What did @thegymauthority actually say?
The creator laid out a rough scale for testosterone levels: normal range of "200 to 850 nanograms per deciliter," with levels over 1,000 being "a bit suspicious," over 1,200 "very suspicious," and over 1,500 "basically impossible without steroid use." They then noted pro bodybuilders sometimes exceed 5,000, and some reportedly go above 10,000. The video ends with a reveal that one person in their group hit 928 ng/dL, which they frame as the outlier.
To their credit, the creator is transparent about their data and doesn't make any treatment claims. They're describing observed patterns, not prescribing anything. That context matters when evaluating how accurate their thresholds actually are.
Does the science back this up?
Mostly, yes, but the floor of the normal range is off, and the ceiling is more nuanced than a hard cutoff suggests. The commonly cited clinical reference range from the Endocrine Society and most major labs is roughly 300 to 1,000 ng/dL for adult men, not 200 to 850.
A 200 ng/dL floor is below the clinical threshold for hypogonadism in most guidelines. The American Urological Association defines low testosterone as below 300 ng/dL, and the Endocrine Society's 2018 clinical practice guidelines (Bhasin et al., Journal of Clinical Endocrinology and Metabolism) place the lower bound at 264 to 300 ng/dL depending on assay. So calling 200 the bottom of normal is a stretch.
The upper end is trickier. Levels above 1,000 ng/dL are unusual in untreated men but not impossible. A large cross-sectional analysis by Travison et al. (2017, JCEM) found that values above 1,000 in untreated men are rare but do occur, particularly in younger men with high SHBG or in men with certain genetic variants. "Basically impossible" at 1,500 is a reasonable population-level heuristic, but it's not a hard biological wall.
What did they get wrong (or right)?
The 200 ng/dL floor is the clearest factual error here. That number is low enough to represent clinical hypogonadism in most diagnostic frameworks, not the bottom of healthy range.
The 1,500 ng/dL claim as "basically impossible without steroid use" is directionally correct but overstated. It would be more accurate to say levels above 1,500 are extremely rare in untreated men and warrant clinical investigation, not that they're categorically impossible. Rare edge cases exist.
The creator gets credit for the 850 to 1,000 range being a reasonable practical upper normal, which aligns with what most clinical labs report. They also get credit for being transparent about their sample data, showing the actual distribution rather than just making claims. The 928 ng/dL outlier they mention is genuinely borderline and worth flagging, as it sits above most reference ranges but below any threshold that would automatically suggest exogenous use.
What should you actually know?
If you're trying to interpret your own testosterone lab results, the reference range printed on your lab report matters more than any number you hear in a fitness video. Labs calibrate their ranges to their specific assays, and results from different testing methods are not always directly comparable.
Total testosterone is also only part of the picture. Free testosterone, SHBG levels, LH, and FSH all contribute to a complete clinical assessment. A total testosterone of 928 ng/dL in one person might represent something very different than the same number in another, depending on their SHBG levels and symptoms.
The claim that pro bodybuilders reach 5,000 to 10,000 ng/dL is plausible based on what's reported in the harm-reduction and sports medicine literature. Rahnema et al. (2014, Fertility and Sterility) documented cases of exogenous androgen use producing values well above physiological range, though exact numbers in competitive bodybuilding are hard to verify through controlled studies for obvious reasons.
If your levels come back above 1,000 ng/dL without any exogenous testosterone use, talk to an endocrinologist or a qualified telehealth provider. Don't self-interpret based on TikTok benchmarks.