Can vit D, omega-3 fatty acids prevent autoimmune dx development, even in non-deficient people? (some plausibility, no other meds can) vit D *might* have an effect, esp post-2y cautious interest seems okay! extension worth looking at VITAL trial add-on #ACR21 ABST0957 @RheumNow https://t.co/H5aF8Vl79u