I ate an egg on 1/2 an English muffin 2 hrs before a blood test (didn't know before). My dr knows, says it's ok, but how can it affect CBC results?

Does not. Eating what you did, does not affect CBC results. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.