Does TRT actually cause hair loss, or is genetics doing the work?

What did @alphaclubsupps actually say?

The creator's core claim is simple: TRT can accelerate hair loss, but only if you're already genetically wired for it. His exact framing was "if you have a predisposition to male pattern baldness, TRT can be a bit of an issue" and if you don't, "it's not so much of a concern." He then pivoted to a personal cost-benefit argument: at 46 and already thinning, the quality-of-life gains from TRT outweigh worrying about his hair.

That's actually a more nuanced take than most TikTok testosterone content delivers. He's not saying TRT is harmless for everyone. He's not promising you'll keep a full head of hair. He's making a conditional claim tied to genetics, then layering in a personal values statement. Those are two different things, and it's worth separating them.

Does the science back this up?

Mostly, yes. The genetics piece is well-supported. Male pattern baldness, or androgenetic alopecia, is driven by dihydrotestosterone (DHT), a metabolite of testosterone converted by the enzyme 5-alpha reductase. Men with androgen receptor sensitivity in hair follicles, largely a genetic trait, lose hair faster when DHT rises. Raising testosterone through TRT increases the substrate available for DHT conversion.

Randall (2008, Journal of Endocrinology) summarized the androgen-hair follicle relationship clearly: follicle sensitivity to androgens is genetically programmed, and that sensitivity, not circulating androgen levels alone, determines hair loss trajectory. Trüeb (2002, Experimental Gerontology) confirmed that men without the genetic predisposition do not reliably develop androgenetic alopecia even with elevated androgens.

The "not so much of a concern" qualifier for non-predisposed men holds up in the literature. But it's not zero risk, and the creator glosses over that distinction.

What did they get wrong (or right)?

He got the genetics-dependent mechanism right. That's the honest answer to the question, and most influencers dodge it entirely.

What he underplays: the predisposition is more common than people realize. Androgenetic alopecia affects roughly 50% of men by age 50, according to Norwood (1975, Archives of Dermatology), a figure that's held across multiple population studies. So "I probably don't have the predisposition" is actually a coin flip for a lot of his audience, not a safe assumption.

He also doesn't mention that TRT can accelerate the timeline even in men who would have eventually lost hair anyway, not just confirm a fate. If you were going to start thinning at 55, supraphysiologic or high-normal testosterone levels could move that to 40. That's a meaningful distinction for a younger audience.

The cost-benefit framing at the end is a personal opinion, not a medical claim. That's fine. But presenting it as a universal "is it that much of a concern" dismisses a legitimate side effect some men care deeply about.

What should you actually know?

If hair loss is a concern for you and you're considering TRT, there are things worth understanding before you start.

• DHT is the actual driver. Testosterone itself has a weaker androgenic effect on follicles than DHT. If you're predisposed, the enzyme 5-alpha reductase activity in your scalp is what matters most.
• Finasteride is sometimes co-prescribed with TRT to block 5-alpha reductase conversion and reduce DHT. This has its own side effect profile, including potential sexual side effects, that requires a real clinical conversation, not a TikTok comment.
• Not all testosterone formulations raise DHT equally. Topical gels applied to the skin tend to produce higher DHT levels relative to injections, because skin contains high concentrations of 5-alpha reductase. Testosterone cypionate injections typically produce more moderate DHT elevations. Zitzmann et al. (2001, Journal of Clinical Endocrinology and Metabolism) documented these formulation-dependent differences.
• Family history is the single best predictor, but it's not a guarantee in either direction. Your maternal grandfather's hairline is relevant data. So is your paternal grandfather's.
• If you're already on TRT and noticing accelerated shedding, that's a clinical signal worth raising with your prescriber, not just accepting.

The creator's personal calculation, that feeling well and performing well is worth more than hair, is a legitimate individual choice. But that tradeoff belongs in a conversation with a clinician who knows your labs and your history, not a 30-second clip.