I turned 36 last October but had my first scope the month before. They found a 1cm polyp and I'm on a 5 year plan because my grandfather was diagnosed with colon cancer at 42. The prep was a 7oz bottle of magnesium citrate and a bottle of Miralax mixed with 32oz of Gatorade. It wasn't bad because I drink that much liquid in a few hours anyway. The gas pains after the procedure were the only real discomfort. Mainly because my wife wanted to go shopping for hours afterwards.