Nowadays, vegetarianism is becoming more and more popular, but many people lack knowledge about nutrition, leading to improper vegetarianism or being a vegetarian all the time. This can weaken the body or increase the risk of disease.

The debate over vegetarianism has been going on for ages. Some people who follow a vegan diet report good health, while others report physical decline. As science advances, we are beginning to understand why people respond differently to diets that include little or no animal foods.