Can you actually 'optimize' testosterone levels by summer?

What did @maximebrunet_ actually say?

The creator listed three signs he says indicate your testosterone is "not where it should be": waking up feeling lethargic, being "scared to take risk" (like starting a business or going to the gym), and having irregular or loose bowel movements in the morning. His fix? "Fix your fucking diet right now, you're not eating enough natural foods." He also acknowledged "other health complications" might be involved, which is the most accurate thing he said in the whole video.

To be fair, this wasn't framed as a medical diagnosis. He's talking to young men about self-improvement. But he hung these three symptoms on testosterone as the likely culprit, and that framing deserves scrutiny because it's misleading in ways that could actually delay someone from getting real help.

Does the science back this up?

Partially, but the connections are much weaker and more complicated than the video implies. Fatigue is a recognized symptom of hypogonadism, but it's also a symptom of roughly 200 other conditions. Risk aversion has no established link to testosterone levels in clinical literature. The bowel habit claim is the most questionable of the three.

On fatigue: yes, clinically low testosterone (hypogonadism is typically defined as total testosterone below 300 ng/dL per the American Urological Association) does cause fatigue. But Bhasin et al. (2010, New England Journal of Medicine) found that testosterone treatment in men with low levels improved energy modestly at best, and placebo effects were significant. Fatigue alone is nowhere near a reliable indicator.

On risk-taking behavior: testosterone has been studied in relation to financial risk-taking. Apicella et al. (2008, Evolution and Human Behavior) found a modest positive correlation between testosterone and risk tolerance in some populations. But this is a far cry from saying fear of posting on social media means your testosterone is low. That's a motivational coaching claim dressed up in endocrinology clothing.

On bowel habits: there is essentially no credible clinical evidence that testosterone levels predict or cause morning bowel irregularity in healthy young men. Some research exists on testosterone's role in gut motility in women with irritable bowel syndrome, but applying that here is a stretch.

What did they get wrong (or right)?

He got the fatigue piece directionally right, but overstated it badly. Fatigue is a symptom of low testosterone, but it is far from specific to it. Attributing it to diet first ("you're not eating enough natural foods") is not unreasonable, since poor nutrition absolutely affects energy and hormonal health. Calder (2013, Proceedings of the Nutrition Society) documented how micronutrient deficiencies, particularly zinc and vitamin D, correlate with lower testosterone levels.

He got risk aversion wrong. There is no clinical basis for claiming that reluctance to start a business or talk to someone reflects low testosterone. Conflating motivational stagnation with hormone deficiency is a common trope in male wellness content, and it's not supported.

He got the bowel habit claim wrong. This reads more like bro-science mythology than anything with a physiological basis in the testosterone literature. It may reflect gut health issues, anxiety, or diet, none of which are testosterone problems by default.

Credit where it's due: he told people not to stay in their current state and to "fix them now," and he didn't push a product or supplement in this clip. That's a lower bar, but it matters.

What should you actually know?

If you genuinely suspect low testosterone, the only way to know is a blood test. Symptoms like persistent fatigue, reduced libido, difficulty maintaining muscle mass, and mood changes can indicate hypogonadism, but they can also indicate thyroid disorders, sleep apnea, depression, anemia, or poor sleep hygiene. Buvat et al. (2013, Journal of Sexual Medicine) noted that symptom-based screening for hypogonadism has poor specificity, meaning most men with these symptoms don't have clinically low testosterone.

A proper workup includes total testosterone (measured in the morning, since levels peak then), free testosterone, LH, FSH, and sometimes prolactin. One low reading isn't enough. The Endocrine Society guidelines recommend two separate morning measurements before any diagnosis.

Diet does matter. Zinc deficiency, obesity, chronic caloric restriction, and excessive alcohol consumption are all documented contributors to lower testosterone. Eating better is not bad advice. It's just not the whole story, and it's not a substitute for an actual clinical evaluation if symptoms are persistent.

• Don't self-diagnose low testosterone from a TikTok symptom list.
• Fatigue is a real symptom of hypogonadism, but it's also a symptom of dozens of other conditions.
• Risk aversion and bowel habits are not recognized clinical markers of low testosterone.
• A morning blood draw measuring total and free testosterone is the starting point for any real evaluation.
• Diet and sleep quality genuinely affect hormone levels and are worth addressing first.