How to get vitamin d naturally<br>Learn how the sun creates vitamin d. Sunlight is a form of radiation that has two forms, ultraviolet a (uva) and ultraviolet b (uvb) radiation. Your main source of vitamin d occurs when uvb radiation strikes your skin. When this happens, the first steps of vitamin d synthesis in your body is triggered.
You can synthesize vitamin d on cloudy days.
( z1 possible :ARG1 ( z2 synthesize :ARG0 ( z3 you ) :ARG1 ( z4 small-molecule :name ( z5 name :op "vitamin" :op "d" ) ) :time ( z6 day :ARG1-of ( z7 cloudy ) ) ) )