TRT dose vs. 'enhanced' bodybuilding: what the evidence says

What did @mikeyjamroz actually say?

The creator, who disclosed being on a "TRT dose" of performance enhancing drugs, argued that hair transplants are not pointless for people on testosterone because transplanted follicles come from the back and sides of the scalp, which are "DHT resistant." His core claim: the transplanted hairs "I'm never gonna lose them." He acknowledged that native, non-transplanted hairs at the crown remain at risk, and recommended finasteride, which he says blocks "75% of DHT conversion," as a protective measure alongside minoxidil.

He was transparent about the trade-off. He did not claim he is risk-free, just that the transplanted grafts themselves carry a different biological profile. That kind of nuance is rarer than it should be on a platform where most hair loss content is either fear-mongering or supplement advertising.

Does the science back this up?

Mostly, yes. The concept of donor dominance, the idea that transplanted follicles retain the genetic programming of their original location, is well established and forms the entire theoretical foundation of modern hair transplant surgery.

The principle was first described by Norman Orentreich in 1959 in the Annals of the New York Academy of Sciences. His landmark donor dominance hypothesis showed that occipital follicles transplanted to balding regions continued to behave as if they were still at the donor site, resisting miniaturization. Decades of clinical outcomes have broadly supported this. A 2020 review by Jimenez et al. in the Journal of Drugs in Dermatology confirmed that appropriately selected donor follicles maintain long-term retention after transplantation in androgenic alopecia patients.

On finasteride: the 75% DHT reduction figure is actually in the right ballpark. The pivotal phase III trials, specifically Kaufman et al. (1998, Journal of the American Academy of Dermatology), found that 1mg oral finasteride reduced scalp DHT by approximately 64-69% and serum DHT by around 68%. Some studies cite higher numbers depending on the dose. The creator is not wildly off.

What did they get wrong (or right)?

The claim that transplanted hairs will be lost "never" is where things get slightly oversimplified, but not dangerously wrong. The scientific literature is more cautious. Donor dominance is real, but it is not absolute.

A 2022 paper by Singh and Mysore in the International Journal of Trichology noted that in the context of supraphysiological androgen exposure, including anabolic steroid use, the protective effect of donor dominance may be attenuated over time. Long-term follow-up data in men on sustained high-dose androgens is limited, and most transplant outcome studies are conducted in men with natural testosterone levels. The creator is right that the risk profile is lower for transplanted follicles, but "never" is doing a lot of work in that sentence.

What he got right, and deserves credit for: accurately describing DHT's mechanism of follicle miniaturization, correctly identifying the anatomical basis of transplant graft selection, and being honest that the non-transplanted crown hairs remain vulnerable. That is a more complete picture than most TikTok hair content delivers.

What should you actually know?

If you are on testosterone therapy, whether prescribed TRT or otherwise, your hair loss risk is real and depends on your individual androgen sensitivity, your baseline DHT levels, and your genetic predisposition. Testosterone is converted to DHT primarily by the enzyme 5-alpha reductase, and finasteride inhibits that enzyme. It genuinely works for most men with androgenic alopecia.

However, finasteride is not a casual add-on. It has documented side effects including sexual dysfunction, depression, and in rare cases, post-finasteride syndrome, a contested but reported condition. A clinical consultation is not optional here, it is the starting point. Minoxidil, while generally safer, is a vasodilator that requires consistent application and does not address the androgen pathway at all.

For anyone considering a hair transplant while on or planning testosterone therapy, the transplanted follicles are likely to hold up better than native ones. But the donor area is finite. If androgens accelerate loss of remaining native hair aggressively, future transplant options shrink. Plan with a dermatologist who knows your hormone context, not just a transplant surgeon working in isolation.