What did @formerfatguyfitness actually say?
Two months into TRT, this creator listed three side effects he's personally experiencing: acne across his chest, back, and shoulders; spontaneous, prolonged erections with no stimulation; and increased irritability and aggression. He also mentioned he's on HCG alongside testosterone, has started "Retta" (likely a reference to Retatrutide or a similar peptide), and is considering BPC-157. He frames the irritability as the most serious of the three.
To his credit, he's not selling a miracle. He's describing a lived experience, and the three side effects he names are all real, documented phenomena in men on exogenous testosterone. That part deserves credit. But his casual mention of stacking peptides like BPC-157 alongside TRT, without any real clinical framing, is where the video starts getting sloppy.
Does the science back this up?
Yes, on all three counts, the underlying biology checks out. The mechanisms are well-established, even if his descriptions are anecdotal.
Acne from TRT is driven by androgens stimulating sebaceous glands. A 2017 review by Melnik in the Journal of the European Academy of Dermatology and Venereology confirmed that exogenous testosterone increases sebum production, often causing acne flares, particularly on the back and chest, within the first few months of therapy. This is consistent with what he describes.
Spontaneous erections are a documented early effect of TRT in men with pre-treatment low testosterone. When levels normalize or exceed baseline, the erectile response can become hyperactive. Buvat et al. (2013, Journal of Sexual Medicine) noted that some men in the early weeks of TRT report unpredictable erections as nitric oxide pathways become more responsive to baseline circulating testosterone.
Irritability and mood changes are more complicated. Testosterone has bidirectional effects on mood depending on baseline levels, the rate of increase, and individual sensitivity. A 2019 study by Walther et al. in Psychoneuroendocrinology found that supraphysiological testosterone levels, not just high-normal, were more consistently associated with irritability and aggression in some men.
What did they get wrong (or right)?
Mostly right on the symptoms. The framing around irritability needs more nuance, though.
He says "overall, it makes you a little more aggressive," which is a generalization that does not hold for every man on TRT. The research is clear that aggression is not a universal outcome. Zarrouf et al. (2009, Journal of Psychiatric Practice) reviewed multiple trials and found no significant increase in aggressive behavior in men receiving testosterone at physiological replacement doses. The "roid rage" association is mostly tied to supraphysiological doses used in non-medical contexts.
His irritability may be real, and it is worth monitoring, but presenting it as an expected outcome of TRT without acknowledging dose, individual variation, or the possibility of too-rapid escalation is incomplete. The fact that he says he started two months ago and is already considering additional compounds like BPC-157 without mentioning medical supervision is a pattern worth flagging.
One more issue: he mentions "Retta" without explanation. If this is Retatrutide, that is a GLP-1/GIP/glucagon receptor triple agonist that is not FDA-approved and is only available through compounding pharmacies or research channels. Stacking that with TRT and HCG at two months in, without elaborating on oversight, is not a model any clinician would endorse.
What should you actually know?
These three side effects are real, but their severity and likelihood depend heavily on your starting testosterone levels, your dose, the rate of titration, and whether someone is actually monitoring your labs.
Acne is manageable. Topical retinoids and benzoyl peroxide work for most men. Some need a short course of oral antibiotics. If acne is severe, a prescribing clinician should know.
Spontaneous erections in the early weeks of TRT typically normalize once levels stabilize. If they do not, or if erections become painful or prolonged beyond four hours, that crosses into a medical concern.
The irritability signal is real but nuanced. If you notice mood changes, the appropriate response is to discuss dose timing and levels with your provider, not to just tolerate it. Hematocrit, estradiol levels, and testosterone trough values all affect how you feel.
Finally, peptides like BPC-157 are not FDA-approved. Their safety profile in combination with TRT has not been studied in clinical trials. Mentioning them in a TikTok alongside TRT, as though they are a natural next step, normalizes combinations that carry unknown risks. A regulated telehealth provider will not casually stack these without documented clinical rationale.