 [ Symptoms ] can low levels of vitamin d lead to diabetes [ Disease ] the vitamin d issue is rather complex large observational studies indicate that folks with low vitamin d levels are at greater risk for type 2 diabetes osteoporosis and a whole host of medical problems it is very difficult to know whether this is due to a true cause and effect relationship low vitamin d helping to cause type 2 diabetes or whether this association is due to confounding factors such that low vitamin d levels are just an indicator of poor health status or suboptimal lifestyle habits  so far i have not been recommending vitamin d for people who have normal levels and i have supported supplementation or sunshine for people with low levels