Vitamin D is an essential steroid hormone that plays a role in calcium and phosphorus regulation and has the potential to affect sleep quality. Vitamin D deficiency in the elderly often occurs due to minimal exposure to sunlight and age-related physiological changes, which contribute to the high incidence of sleep disorders, including insomnia. This community service activity aims to screen vitamin D levels in the elderly as a cause of insomnia through the Plan-Do-Check-Act (PDCA) approach. The activity was carried out at Panti Bina Bhakti, South Tangerang, involving 93 elderly participants aged > 65 years. The results showed that the average vitamin D levels among the age groups 61-70 years, 71-80 years, 81-90 years, and 91-100 years were 7.6 mg/dl, 7.2 mg/dl, 7.6 mg/dl, and 13.9 mg/dl, respectively. Interventions through vitamin D supplementation, sunlight exposure, and education in the form of sleep hygiene are effective in improving the health and sleep quality of the elderly.

Sarcopenia is a progressive degenerative condition characterized by a decrease in muscle mass, strength, and musculoskeletal function, affecting the quality of life of the elderly. This activity aims to screen for vitamin D and educate the elderly about sarcopenia. Community service activities were carried out in nursing homes, involving education and screening of vitamin D levels. The results showed that the majority of respondents were women (79.6%) with an average age of 74.05 years. Most respondents experienced vitamin D deficiency, with 87.1% deficient, 3.2% adequate, and only 9.7% having good levels, with it being found that more women experienced vitamin D deficiency than men. Education regarding the importance of vitamin D and preventing sarcopenia is provided through outreach sessions and poster media. This activity emphasizes the importance of early detection and comprehensive intervention including physical exercise, proper nutritional intake, and lifestyle modification to prevent sarcopenia and improve the quality of life of the elderly. Community-based interventions are needed to address vitamin D deficiency and promote musculoskeletal health in the aging population.