HCG and TRT: what the 'pullout game' joke reveals about fertility risks

What did @markusfit actually say?

Markus laid out a specific HCG protocol for his TRT cruise phase: reconstituting a 12,000 IU vial with 6 mL of bacteriostatic water to get 2,000 IU/mL, then injecting 0.25 mL (500 IU) twice weekly into muscle for a total of 1,000 IU per week. He also clarified syringe markings for slim pins, said he runs this for "8 to 12 weeks" before blasting again, and disclosed he sources his HCG from Transcend HRT.

That's actually more math transparency than most TRT content creators bother with. He walked through unit conversion, syringe volume, and injection frequency in plain language. That part deserves credit. The problems, though, are in the details.

Does the science back this up?

Partially. HCG at lower doses during a testosterone cruise is a real, studied practice, primarily for preserving testicular function and endogenous LH-axis activity. But 1,000 IU per week is on the higher end of what the literature supports for that goal.

A 2005 study by Coviello et al. in the Journal of Clinical Endocrinology and Metabolism found that 125 IU every other day (roughly 437 IU/week) was sufficient to maintain intratesticular testosterone in men on exogenous testosterone. A 2013 analysis by Wenker et al. in the Journal of Urology confirmed that lower-dose HCG protocols were effective for preserving fertility markers during TRT. Neither study found meaningful added benefit from doses above 500 IU every other day. At 1,000 IU/week, you're likely not getting more benefit, but you may be getting more estradiol conversion and more desensitization of Leydig cell LH receptors over time.

What did they get wrong (or right)?

The math is right. The reconstitution logic, the unit conversion, the syringe markings explanation, all accurate. That's genuinely useful harm-reduction content for people who are already using HCG and fumbling with vials.

What's questionable is the dose framing. Calling 1,000 IU/week a standard cruise protocol without noting that research supports much lower doses is misleading by omission. Injecting HCG "into meat" (intramuscularly) is also worth flagging. HCG is typically administered subcutaneously in clinical protocols. A 2017 review in Fertility and Sterility by Boehm et al. noted subcutaneous delivery produces comparable bioavailability with less discomfort. IM injection isn't dangerous, but it's not the evidence-based default either.

The 8-to-12-week cruise framing is also presented without any context about what the "blast" involves, which matters a great deal for risk assessment.

What should you actually know?

HCG during a testosterone cruise is used to keep the testes producing some testosterone and to preserve fertility potential. That's a legitimate clinical goal. But the dose matters, and more is not better here.

Chronic supraphysiologic HCG use can desensitize LH receptors on Leydig cells, which is the opposite of what most users want long-term. A 2009 study by Liu et al. in the Journal of Clinical Endocrinology and Metabolism documented Leydig cell desensitization with high-frequency HCG dosing. Most clinical providers managing TRT with HCG now use 250 to 500 IU twice weekly at most, not 1,000 IU/week as a floor.

The syringe tutorial is genuinely helpful for people already prescribed HCG who are confused about unit markings. But this video presents one person's self-administered protocol as a template, without a prescriber in the frame. If you're considering HCG as part of a TRT protocol, that conversation needs to happen with a licensed provider who can check your LH, FSH, and estradiol, not from a TikTok reconstitution demo.

Bottom line on the claims

The technical content here is better than average for TRT social media. The math is solid, the syringe explanation is clear, and at least he disclosed his source. But 1,000 IU/week sits above what the peer-reviewed evidence supports for cruise-phase HCG, the IM injection route isn't standard, and there's zero mention of monitoring estradiol, which rises predictably with HCG use. Those are real gaps.