A vegan diet is not an original diet. It's a basic way of living a life. As humans, we exploited animals for food, clothes, etc. And here's where this diet comes in. In this diet, you don't have to consume any foods and drinks which are obtained from animals either directly or indirectly. Examples of foods that you can't eat are Milk, Honey, Meat, etc. These all above foods are obtained from animals directly or indirectly