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.
UVA radiation has no positive effect on your body.
Out of the two kinds of radiation, uvb is the one that helps you synthesize vitamin d. It doesn't say whether or not uva radiation has any possible benefits for a person. It might or might not. I think this confused the system because it can't guess at information it isn't given.
( z1 affect :polarity - :ARG0 ( z2 thing :ARG1-of ( z3 radiate :ARG0 ( z4 thing :name ( z5 name :op "UVA" ) ) ) ) :ARG1 ( z6 body :poss ( z7 you ) ) :mod ( z8 positive ) )