Does TRT actually make 'Junior' grow? Separating hype from hormones

What did @king_elrey01 actually say?

The creator made two distinct claims about testosterone replacement therapy side effects: that "a major side effects is hair loss" and that testosterone makes "Junior low-maki" (grow bigger). The audio is partially unclear, with some phrases appearing garbled or mixed with Tagalog slang, but the core claims about hair loss and genital changes on TRT come through. The caption's "Si Junior lumaki" directly translates to something growing bigger, which in context refers to the penis or testicles.

To be fair, this is a short, casual TikTok reply, not a medical lecture. But 31,000+ people watched it, and health claims don't get a pass just because the delivery is comedic.

Does the science back this up?

Hair loss as a TRT side effect: partially yes. The genital growth claim: mostly no, and the direction of the effect actually tends to go the other way for testicles specifically.

On hair loss, testosterone converts to dihydrotestosterone (DHT) via the enzyme 5-alpha reductase. DHT is the primary driver of androgenetic alopecia in genetically susceptible men. Exogenous testosterone does raise DHT levels, which can accelerate hair thinning in men who are already predisposed. This is well-documented. Traish et al. (2011, Journal of Sexual Medicine) confirmed that DHT elevation is a real downstream effect of testosterone therapy.

On genital size, here is where things get murkier. Exogenous testosterone suppresses LH and FSH through negative feedback on the hypothalamic-pituitary axis. That suppression causes testicular atrophy, not growth. The testicles shrink on TRT without concurrent hCG use. As for penile size in adult men, there is no credible evidence that TRT increases it. Penile growth from androgens is a puberty phenomenon, not an adult one.

What did they get wrong (or right)?

Hair loss: credit where it is due. This is a real, documented TRT side effect, though it is worth noting it is not universal. It depends heavily on genetic predisposition. The claim is mostly accurate but presented without nuance.

"Junior growing" in adult men on TRT: this is where the video earns scrutiny. If the claim is that the penis grows larger in adult men taking testosterone, the science does not support that. Snyder et al. (2016, New England Journal of Medicine) in the Testosterone Trials found no penile elongation as an outcome. More relevant, testicular volume actually decreases on TRT. Coviello et al. (2005, Journal of Clinical Endocrinology and Metabolism) showed that exogenous testosterone suppresses intratesticular testosterone, which is what drives spermatogenesis and testicular size. Atrophy, not growth, is the documented outcome.

The creator also mentions something about being "scoped from a bat and to mass," which is too garbled to fact-check meaningfully. Claims that cannot be understood cannot be evaluated.

What should you actually know?

TRT has a real side effect profile that deserves honest communication, not exaggeration in either direction. Hair loss is a legitimate concern for genetically susceptible men and should be discussed with a prescribing clinician before starting therapy. DHT-blocking strategies exist, though they carry their own trade-offs.

Testicular atrophy is one of the most common and least-discussed TRT side effects. Research by Schlegel (2012, Fertility and Sterility) estimated that exogenous testosterone causes azoospermia in a significant percentage of men, and testicular volume reduction accompanies this. Men who want to preserve fertility or testicular size often use hCG alongside TRT, but that is a clinical decision, not a DIY one.

If you are considering TRT based on social media content, the actual starting point is lab work confirming hypogonadism, a licensed clinician reviewing your history, and a frank conversation about what TRT actually does versus what TikTok says it does. The two are not always the same thing.