What did @official.justin.bucki actually say?
The creator walked through a technique called "back loading," where you draw testosterone from a vial using a standard 20-gauge needle, then transfer the oil into an insulin syringe by removing the plunger and injecting the oil directly into the barrel. The goal is to avoid the slow, frustrating process of pulling thick testosterone oil through an insulin syringe's tiny needle. He also noted he injects "two to three times a week" himself, presenting daily injections as a preference rather than a protocol requirement.
The video is framed as a practical hack for people already doing subcutaneous testosterone injections, not as medical advice on whether to do them. That framing matters when evaluating it fairly.
Does the science back this up?
The pharmacokinetics here are sound in principle. Subcutaneous testosterone injections do produce more stable serum levels compared to intramuscular administration, and smaller, more frequent doses reduce the peak-to-trough swing in total testosterone. That part is well-supported in the literature.
On the backloading method itself, the technique has circulated in harm-reduction and TRT communities for years and is mechanically logical. Testosterone cypionate and enanthate are suspended in oil-based carriers, and oil viscosity makes it genuinely difficult to draw through a 28- or 29-gauge insulin needle. Transferring via an open barrel sidesteps that problem without altering the drug. A 2017 review by Kaminetsky et al. in Therapeutic Advances in Urology noted that subcutaneous administration of testosterone is a clinically viable route, though it studied pre-filled preparations rather than patient-loaded insulin syringes specifically. No peer-reviewed study has formally evaluated backloading as a preparation method, which means its sterility assumptions rest on logic rather than controlled data.
What did they get wrong (or right)?
He got the core mechanics right. The backloading process itself works, and the time-saving rationale is legitimate. Drawing oil through a narrow-gauge needle can take several frustrating minutes and may damage the needle tip before injection.
Where the video falls short is sterility guidance. He says to use "a sterile surface," but that single phrase does the heavy lifting for what is actually the most contamination-prone step in the entire process. Removing a syringe plunger exposes the interior barrel to ambient air, skin particles, and surface contaminants. The CDC's guidelines on injection safety emphasize that any break in a closed system introduces contamination risk. He does not mention alcohol-wiping the barrel opening, working near an air vent or fan, or what counts as a sterile surface. For a largely self-taught injection community, those omissions are not trivial.
He also does not flag that this technique requires the user to already have a proper clinical setup, including prescribed medication, proper sharps disposal, and ideally some hands-on training. Presenting it as a one-minute hack without that context could encourage people who are not prepared to attempt injections unsafely.
What should you actually know?
Subcutaneous testosterone injections are a legitimate, clinically-used administration route. A 2021 study by Spratt et al. in Journal of Clinical Endocrinology and Metabolism confirmed that subcutaneous delivery produces adequate absorption with potentially less injection-site discomfort for many patients. The preference for daily versus twice-weekly injections is a real clinical conversation, not just a bro-science debate. More frequent, smaller doses do tend to produce flatter hormone curves, which some patients and clinicians prefer.
The backloading method is mechanically reasonable but sits outside any formal clinical protocol. If you are on a prescribed testosterone regimen through a licensed provider, the right move is to ask your prescribing clinician or pharmacist about preparation technique rather than relying on a social media video, however accurate the underlying principle might be. Sterile technique is not intuitive, and contaminated injections carry real risks including abscess formation and systemic infection.
- Subcutaneous testosterone is a recognized clinical route, not a fringe approach.
- Backloading works mechanically but lacks formal sterility validation in the literature.
- Sterile surface preparation deserves far more detail than this video provides.
- Frequency of injections should be determined with a prescribing provider, not defaulted from online content.