>Dong, an expert in vitamin D and a professor in the MCG Department of Population Health Sciences, says about 15 minutes daily in the "young" sun -- between 10

>Dong, an expert in vitamin D and a professor in the MCG Department of Population Health Sciences, says about 15 minutes daily in the "young" sun -- between 10 a.m. and 2 p.m. -- but before your skin starts to get pink, is the best source of vitamin D. That's what works best for me! Mood and mobility improve!