If you have the flu already take 1000 units of D-3 per pound of body weight all at once. The instructions are to repeat that the next day. 1 daughter and I both started when we had the flu and were really sick with it. We only took the megadose once each and symptoms were gone by evening for me and next morning for her.
Thank you for your information, arthurus.
I will test your recommendation the next time I get the flu seeing I cannot take the shot. I am a big beliver in Vit. D-3 but I have never heard of this before.