India, Sept. 19 -- The Pentagon has rolled out formal guidance for mandatory testosterone testing for male service members 30 and older, a policy that leaves out women for now and faces questions from medical experts about the need and efficacy of such a program.

Defence Secretary Pete Hegseth announced in July that a new program to screen troops for "testosterone deficiency" was necessary to allow them to operate at their "absolute best." The new clinical guidance, released late Thursday, outlines how the program would work.

The Pentagon's efforts to test for low testosterone coincide with growing interest in the hormone that has been driven by men's health influencers and podcasters, many of whom recommend the drug as a way to boost e...