that you will be able to live longer, play harder, and recover faster.

Disclaimer: Information provided on this page is not a substitute for professional medical advice, diagnosis, or treatment. If you have any questions or concerns about your health, please feel free to contact us or consult your doctor.

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References:

Moskovic DJ, Katz DJ, Akhavan A, Park K, Mulhall JP. Clomiphene citrate is safe and effective for long-term management of hypogonadism. BJU Int. 2012 Nov;110(10):1524-8. doi: 10.1111/j.1464-410X.2012.10968.x. Epub 2012 Mar 28. PMID: 22458540.

Bin-Abbas B, Conte FA, Grumbach MM, Kaplan SL. Congenital hypogonadotropic hypogonadism and micropenis: effect of testosterone treatment on adult penile size why sex reversal is not indicated. The Journal of pediatrics. 1999;134(5):579-583.

“We conclude that 1 or 2 short courses of testosterone therapy in infancy and childhood augment penile size into the normal range for age in boys with micropenis secondary to fetal testosterone deficiency.”

“Further, the results of this study do not support the notion, derived from data in the rat, that testosterone treatment in infancy or childhood impairs penile growth in adolescence and compromises adult penile length.”

 Paiva KC de C, Bastos AN, Miana LP, et al. Biometry of the hypospadic penis after hormone therapy (testosterone and estrogen): A randomized, double-blind controlled trial. Journal of pediatric urology. 2016;12(4):200.e1-6. doi:10.1016/j.jpurol.2016.04.013

“Preoperative use of topical testosterone increases penile size, diameter of the penis and glans.”

Baskin LS, Sutherland RS, DiSandro MJ, Hayward SW, Lipschutz J, Cunha GR. The effect of testosterone on androgen receptors and human penile growth. J Urol. 1997 Sep;158(3 Pt 2):1113-8. doi: 10.1097/00005392-199709000-00108. PMID: 9258152.

“These experiments support the hypothesis that penile growth cessation is mediated by mechanisms other than down regulation of the androgen receptor. Furthermore, these data support the hypothesis that early administration of androgen to prepubertal male individuals does not result in a shorter phallus in adulthood.”

Canguven O, Talib RA, El-Ansari W, Shamsoddini A, Salman M, Al-Ansari A. RigiScan data under long-term testosterone therapy: improving long-term blood circulation of penile arteries, penile length and girth, erectile function, and nocturnal penile tumescence and duration. Aging Male. 2016 Dec;19(4):215-220. doi: 10.1080/13685538.2016.1230602. Epub 2016 Oct 1. PMID: 27690744.

“No significant changes in penile length were observed.”