I am 37 yrs. Old vegetarian married guy. I manage my lifestyle by taking nutrient diets, doing exercises, taking proper sleep and no alcohol and smoking. I have to learn & complete many tasks like learning new technical courses, designing websites and writing web blogs. In all such cases, I feel mentally incapable. Whatever I read and learn, I forget quickly. I noticed that I am still able recall some of lessons that I learned during school time but currently I am unable keep new lesson and topic in my mind. Even I try to repeat new topic but still I am facing this issue. Also I feel headache during learning new topics. Can this issue be resolved? Please guide me and suggest me some supplements.