I'm a 48 year homeschool mom & nana. I have Fibromyalgia which causes me to be fatigued often. Drinking coffee makes me crash within 45 minutes. G-Fuel gives me the added energy and brains boost that I need to get me thru the day!! I've tried almost all the flavors and there isn't a single one that I don't like. However, Black on Blackberry is my personal favorite!!