Thanks, I'll check out the website. I had my adrenal gland checked out and it showed a decrease in function during the morning. I am on supplements for that. I think it may be causing a decrease in my immune system. My lungs just happen to be my weak spot due to previous damage. No one has ever told me to take vitamins although I do from time to time take them. I need to get back on them. I really appreciate your posting your thoughts.