Michael Greger M.D. For some context, please check out my associated blog post The Best Foods: Test Your Nutrition Knowledge! <a href="http://www.facebook.com/timmeh.green">http://www.facebook.com/timmeh.green</a> Timothy Green Today I learned that RED leaf lettuce has the most antioxidants, IdaRED apples have the most amongst apples, and RED onions are the best amongst onions.