Such as from fruits like berries and apples, or drinks like tea and coffee? I do consume those (including even green coffee, which I started experimenting with before I learned that Dr. Oz was recommending it ) and do eat fruits (and other foods that are offered as alternatives to RS sources, such as inulin-rich foods and butter). They didn't reset my glucose levels though. Didn't happen until I started consuming more RS sources, and then it occurred quickly and easily. I'm curious about how and why and found these interesting links. It's not necessarily what happened with me, of course, but they are interesting correlations. RS-rich foods were the one type of primal template foods that were most absent from my diet, due to eliminating grains and legumes and not eating other sources like plantains often until recently.
Until Otzi and Richard N. started talking about RS, I rarely saw it discussed in the Paleosphere. Lots of stuff about the wonders of bacon, butter, butter coffee, nonstarchy veggies, sweet fruits, even Coca Cola from the Peatarians , more recently safe starches and potato hacks, and here and there yogurt, kefir or kombucha (raw store kombucha was a major fail for me, BTW, even though I benefit from small amounts of raw fermented honey--very strange) but very little about RS until more recently.
Unfortunately, I was somewhat one of the guilty parties. When someone started a thread about RS at another forum, I looked for info on it, found Michael Eades dismissing it (claiming that butter provides all the butyrate one needs). I did what some folks here did and asked why I couldn't get all the butyrate I need from butter, like Dr. Eades suggested. The gut bacteria connection was explained to me, but since I was already eating butter, I first tried eating still MOAR butter and even taking butyrate supplements (when still nothing changed I even tried more than the recommended intake of the supplements). I figured I would do everything I could with the Eades' butter hypothesis first. Then I grudgingly tried RS. Bingo! Quick, easy, painless reduction in BG levels. I'm not a fan of quick fixes, so this was quite a surprise to me. I was actually more interested in the potential GI benefits, but I'm not complaining about the BG improvements.
So far there are limits to the improved BG sensitivity, so I haven't achieved super-high Kitavan-like sensitivity (though my FBG did drop to 69 one morning, which is not far off the Kitavan avg of 66). I still can spike my BG with sufficient straight glucose via brown rice syrup, but that's not terribly surprising. More testing and open-minded inquiry to come. Time will tell.
Sidebar: the Kitavans don't seem to consume a lot of foods that we would normally think of when thinking of RS, per the reports I've seen, but Western observers appear to have largely ignored the fermentation aspect (as they often do) of the Kitavan diet, which Stephan Guyenet wisely guessed: http://wholehealthsource.blogspot.co...h-kitavan.html.
Others have hypothesized a RS connection in the Kitavan diet, in the comments of Stephan's post and here:
Michal Piják, MD - Personalized Paleo Nutrition · 667 like this
January 1 at 11:10am ·
SECRET OF KITAVAN´S DIET - RESISTANT STARCH ??
One commenter there wrote: "if you've ever been insulin resistant I believe you have lost all you're high-carb privileges for life." So-called "safe starches" were a problem for me. I became more insulin resistant on a largely starch-free diet and suspected that I would have to greatly limit carbs (aside from nonstarchy veg and my better-tolerated fruits like berries, modest amounts of sheep cheese, occasional small amounts of sheep yogurt, and, oddly enough, raw fermented honey in small amounts) for the rest of my life to avoid high BG spikes and other negative health effects and probably also have physiological IR with high FBG for the rest of my life, but I kept my eyes open for other possibilities and that seems to have paid off, though it's too early to tell for sure.
Otzi, do you know anything about RS in the Kitavan diet?