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SAN DIEGO (March 31, 2026) Karen Kelly, a research physiologist and principal investigator with Naval Health Research Center (NHRC), collects blood samples from U.S. Marine recruits stationed in San Diego. Researchers used minimally invasive finger-prick tests to collect blood samples and document the vitamin D levels of recruits. This study is an on-going effort to reduce the number of service members with vitamin D deficiencies, across all branches of service. NHRC, part of Navy Medicine Research & Development, supports Navy, Marine Corps and joint U.S. warfighter health readiness and lethality with research and development that delivers high-value, high-impact solutions to the health and readiness challenges U.S. military population faces on the battlefield, at-sea, home and abroad. (U.S. Navy photo by Danielle Cazarez/released)
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