TRT acne fixes on TikTok: what the evidence actually supports

What did @zacsmithfitness actually say?

The creator laid out three levers for managing TRT-related acne: shower at least twice a day, switch to daily injections instead of once or twice weekly, and reduce your dose if you're running too much testosterone. His headline recommendation is clear: "the first lever I would pull is doing daily injections." He also flags the testosterone-to-estrogen conversion as the likely mechanism behind acne when doses are excessive.

To his credit, he's not selling a supplement stack or a miracle protocol. These are practical, low-risk behavioral and dosing adjustments. But the confidence with which he frames them, particularly daily injections as the primary fix, outpaces what the evidence actually shows.

Does the science back this up?

Partly. The estrogen-acne connection is real, but it's not the whole story, and daily injections are not a universally proven fix for TRT acne.

Testosterone-induced acne is driven primarily by androgens stimulating sebaceous glands and altering the skin microbiome, not estrogen alone. A 2019 review by Bhate and Williams in the British Journal of Dermatology confirmed that androgen receptor activation in the skin is the dominant driver of acne in hormonal contexts. Estrogen elevation matters, but framing acne as primarily an estrogen problem oversimplifies the mechanism.

On injection frequency: smaller, more frequent dosing does reduce peak testosterone concentrations, which in theory reduces the androgenic spike that stresses sebaceous glands. A 2021 study by Ramasamy et al. in The Journal of Urology found that men on weekly versus more frequent protocols showed meaningful differences in peak-to-trough testosterone variability. Whether that variability directly translates to less acne is plausible but not yet demonstrated in a controlled trial specifically for acne outcomes.

Twice-daily showering as an acne intervention? The evidence base for that specific claim is thin.

What did they get wrong (or right)?

He got the dosage point right. If you're running supraphysiologic testosterone, you're going to get more androgenic and estrogenic side effects, and acne is high on that list. That's not controversial.

The daily injection advice is directionally reasonable but oversold. The mechanism, smoother hormone levels, is sound pharmacokinetics. But calling it the "first lever" implies it has stronger acne-specific evidence than it does. Daily subcutaneous injections also introduce their own compliance burden and injection site reactions that he doesn't mention.

The showering claim is where he loses credibility. Recommending twice-daily showers as a meaningful acne intervention isn't supported by dermatological literature. Over-washing can actually disrupt the skin barrier, potentially worsening acne in some individuals, according to guidance from the American Academy of Dermatology. Sweat alone is not a primary driver of hormonal acne.

He also conflates testosterone-driven acne with estrogen-driven acne in a way that's imprecise. Estrogen elevation from aromatization is one factor. But the androgen receptor activity from testosterone itself is arguably more directly responsible for sebaceous gland hyperactivity.

What should you actually know?

TRT-related acne is common, manageable, and usually signals something worth reviewing with your prescriber, not just fixing with a shower schedule.

Clinically, the workup for TRT acne should include checking total testosterone, free testosterone, estradiol, and SHBG. If estradiol is elevated disproportionately, that's actionable. If free testosterone is too high, dose adjustment is the right call. Daily versus weekly injection frequency is a legitimate clinical conversation, but it's one to have with your provider based on your bloodwork, not based on a TikTok framework.

Topical treatments like adapalene or benzoyl peroxide remain first-line for mild acne regardless of the cause. In persistent or cystic cases, a dermatologist familiar with hormonal acne is worth seeing. Some men on TRT do well with low-dose oral antibiotics or topical retinoids while their hormone levels are being dialed in.

• Get labs before changing your protocol. Acne alone isn't a reliable indicator of whether the issue is estrogen, free testosterone, or something else entirely.
• Daily injections are not a proven acne treatment. They may help by smoothing hormone peaks, but don't expect a guaranteed result.
• Twice-daily showering is not a clinical recommendation for hormonal acne. Good hygiene matters, but over-washing has its own risks.