Re: speaking from personal experience
...astronauts get colonic prior to going into space - think I remember hearing that all sorts of stuff was uncovered - much of it way older than 7 years (albeit only traces) You would presume that the likes of NASA wouldn't avail of this kind of thing if it were of dubious worth
What crap.
No food sits in your system for years. This is typical psuedo-science. If your colon isn't functioning properly, you should see a proper doctor, not some random person with a garden hose and a few warm towels.
...astronauts get colonic prior to going into space - think I remember hearing that all sorts of stuff was uncovered - much of it way older than 7 years (albeit only traces) You would presume that the likes of NASA wouldn't avail of this kind of thing if it were of dubious worth