Experts caution against universal testosterone screening due to natural variability in hormone levels influenced by age, time of day, obesity, illness, stress, sleep, trauma, and medications. Clinically significant low testosterone, or male hypogonadism, affects at most 1% of men and is typically linked to genetic or pituitary issues, warranting symptom-based evaluation rather than blanket testing. The military’s new universal screen uses a threshold of less than 300 ng/dL, aligned with AUA guidelines.
Based on survey data showing a weighted mean morning total testosterone of 405 ng/dL among Army members, researchers estimate that about 26% of active-duty Army personnel would test below this cutoff. Using the CDC’s lower harmonized reference of 264 ng/dL, the estimate drops to 15%. The likelihood of low results increases with age and BMI, with 19.5% of men under 30 and 33% of those aged 30 and older showing low levels.
Critics warn such screening risks false alarms and unnecessary interventions given the low prevalence of true hypogonadism.
Source: Ars Technica · Summarized by HeadlinesBriefing