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Protein is not included as an element in the Guiding Stars algorithm for several reasons. Protein is not a focus of the authoritative scientific bodies nor is it included in any of their dietary recommendations (USDA Dietary Guidelines for Americans, MyPlate, etc.). The Dietary Guidelines for Americans do not include specific recommendations for protein. In the US, people generally over consume this macronutrient and protein deficiency is extremely rare. Additionally, protein is found in negligible or trace amounts in many foods (i.e. produce, sweets). Thus it makes more sense to consider protein as a component of the total diet, rather than as a percentage of individual foods. Finally, there is no long term data on the safety and health effects of increased protein intake as recommended by many recent fad diets.