What did @harleymeds.com actually say?
The creator's core argument is that estrogen blockers "suck" for men on TRT, that clinics automatically prescribing them will "pre-crash your estrogen" and make you feel terrible, and that only "5 to 10% of men on proper doses" actually need one. The video ends with a call to comment for a clinic referral, which is worth keeping in mind when evaluating the framing.
To be fair, the general direction here is not wrong. The reflexive prescribing of aromatase inhibitors (AIs) as a standard add-on to TRT is a legitimate clinical controversy, and plenty of endocrinologists share this concern. But the way it's packaged in this video trades nuance for a confident-sounding number that doesn't come from anywhere obvious in the published literature.
Does the science back this up?
Partly. The concern about over-prescribing AIs is real and documented. A 2017 paper by Helo et al. in the Journal of Sexual Medicine found that many men on TRT who were also prescribed AIs ended up with suppressed estradiol levels, which correlated with decreased bone mineral density and sexual dysfunction. Low estrogen in men is not a neutral outcome. It causes joint pain, mood instability, reduced libido, and bone loss.
The Endocrine Society's clinical practice guidelines do not recommend routine AI use alongside TRT. They suggest treating symptoms and monitoring labs, not prophylactically suppressing estradiol. So the creator is aligned with mainstream endocrinology on the general principle. Where things get shaky is the specific "5 to 10%" figure. That number appears to have no published basis. The actual proportion of men who develop symptomatic hyperestrogenism requiring pharmaceutical management is not precisely quantified in the literature in that way.
What did they get wrong (or right)?
They got the core message approximately right: routine AI prescribing on TRT is not supported by evidence, and crashing estrogen causes real harm. Credit where it's due.
But the "5 to 10%" claim is presented as established fact when it reads more like a number someone made up to sound specific. There is no landmark study citing that figure. That matters because TikTok audiences often treat confident statistics as citations.
The phrase "proper dosages" does a lot of work in this video without being defined. A man on a supraphysiologic dose, which some TRT clinics do prescribe, will aromatize more testosterone to estradiol and is far more likely to need management. "Proper dose" framing sidesteps that entirely. Additionally, individual aromatase activity varies significantly based on body fat percentage, genetics, and age (Loves et al., 2008, European Journal of Endocrinology). Some men genuinely do convert more aggressively at the same dose.
What should you actually know?
Estradiol is not your enemy on TRT. Men need estrogen for bone health, cardiovascular function, cognitive performance, and libido. A 2016 study by Finkelstein et al. in the New England Journal of Medicine demonstrated that sexual function and bone density in men depend on estradiol, not just testosterone. Tanking your estrogen to "feel more like a man" is the opposite of evidence-based.
That said, some men do develop genuinely elevated estradiol on TRT with symptomatic consequences: gynecomastia, water retention, mood changes. In those cases, a low-dose AI can be appropriate under physician supervision with lab monitoring. The decision should be driven by symptoms plus bloodwork, not by clinic default protocols or by a blanket rule that only 5 to 10% of men ever need intervention.
If your clinic is prescribing an AI before you even start TRT or without checking your estradiol levels, that is a red flag worth raising. But so is any TikTok video using a suspiciously tidy statistic to sell you a clinic referral at the end.
Bottom line
The creator's skepticism toward reflexive AI prescribing is legitimate and consistent with clinical guidelines. The specific "5 to 10%" figure is unsupported. The framing ignores individual variation in aromatase activity and dose-dependent effects. And the affiliate referral at the end is a conflict of interest the viewer deserves to know about when weighing this advice.