The new guidelines are to start at 45 and every 5 years after that. They are finding pre-cancerous polyps in younger people these days and want to start prevention earlier- and the gastroenterologists want to take and extra vacation each year....

I recommend it to everyone I know. Painless for the most part and the prep is a relatively minor inconvenience compared to the alternative.

Never underestimate your ability to overestimate your ability.