Sebastian Oe, 12 of Greenwich, came in first place in the kids' 1-mile run during the "Cook Your Buns" race June 11 at Greenwich Point. After Sebastian fractured his arm twice in the same place in skateboarding and snowboarding falls last year, a doctor found low levels of vitamin D in his blood, a contributing factor to the breaks. Local doctors and nutritionists are seeing many people, both children and adults, deficient in a vitamin that, aside from creating stronger bones, may be associated with reduced risks of some cancers and other ailments. Photo: File Photo / Greenwich Time File Photo