How long should i wait to donate blood after smoking marijuana??

One week: One week will be more than enough. However, you should disclose your marijuana use to the doctor or nurse at the blood center. It is commendable that you want to donate blood and do your civic duty. For the sake of your own health, you should not use weed. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, 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.