Final answer:
Vegetarians may lack proteins and essential nutrients like vitamin B12 and calcium in their diet.
Explanation:
Proteins may be lacking in the diet of those who practice vegetarianism, especially if they obtain proteins solely from plants. Nutrients such as vitamin B12, calcium, omega-3 fatty acids, and choline should be consumed adequately. Iron and zinc, particularly for female athletes, could also be of concern.
Learn more about vegetarianism and nutrient adequacy here:
https://brainly.com/question/30040387
