The document discusses micronutrient deficiency in elderly populations. It finds that 36-47% of community-dwelling elderly have low vitamin D levels, while nursing home residents have lower levels of several vitamins and minerals compared to independently living elderly. Hospitalized elderly also experience high rates of deficiencies like vitamin C deficiency. Supplementation with multiple micronutrients has not shown benefits for health outcomes in studies. Higher vitamin D intake and achieving serum levels over 30 ng/mL through supplementation is recommended due to benefits for muscle function, falls prevention, and fracture reduction in the elderly.