A new study suggests that vitamin D deficiency could limit mobility in older adults said senior author Sue Shapses a professor in the Department of Nutritional Sciences at the School of Environmental and Biological Sciences at Rutgers University-New Brunswick. The findings of the study were published in - The American Journal of Clinical Nutrition. Researchers said that older adults take 800 international units (IU) equivalent to 20 micrograms of vitamin D daily to prevent deficiency. Vitamin D is important for bone health and people get it through some foods exposure to the sun and vitamin pills. An important next step