Do bodybuilders actually have low testosterone? Fact-check

What did @nursedoza actually say?

The core claim is this: "the guys with the biggest muscles have the lowest testosterone." The creator, who identifies as a nurse, argues that visibly muscular men are often on exogenous testosterone, steroids, or peptides, and that their natural testosterone is actually low. They back this up by claiming to have tested their patients' labs. They also state that lifestyle factors like phone-in-pocket EMF exposure reduce testosterone, and that their own total testosterone runs between 1,000 and 1,200 ng/dL through diet, sleep, sauna, and fasting alone.

Credit where it's due: the creator explicitly says natural muscle building is possible, discourages testosterone injections for themselves personally, and correctly notes that testosterone use can suppress endogenous production. But several other claims in the video are either unsupported, misleading, or presented with far more certainty than the evidence allows.

Does the science back this up?

Partially, but the framing distorts a real finding. It is true that anabolic steroid and exogenous testosterone use suppresses the hypothalamic-pituitary-gonadal (HPG) axis, causing testicular atrophy and low endogenous testosterone. That part is well-documented. But that's a very different claim from saying big muscles signal low testosterone.

The claim that testosterone is "very low in men at the age of 30 and above" as a blanket statement overstates the data. Testosterone does decline with age, roughly 1-2% per year after 30 (Harman et al., 2001, Journal of Clinical Endocrinology and Metabolism), but population-level hypogonadism is not the norm. Estimates of true clinical hypogonadism sit around 2-6% in men under 40 (Mulligan et al., 2006, International Journal of Clinical Practice). The claim that cell phones in pockets lower testosterone is based on weak, conflicting animal and observational data, not clinical trials. A 2021 review in Reproductive Biology and Endocrinology found insufficient evidence to draw firm conclusions about EMF and testosterone in humans.

What did they get wrong (or right)?

The right call: the creator accurately describes how exogenous testosterone suppresses natural production. Men who cycle off steroids often have low endogenous testosterone, sometimes for months. That is established physiology, supported by Coward et al. (2013, Journal of Urology), which found that men who had used anabolic steroids had significantly lower testosterone and sperm counts than non-users.

The wrong call: the title claim, "the guys with the biggest muscles have the lowest testosterone," is a sweeping generalization. Muscle mass and testosterone have a bidirectional positive relationship in natural athletes. Higher resistance training volume is associated with higher testosterone in drug-free men (Vingren et al., 2010, Sports Medicine). The creator is conflating drug-enhanced bodybuilders with all muscular men, which misleads viewers into thinking visible muscle is a red flag for low T.

The claim about their personal testosterone of 1,000 to 1,200 ng/dL from lifestyle alone is unverifiable here, and presenting it as a reproducible benchmark for viewers is irresponsible without clinical context. That range sits at the upper limit of normal and is not a realistic target for most men.

What should you actually know?

If you're a man concerned about testosterone, the relevant questions are clinical, not cosmetic. Symptoms of hypogonadism include low libido, fatigue, erectile dysfunction, reduced bone density, and mood changes. Muscle size is not a reliable indicator of testosterone status in either direction.

Lab testing matters, but so does interpretation. A single fasting morning total testosterone below 300 ng/dL, confirmed on two separate tests, is generally the clinical threshold for hypogonadism (Bhasin et al., 2018, Journal of Clinical Endocrinology and Metabolism). Free testosterone and SHBG levels add important context that a total T number alone can miss.

Lifestyle changes like sleep optimization, resistance training, reducing alcohol, and maintaining a healthy weight do have evidence behind them for modestly improving testosterone. But they are unlikely to move someone from 400 ng/dL to 1,200 ng/dL. If symptoms are affecting your quality of life, a licensed clinician should evaluate your full hormonal panel, not a TikTok video.

The bottom line on this video

The creator gets credit for discouraging unnecessary TRT and for acknowledging that drug-enhanced physiques are common in gyms. But the headline claim is misleading, the EMF-testosterone link is not established, and generalizing from a self-selected patient population to all muscular men is not how evidence works. Watch this with skepticism.