Agback wrote:
No need to apologize, but I think it’s much less “plain wrong” than is “You must add in carbs in amounts to triger insulin responses,” since the very act of eating triggers an insulin release through mechanisms other than blood glucose.
Any such simplistic statements about how insulin works (with no fewer than five or six - I forget - stimulators, and at least two inhibitors) are bound to be flat-out wrong. Apparently, you’ll agree, as do the pages linked below, that other things besides carbs do, indeed, trigger insulin secretion from beta cells (like certain amino acids - from dietary proteins). You won’t agree regarding fats, however.
And I’ll readily admit that the online medical text I got that tidbit of information from may have been wrong (I can’t find it now, perhaps because it was, indeed, wrong). However, given the massive complexity of the human body, statements like your “Eating fats cannot stimulate the release of insulin” (emphasis mine) require just as much support as mine do (or k2dave’s do, for that matter).
Looking over the evidence I can find, I can see that other hormones actively suppress insulin secretion when fat is eaten. However, Wuesten (et al) recently showed that oral fat intake increases the sensitivity of beta-cells to glucose, which perhaps explains why Gannon (et al) previously found that eating fats with carbs provoked more of an insulin response than did eating carbs alone (which is perhaps why the text I’d read said that fats triggered insulin production on their own - was that their mistake?).
No matter what, as said above, simple statements which attempt to desribe very complex processes are bound to be incorrect (some more incorrect than others), and I thank you (and thus k2dave) for providing a stimulus for me to fight my own ignorance on this matter.
Here are just a few URLs for you, as promised above:[ul]
[li]http://www.pcosupport.org/living/nutrition/insulinre.php[/li][li]http://insulin-pumpers.org/howto/pfandbs-3.html[/li][li]http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/pancreas/insulin_phys.html[/li][/ul]