Dr Todd's Ozempic testosterone claim needs context

What does this Instagram post claim?

Dr Todd Schlifstein tells his 200,000 followers that "Ozempic raises testosterone levels" and cites "new research on the GLP ones" as evidence. He promises a "deeper dive" into how this works.

The post is light on specifics but suggests GLP-1 medications like semaglutide (Ozempic) directly boost testosterone. That's not quite accurate.

What does the research actually show?

The studies Dr Todd likely references found testosterone increases, but they're tied to weight loss, not direct hormonal effects. A 2023 study by Glintborg et al. in Diabetes Care tracked 30 men with type 2 diabetes on semaglutide for 20 weeks.

Total testosterone rose from 8.7 to 12.4 nmol/L (251 to 357 ng/dL). But here's the key: participants lost an average of 8.8% body weight. The testosterone boost correlated directly with fat loss, not semaglutide itself.

Another study (Clegg et al., Diabetes Obesity Metabolism, 2023) found similar results in 45 men over 68 weeks on semaglutide 2.4mg. Testosterone increased 23% on average, but again, participants lost substantial weight.

Why does weight loss raise testosterone?

This isn't mysterious. Excess body fat, especially visceral fat, converts testosterone to estrogen through an enzyme called aromatase. Lose the fat, reduce the conversion, and testosterone levels naturally recover.

Multiple studies confirm this pattern. Saad et al. (2017) showed that every 1-point BMI reduction correlates with roughly 40 ng/dL higher testosterone in obese men.

Dr Todd isn't wrong that GLP-1s can lead to higher testosterone. But presenting it as a direct drug effect rather than a weight loss benefit misses the mechanism entirely.

What's the clinical relevance here?

For men with obesity-related low testosterone, this could matter. If your levels are low because you're carrying extra weight, semaglutide might help normalize them through fat loss.

But if your low testosterone stems from primary hypogonadism or other causes unrelated to weight, don't expect semaglutide to fix it. The drug isn't a testosterone replacement.

The testosterone increases in studies, while statistically significant, often don't fully normalize levels in severely hypogonadal men. Some patients may still need dedicated hormone therapy alongside weight management.