This document defines different types of vegetarians such as lacto-vegetarians, ovo-vegetarians, and vegans. It notes that reasons for becoming vegetarian can include religion, lifestyle choices, or ethics. Demographics of vegetarians are also mentioned, such as percentages of populations that are vegetarian broken down by gender and age. The document discusses one company, Graze, that focuses on healthy vegetarian and vegan foods that can be delivered. It also notes that besides meat, there are other surprising items vegetarians need to avoid when eating and drinking.