[thedoc (OP)]

Jon  asked the Naked Scientists:
   In the recent NS podcast, a guest discussed a biochemical that makes one
feel sated.  This is the second time I listened to this discussion (the
first was on the Science Friday podcast).

Throughout the NS discussion, it sounded as if one included this
chemical with the meal so that one would stop eating that meal sooner.  
It was only at the end of the conversation that he mentioned, in
passing, that the chemical is processed in the colon, and thus takes
effect 3 hours after one eats it.

This is not a very effective way to stop eating a meal. I  can eat a lot
in 3 hours.  And given the odd spacing of meals throughout the day, it
might not even help me with my next meal (since he never discussed  how
long the feeling of satiation stayed).  My evening meal is often more
than 6 hours after my mid day meal.

At first this sounds like a great idea, but the details make it seem
ridiculous.  Why was there no discussion about the difficulties that
this 3 hour delay will introduce in using this chemical?  Inadequate
coverage, not only by NS but by Science Friday.

Thanks for listening ... as I do to the NS

Jon
   

What do you think?