Types of vegetarians
Pure-vegetarians or vegans
They eat: vegetables fruits grain legumes oil
Avoid all products that are derived from an animal, even honey and refined sugar. Some have non-consumption of animal products to their clothing
Lacto-vegetarian
They eat: vegetables fruits grain legumes oil and milk derivatives
Avoid: meat, eggs and sausages, while consuming honey and refined sugar. Milk is their main source of protein
Ovo-lacto vegetarian
They eat: vegetables fruits grain legumes oil eggs milk and dairy products
Avoid: meat of all kinds and their main source of protein is egg

[...] Pure sugar too much can be dangerous because it disrupts the delicate regulatory mechanisms to store and to burn simple sugars. [...]