The Trump administration is focusing new attention on testosterone deficiency among American men, with military officials implementing screening guidelines as senior health officials warn that poor health among younger Americans is shrinking the pool of people physically qualified to serve.
Adm. Brian Christine, a senior Department of Health and Human Services official, said declining testosterone levels should be examined alongside obesity, chronic disease and other health problems that can affect military recruitment and readiness.
“There is absolutely national defense readiness ramifications for [low testosterone],” Adm. Brian Christine, a senior Department of Health and Human Services official, told Fox News Digital.
Christine helped shape an initiative that resulted in the Pentagon issuing clinical guidelines in September for identifying and treating testosterone deficiency among male service members.
Under the guidelines, male service members age 30 and older undergo screening for testosterone deficiency as part of periodic health assessments, upon entering military service or during annual physical examinations.
The initial screening involves an assessment of symptoms and risk factors, with blood testing used when medically indicated, while service members younger than 30 can request screening or receive it when clinicians identify potential warning signs.
Military medical guidelines call for testosterone measurements on two separate mornings when testing is warranted, an approach intended to reduce the possibility that normal fluctuations in hormone levels produce an inaccurate diagnosis.
Service members diagnosed with testosterone deficiency can discuss treatment options with military physicians, including testosterone replacement therapy, but treatment is voluntary and is not intended as a performance-enhancing program.
War Secretary Pete Hegseth has described the initiative as part of a broader effort to improve the health and physical performance of American troops, arguing that the individual service member remains the military’s most important battlefield asset.
“This initiative … is not about artificial enhancement,” Hegseth said when outlining the policy, describing its purpose as restoring normal biological function and protecting long-term health.
The policy arrives amid broader concerns about the health of military-age Americans, with Christine saying approximately 77% of Americans between 17 and 24 cannot qualify for military service without receiving a waiver.
More than 70% of young men are ineligible under current standards, according to Christine, while only about 3% of young Americans express an interest in serving.
Obesity, chronic medical conditions, drug use and other physical or behavioral factors contribute to military ineligibility, creating a recruiting challenge that extends well beyond testosterone levels alone.
Christine has also pointed to estimates suggesting average testosterone levels among American men have declined considerably over several decades, although researchers continue debating the magnitude of the decline and the factors responsible for it.
Obesity and chronic disease are established factors associated with lower testosterone, while potential environmental influences such as endocrine-disrupting chemicals and microplastics remain subjects of ongoing research.
A recent study involving active-duty Army personnel added to the discussion after researchers found that roughly one-quarter of the men tested had at least one testosterone measurement below 300 nanograms per deciliter, a commonly used clinical threshold.
Researchers cautioned that a single low measurement does not by itself establish testosterone deficiency because a proper diagnosis also requires relevant symptoms and repeat testing.
The administration’s approach has nevertheless generated pushback from some medical organizations that question whether broad screening of otherwise healthy men is supported by sufficient scientific evidence.
The Endocrine Society and American Association of Clinical Endocrinology have raised concerns that widespread testing could result in overdiagnosis and unnecessary treatment.
Testosterone therapy can provide benefits for appropriately diagnosed patients, but medical experts warn that improper treatment can cause side effects, including reduced sperm production and potential fertility problems.
The Pentagon’s own guidance acknowledges those risks and advises service members who want children to discuss fertility with their physicians before beginning testosterone therapy.
Officials have also stressed that testosterone levels can be temporarily affected by sleep deprivation, intense training, calorie restriction, illness and battlefield stress, all of which are particularly relevant in military populations.
The War Department is separately developing hormonal-health guidance for female service members, although the current testosterone-deficiency guidelines specifically address male personnel.
