Does aging actually shrink your penis? TRT claims, fact-checked

What did @jeremygoodmanmd actually say?

The claim is blunt: your penis gets smaller as you age, just like you get shorter, heavier, and weaker. @jeremygoodmanmd, who identifies himself as a urologist, told his 2.2 million viewers that penile shrinkage is a real aging phenomenon, but one that can be countered. His pitch lands on testosterone optimization, framed as a path to "bigger and better pickles." He closes with a promise of "real science, not bro science." Fair enough. Let's hold him to that standard.

The video is short, casual, and leans hard on the alarm-then-reassure structure common in medical TikTok. Scare you with a fact, sell you a solution. That doesn't automatically make the underlying claims wrong, but it does mean they deserve more scrutiny than a 30-second clip provides.

Does the science back this up?

On the core claim, yes, mostly. Penile length does appear to decrease measurably with age, and the mechanisms are reasonably well understood. The connection to testosterone is real but more complicated than the video implies.

A 2012 study by Wessells et al., published in the Journal of Urology, established normative penile length data and noted that vascular and connective tissue changes with aging affect erectile tissue. Separately, research on Peyronie's disease and collagen accumulation in the tunica albuginea, reviewed by Tal et al. (2012, Journal of Sexual Medicine), shows that fibrous tissue replacement of smooth muscle is a documented aging process that can reduce functional length.

On testosterone: low T is associated with reduced penile health, including atrophy of erectile tissue when androgen levels drop significantly. A study by Traish et al. (2011, Journal of Andrology) found that hypogonadism leads to structural changes in penile smooth muscle and that testosterone therapy can partially reverse these changes in men with documented deficiency. The keyword is documented deficiency. The video doesn't make that distinction.

What did they get wrong (or right)?

Credit where it's due: the underlying physiology is not fabricated. Penile shortening with aging is a real, documented phenomenon. Testosterone does play a role in maintaining penile tissue health. A urologist saying these things is not practicing bro science.

But here's where the video earns skepticism. The phrase "bigger and better pickles" conflates two separate things: preventing age-related atrophy in hypogonadal men, and increasing penis size as a general outcome of TRT. Those are not the same claim. The evidence supports the former in men with confirmed low testosterone. It does not support the idea that TRT is a general penile enlargement strategy for normally aging men with normal hormone levels.

The video also skips entirely over the distinction between penile shrinkage caused by low testosterone versus shrinkage caused by vascular disease, weight gain (suprapubic fat pad obscuring base length), or collagen changes unrelated to hormones. TRT does not fix all of those. Conflating them is misleading, even if unintentional.

Calling this "real science" while omitting those distinctions is a stretch. The science is real. The framing is optimistic to the point of being incomplete.

What should you actually know?

If you're concerned about changes in penile length or sexual function, the starting point is a clinical evaluation, not a TikTok comment section. That means a blood test for total and free testosterone, an assessment of cardiovascular health (since erectile tissue health tracks closely with vascular health), and a look at body composition. Weight loss alone, by reducing suprapubic fat, can restore apparent penile length without any hormone intervention.

TRT is an FDA-approved treatment for hypogonadism, defined clinically as low testosterone with corresponding symptoms. It is not a blanket anti-aging upgrade or a size enhancement tool for men with normal hormone levels. The risks of TRT, including polycythemia, infertility, and cardiovascular considerations, are real and require physician oversight.

If you have symptoms of low testosterone, including fatigue, reduced libido, and changes in body composition, seeing a qualified provider is legitimate advice. But the threshold for starting TRT should be clinical, not cosmetic. A 2021 review by Bhasin et al. in the New England Journal of Medicine remains the most current high-quality summary of TRT evidence, and it does not support treating men with normal testosterone levels for the purpose of penile enhancement.