Thanks Chris. What Dr. Sears says would appear to dovetail with what Jon Barron said - that a bowl of spinach our grandparents ate contained eight times the nutrition as the bowl of spinach we eat today. I like chlorella and spirulina a lot. The custom blend of superfoods powder I take contains both, along with several other items. It is modeled after a Dr. Schulze formula with added acerola cherry and is made with organic/wild-crafted ingredients by one of our good friends here at CZ.