Roger Clemens, a California-based public health expert and member of the 2010 Dietary Guidelines Advisory Committee, says that it’s definitely possible to get the protein needed for good health via a plant-based diet. “One can obtain adequate protein on a plant-based (pure vegan) diet,” says Clemens. “The key to this approach is to identify plant protein sources that are complementary, such as grains and legumes. This approach provides the consumer with all of the essential amino acids consistent with reference intake recommendations provided by the Institute of Medicine.”