I take flax oil, d3, cinnamon, multi vitamin, quecertin/c, e. can i safely take something else to protect against illness?

Possibly: The supplements you mention are ok, but nothing really prevents illness like a good diet and exercise regimen. Also getting a good night's sleep every night to keep stress at a minimum also helps. Would recommend a b-complex and calcium in addition to the above, but check your vitamin d level periodically with your doctor to make sure you don't have too much.

Diet and exercise: The stuff you are taking is okay but will not improve your health. Have a healthy diet, exercise, drink plenty of water, have safe sex, . Wish you good health! For info on Nutrition: http://www.choosemyplate.gov/.