What did @jeremygoodmanmd actually say?
The claim here is actually two-part. First, TRT will not increase penile size. Second, testicular atrophy from TRT can create an optical illusion where the penis appears relatively larger because the testicles shrink. He also teases a separate procedure he calls "BPG" or "bigger pickle girth" as a penile filler option for men who actually want size gains.
To his credit, the core anatomical framing is correct. TRT does not grow penile tissue in adult men. And testicular atrophy is a well-documented, common side effect of exogenous testosterone. So the proportional visual change he describes is physiologically grounded, even if the delivery is pure TikTok bro-medicine.
The pivot to advertising penile filler at the end deserves its own scrutiny, which we'll get to.
Does the science back this up?
Yes, mostly. Exogenous testosterone suppresses the hypothalamic-pituitary-gonadal axis. When the brain stops signaling the testes to produce testosterone, the testes lose their primary functional stimulus and atrophy. This is not rare or theoretical. It is the expected physiological outcome.
Coviello et al. (2004, Journal of Clinical Endocrinology and Metabolism) demonstrated that exogenous testosterone administration significantly suppresses luteinizing hormone and follicle-stimulating hormone, directly causing testicular volume reduction. Studies on men undergoing androgen-based male contraception protocols have shown testicular volume decreases of 20-25% over several months of use.
On penile size: adult penile length is not meaningfully altered by testosterone in men with normal baseline androgen receptor function. Testosterone drives penile growth during puberty via androgen receptor stimulation, but once that developmental window closes, supplemental testosterone does not replicate that growth in adult tissue. A 2020 review in Sexual Medicine Reviews confirmed no evidence supports penile elongation from TRT in adult hypogonadal men.
What did they get wrong (or right)?
He got the testicular atrophy claim right. He got the "TRT won't grow your penis" claim right. Those are both accurate statements that many TRT enthusiasts either misunderstand or actively misrepresent online, so giving credit where it is due matters here.
What deserves scrutiny is the breezy segue into advertising "pickle filler," which appears to reference penile filler injections, a real but poorly regulated aesthetic procedure. Penile filler (typically hyaluronic acid-based) is not FDA-approved for this indication. Complications including lumping, asymmetry, vascular injury, and infection are well-documented in the literature. Egydio and Kuehhas (2018, International Journal of Impotence Research) reviewed outcomes and noted that complication rates vary widely depending on injector experience and product used.
Casually marketing this procedure under a cutesy acronym like "BPG" in a viral TikTok without disclosing those risks is a legitimate concern. The anatomy joke does not excuse the advertisement.
What should you actually know?
If you are on TRT or considering it, testicular atrophy is real and predictable. The degree varies by dose, frequency, and individual response. Human chorionic gonadotropin (hCG), when used alongside TRT, can preserve testicular volume by mimicking LH stimulation. Liu et al. (2002, Journal of Clinical Endocrinology and Metabolism) found that hCG co-administration maintained intratesticular testosterone and testicular size in men on exogenous testosterone protocols.
Fertility is a separate but related concern. Exogenous testosterone suppresses sperm production. Men who want to preserve fertility should have a frank conversation with a urologist or reproductive endocrinologist before starting TRT, not just a TikTok doctor.
On penile filler: if you are considering it, do not let a viral video be your informed consent. This is an off-label procedure with real complication potential. Research the provider's credentials, the specific product being used, and ask for their documented complication rate. This is not a spa service.
The bottom line
The core anatomy in this video is accurate. TRT does not enlarge the penis in adults, and testicular atrophy is a legitimate and common side effect that affects the visual proportion he describes. The science supports those points. What it does not support is treating penile filler as a casual upsell in a 30-second TikTok without any risk disclosure. The medical facts are fine. The marketing framing is not.