TikTok TRT injection advice: what @sponlinecoaching got right

What did @sponlinecoaching actually say?

The creator claims subcutaneous (subQ) injection is the best route for TRT because it produces "the most stable levels," and recommends cycling through four fat-rich sites: both glutes while seated, and the love handle area on each side. He explicitly separates this advice from performance-cycle use, framing it as TRT-specific guidance.

To his credit, he is talking about rotating sites to prevent oil buildup and localized soreness, which is legitimate harm-reduction thinking. He is not prescribing doses, not naming compounds beyond the video caption's mention of testosterone cypionate, and not claiming any disease is cured. The advice is practical and personal. The problem is that some of it is oversimplified, and the core claim about stability deserves harder scrutiny than it gets here.

Does the science back this up?

The stability claim is the most interesting one, and the data are genuinely mixed. SubQ injection of testosterone cypionate does appear to produce a flatter pharmacokinetic curve compared to intramuscular (IM) in some research, but "more stable" is not a settled conclusion.

A 2017 study by Spratt et al. in the Journal of the Endocrine Society found that subQ testosterone cypionate produced comparable trough and peak levels to IM in a small cohort, with some subjects showing a flatter curve. A 2021 study by Kaminetsky et al. in Research and Reports in Urology also supported subQ as a viable route, showing sustained serum levels with weekly dosing. However, both studies involved structured clinical dosing, not informal site-cycling, and sample sizes were small. The honest answer is that subQ may smooth out peaks for some men, but it is not universally superior, and absorption varies significantly based on injection depth, body composition, and individual subcutaneous tissue thickness.

Glute fat as a preferred subQ site is not well-documented in clinical literature. Most subQ injection protocols reference the abdomen or lateral thigh, not the seated glute pinch the creator describes.

What did they get wrong (or right)?

Right: site rotation is genuinely good practice. Oil-based testosterone esters can accumulate and cause nodules, granulomas, or soreness with repeated injection into the same spot. Rotating four sites is textbook harm reduction, and most clinical injection guides recommend exactly this.

Questionable: the seated glute pinch technique he describes is not a standard subQ site in clinical or pharmaceutical guidance. The glute has variable subcutaneous depth depending on body composition. Done wrong, a needle aimed at glute fat while seated could easily hit muscle, which would make it an unintentional IM injection. That is not dangerous, but it undermines the whole point of his argument about stable subQ levels.

Wrong by omission: he never mentions needle gauge or length, which actually matter significantly for true subQ delivery. A 1-inch needle in a lean person will hit muscle. A 5/8-inch or 1/2-inch needle at a 45-degree angle is typically recommended for subQ. Leaving that out of a how-to video is a real gap.

What should you actually know?

If you are on TRT and considering subQ injections, the evidence suggests it is a legitimate and reasonably well-tolerated route for testosterone cypionate and enanthate. It is not fringe or bro-science. Several clinics now offer subQ as the default protocol, particularly for patients who inject frequently.

That said, "more stable levels" depends on your injection frequency, the ester you are using, your body composition, and your individual pharmacokinetics. A man with very low body fat may not have enough subcutaneous tissue at the glute or love handle to reliably deliver subQ. A man with high body fat may find subQ absorption is slower and less predictable.

Standard subQ sites supported by clinical guidance include the abdomen (at least two inches from the navel) and the lateral thigh. The love handle area is less commonly cited but not unreasonable if tissue depth is adequate. The seated glute pinch is idiosyncratic and not well-supported by injection technique literature.

Any change in injection route or site should be discussed with the prescribing provider. This video, while well-intentioned, is one man's personal protocol, not clinical instruction.