Democratic senators want answers about Hegseth's military testosterone plan

The senators raised questions about its scientific basis, cost and consequences.

Senate Democrats are pressing Defense Secretary Pete Hegseth for answers about his directive requiring the military to measure troops' testosterone levels , seeking details on how the policy will be carried out amid concerns over how it will apply to women and whether it could inadvertently encourage service members to self-medicate with potentially dangerous supplements.

In a letter to Hegseth, Sens. Richard Blumenthal of Connecticut, Mazie Hirono of Hawaii, Gary Peters of Michigan, Elizabeth Warren of Massachusetts and Ruben Gallego of Arizona said the Pentagon has provided little explanation for the new requirement, raising questions about its scientific basis, cost and potential consequences.

"The Department has provided no evidence that this sweeping new policy will improve force readiness or health, nor has it explained the scientific basis, costs, or risks associated with implementing it across the force," the senators wrote.

Last week, Hegseth directed the military to begin screening testosterone levels for all service members, including women, age 30 and older as part of their annual physical health assessments, expanding routine exams that have traditionally focused on baseline health measures such as vision, hearing and other standard medical screenings. Troops under 30 may opt into testing voluntarily, and any recommendation for testosterone replacement therapy, or TRT, would also be voluntary for all ages.

The policy has yet to be formally implemented, thus the specifics have not yet been figured out and it remains unclear when service members will begin undergoing testosterone screenings as part of their annual health assessments, though Hegseth directed a plan be ironed out by Aug. 15.

The cost is also unknown and the Defense Department could require additional medical personnel to be hired for the screenings at routine annual exams.

The move comes as a broader focus on fitness has been core to Hegseth's tenure -- an unusual move for a role traditionally focused on large operations and the macro workings for the Pentagon -- which includes regular videos from the Pentagon of Hegseth working out with troops.

Hegseth has directed the services to adjust their fitness tests and reassess body-fat standards, including new measurement methods introduced earlier this month. The Army has also begun integrating gender-neutral fitness requirements for soldiers serving in ground combat roles.

Among the unresolved questions are whether service members could face administrative consequences if their testosterone levels fall below a threshold the Pentagon has yet to define and how the policy will apply to women.

"Coupled with the Department's recent repeated efforts to redefine military culture around an exaggerated conception of masculinity, this initiative risks undermining years of work to ensure that women servicemembers are evaluated and valued based solely on their ability to perform the mission," the senators wrote.

Some welcomed the expanded access to testosterone screening and treatment, arguing that obtaining testosterone replacement therapy through Tricare, the military's health insurance program, can be cumbersome. But others warned the policy could create unintended incentives for troops to use unregulated supplements or anabolic steroids to avoid being flagged for potential health issues, while raising concerns about embarrassment for those found to have low testosterone.

"I think this is a great idea on paper, but we need to be careful about how it's implemented," said one official who works in fitness coaching and spoke on the condition of anonymity because they were not authorized to speak to the media.

Low testosterone has long been a concern in some parts of the military, particularly within the special operations community, where prolonged stress, intense physical demands and inadequate caloric intake are believed to contribute to lower hormone levels, though there's little detailed research on the subject.

At the same time, testosterone replacement therapy, or TRT, has surged in popularity across podcasts, social media and the broader wellness industry, where it is often promoted as a way to boost energy, muscle mass and overall vitality. Medical experts caution, however, that clinically low testosterone is relatively uncommon.

Testosterone deficiency affects roughly 2% of men, according to the American Urological Association, and physicians have warned that the growing popularity of TRT has created the misleading impression that the condition is far more widespread than medical evidence suggests.

Moreover, factors such as insufficient sleep and poor nutrition can contribute to lower testosterone levels, studies show , two issues the military has long struggled to address.

Nutrition, in particular, has been a persistent challenge across the services, with troops often reporting inconsistent access to high-quality, protein-rich meals. Military dining facilities have faced criticism for menus heavy on fried foods and carbohydrates, sugar, limited portions and operating hours that do not always align with the schedules of service members working long or irregular shifts.

"It's a readiness, retention, recruiting and long-term health issue," Rob Evans, an Army veteran whose app Hots & Cots collects reviews from service members on housing and food on military bases, told ABC News about issues with nutrition on military facilities.

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