which vitamins are generally lacking in a protein-rich diet?
B12 and iron are plentiful in vegetarian-based high-protein diets by lacking in meat-based diets. B. Vitamin C and folate are missing in both vegetarian and meat-based high-protein diets. C. Vitamins A, C, and B12 are in short supply for all high-protein diets. D. Legumes are excellent sources of all B vitamins but lacking in iron, vitamin C, and vitamin A.