"Conversely, in the UVA1 therapy group, 25(OH)D serum levels decreased significantly from 21.9 to 19.0 ng/mL (P < .001). "
Were the patients told to avoid sunlight for the duration of the test? If so this may explain this slight decrease.
“One pill every two weeks fights diabetes, cancers, heart failure, and 18 other diseases.”
Were the patients told to avoid sunlight for the duration of the test? If so this may explain this slight decrease.