I take GNC Ultra Mega Woman's vitamins, an extra 1000 Vitamin C and folic acid. I have to say this. Since I have been taking these and eating a yogurt at least 5 times a week and drinking orange juice every morning I have not been sick like I used to be. It seems to have let me go. I have not had a (knock on wood) sinus infection all winter. The first time in 12 to 14 years.