At 280 pounds I will never be an elite marathoner but I sure love trying! Last year was my first 1/2 marathon and it was brutal. I was using GU and my guts hated it. Found e-Gel on the web by a fluke, thought I would try it. WOW, what a rush! Running is fun, did another 1/2 marathon and shaved 6 minutes off my time. I might even be your ‘biggest’ customer.