hard to know either which way and one could burn lots of energy reading, pondering.
I just lay nude in the sun an hour a day from march thru november. December , january, february are vit. D famine months in my body. I guess mother nature, or god or whoever, made it that way. I get a flu in february almost always. I view it as a cleansing process, a positive thing. Its engineered in my system that I get a "flu", because I need one for reasons I don't understand, but I do know I always feel re-charged after a short flu.