Plants do contain all the essential amino acids in adequate quantities to meet human needs, and even those of children (Millward). Vitamin D is not found in milk or meat, unless it is added during manufacturing. Sunlight is the proper source of this vitamin. Plants manufacture beta-carotene, the precursor of vitamin A. The original source of all minerals (including calcium and zinc) is the ground. Plants are abundant in minerals; and they act as the conduit of minerals to animals. The scientific truth is protein, essential amino acid, mineral, and vitamin (except for B12 which is synthesized by bacteria, not animals) deficiencies are never caused by a diet based on whole plant foods when calorie needs are met. Ms. Planck's distortion of nutritional science is a serious matter that needs to be fixed. Reference: Millward DJ. The nutritional value of plant-based diets in relation to human amino acid and protein requirements. Proc Nutr Soc. 1999 May;58(2):249-60.