Overview
Sugar is a sweetening product that comes from the sugarcane plant, native to New Guinea. It is probably the most common sweetener for most people, and it is used a lot for tea. People make sugarcubes out of them to make it easier to measure how much to put in the tea. Nowadays though, people want to find substitutes for it that are more healthy. Common substitutes are stevia, high fructose corn syrup (not healthy at all), monk fruit, and palm sugar.
Safety notes
Don't have too much. Really.
Not medical advice — community-written information. Check a professional for anything health-related.