Male Testosterone Levels Plummet by Over 50% in Five Decades, Scientists Warn

The Guardian Health · 2026-07-07
Male Testosterone Levels Plummet by Over 50% in Five Decades, Scientists Warn

New research indicates a concerning trend in male health, with average testosterone levels plummeting by over half in recent decades. Data presented by scientists at the annual meeting of the European Society of Human Reproduction and Embryology in London revealed a 54% drop in total testosterone levels among men between 1972 and 2019. This significant decline has prompted researchers to issue a stark warning, labeling the situation a 'major crisis in male reproductive health' and a looming 'male fertility crisis' for society. The experts suggest that factors such as rising rates of obesity and diabetes are contributing drivers to this alarming phenomenon. Such a profound shift in male physiology carries considerable implications for public health, suggesting broader environmental or lifestyle impacts that warrant immediate attention. This alarming data, as reported by The Guardian Health, underscores the urgency for deeper understanding and potential interventions regarding male hormonal health.