Gothenburg, Sweden – A new doctoral thesis from the University of Gothenburg suggests that the link between testosterone and men’s overall well-being is far weaker than commonly believed. While the hormone does play a role in certain health aspects, higher testosterone levels are not necessarily the key to improved quality of life.

Interest in testosterone has surged in recent decades, with many men seeking treatment for fatigue or depression under the assumption that low hormone levels are to blame. However, researchers caution that this view oversimplifies the hormone’s role.

The study analyzed large-scale data from the United States and Sweden, focusing on muscular health, internal body processes, and specific symptoms in men. According to physician and researcher Amar Osmancevic, the clearest associations were found in sexual health issues such as reduced desire, erectile difficulties, and performance problems. Even then, the connections were weaker than expected compared to men with normal testosterone levels.

Muscle Health and Inflammation

The research confirmed that testosterone influences muscle composition, particularly by reducing intramuscular fat around the stomach, waist, lower back, hips, and chest. Yet muscle quality was also linked to other factors, including estradiol — a form of estrogen — and proteins that transport sex hormones in the blood.

Low testosterone levels were consistently associated with higher levels of chronic inflammation, which can affect long-term health regardless of age or body size. Osmancevic emphasized that managing overall health and reducing inflammation may be just as important as focusing on testosterone levels.

Fatigue and Depression: Other Drivers

Contrary to popular belief, the study found no strong link between testosterone deficiency and symptoms such as fatigue or depression. Instead, age, lifestyle, coexisting health conditions, and abdominal fat were identified as stronger predictors of these issues.

“You shouldn’t focus too narrowly on nonspecific symptoms or a test result,” Osmancevic concluded. “Abdominal fat and age seem to be stronger drivers of future symptoms than the individual’s baseline testosterone level.”

This research adds nuance to the ongoing debate about testosterone therapy, urging caution against viewing the hormone as a catch-all solution for men’s health concerns.