There was once a difference in classification that a Dwarf was below 4' 10, but above 4'' a Midget being 3'- 4' at maturity. However, certainly in England the terms are seen as inter-changeable. Ironically I am good friends with a genetically short family.
Just an example. A sweet onion is about 7% sugar, in-which about 40% of that is Fructose. A white onion (or any non-sweet type) is about 5% sugar, in-which less than 40% is Fructose. The amount of Fructose you are getting from even a few ounces of onion is minute. This Fructose is also bound with the flesh (Fiber) and other forms of sugar (Sucrose and Glucose).
Onions are rich in sulphur, fibers, potassium, calcium, vitamin B, vitamin C and they are low in fat, cholesterol and sodium. Here is a detailed Onion Nutrition chart: It is an immediate cure for fever, common cold, cough, sore throat, allergies, etc. A mixture of onion juice and honey can cure these problems easily.