Doctors and physicians’ groups specializing in men’s health are highly skeptical of War Secretary Pete Hegseth’s proposal to test all military service members for low testosterone, saying it could ultimately be damaging for their health.

Hegseth announced a new proposal to create a “High-T” military force by screening service members over age 30 for low testosterone, the hormone in males that is responsible for muscle growth, bone density, sex drive, and mood stabilization.