One of the most common arguments against maintaining a vegetarian diet is the assumption that you must consume meat to keep a healthy level of protein and other nutrients more easily attainable through animal products. Many people who become a vegan or vegetarian without proper diet research can suffer from protein-energy malnutrition (PEM) or iron deficiency, along with too little zinc, calcium and vitamin B. This can lead to a feeling of weakness, lack of energy, as well as head and muscle aches. However, with a little research and planning, a vegetarian can keep to a more full and healthf...