Does high SHBG actually explain why TRT patients feel flat?

What did @alphaclubsupps actually say?

The creator's core argument is that SHBG acts like a "sponge" mopping up testosterone in the bloodstream, and that high SHBG can leave you feeling "tired, weak and generally fucked" even when total testosterone looks good on paper. He's right that free testosterone is the bioavailable fraction that matters clinically. He suggests frequent injections, lifestyle changes, and briefly mentions Anavar as a short-term SHBG suppressant, which is where things get medically dicey.

The Rachel Reeves joke aside, the basic physiology he's describing is real and often underdiscussed in TRT conversations that fixate only on total testosterone numbers. That part deserves credit. The Anavar mention, however, is a significant red flag that we'll get to.

Does the science back this up?

Yes, largely. SHBG's role in reducing free testosterone is well-established, and the clinical relevance of free versus total testosterone in symptomatic patients is genuinely debated in endocrinology.

A 2013 study by Rosner et al. in the Journal of Clinical Endocrinology and Metabolism confirmed that calculated free testosterone correlates more strongly with androgen-related outcomes than total testosterone in many patient populations. Separate research by Dunn et al. (1999, Clinical Endocrinology) validated the equilibrium dialysis method for measuring free testosterone and showed SHBG's binding affinity is high enough to meaningfully reduce bioavailable fractions when elevated.

On lifestyle and SHBG: insulin resistance, obesity, and low thyroid function are associated with lower SHBG, while caloric restriction, high alcohol intake, and aging tend to raise it. Winters et al. (2014, Journal of Clinical Endocrinology and Metabolism) documented this relationship across a large male cohort. So the creator's point about diet, sleep, and training having an indirect effect on SHBG is consistent with the evidence.

What did they get wrong (or right)?

They got the core biochemistry right. Where they went wrong is the Anavar recommendation. Oxandrolone (Anavar) is a Schedule III controlled anabolic steroid. Recommending it, even casually, as a compound to "punch down" SHBG in a short-term fix is not a lifestyle tweak. It is a clinical intervention with real risks, including liver toxicity, lipid dysregulation, and suppression of the hypothalamic-pituitary-gonadal axis.

Mentioning it the way you'd mention creatine or better sleep is irresponsible. A 2006 review by Coviello et al. in the Journal of Clinical Endocrinology and Metabolism noted that exogenous androgens including oxandrolone do suppress SHBG, but with meaningful cardiovascular and hepatic tradeoffs that require medical supervision. The creator did note it is "not a long-term solution," but that framing undersells the risks considerably.

He also conflates high estradiol (E2) as going "hand in hand" with high SHBG. This is a loose generalization. Estrogen actually increases SHBG production in the liver, so the relationship is real, but the direction and magnitude depend heavily on individual context. It is not a one-size-fits-all pairing.

What should you actually know?

If you are on TRT and feel symptomatic despite normal total testosterone, asking your provider to check free testosterone and SHBG is legitimate and clinically appropriate. This is not fringe thinking. Many endocrinologists and urologists now use free testosterone as the more clinically relevant marker, particularly in older men where SHBG tends to rise.

More frequent injections, smaller doses, are a real clinical strategy. Subcutaneous testosterone cypionate administered more frequently does blunt the peak-to-trough swing and may modestly influence SHBG over time, though the evidence here is still developing. A 2021 paper by Pastuszak et al. in Sexual Medicine Reviews noted that injection frequency affects hormone stability, though SHBG effects specifically need more robust trial data.

What you should not do is source Anavar or any other anabolic steroid off the back of a TikTok recommendation to manage SHBG. If SHBG is genuinely elevated and causing symptomatic low free testosterone despite TRT, a regulated provider can work through evidence-based adjustments without exposing you to the risks of unmonitored anabolic steroid use.