What is the quickest but healthy way to lose weight consitering that I am 21 and over 100 lbs overweight?

Diet, exercise, MD. Best to follow very controlled diet (high protein, moderate select carbs, low fat) with very consistent exercise program. Consult with md is important to monitor progress and approve the diet and exercise in larger volume loss patients. Surgery occasionally is recommended. Muscle building exercise is good as it increases caloric consumption as long as health & joints permit.
Control-IT. Control-it by biotics is a very good program that is very healthy and helps with weightloss and removing disease states.