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Resistant Starch while fasting?

by 60 · April 24, 2014 at 10:53 AM

I typically Intermittent fast (leangains style) 16-18 hours every weekday with a 6-8 hour eating window. I've incorporated raw potato starch into my diet, but I think I might be breaking my fast by ingesting the potato starch first thing in the morning (after only 9 hours fasted). I've read that RS does not take one out of ketosis and I've read that as little as 10 calories is enough to break a fast. So what gives? Will taking 2 table spoons of raw potato starch break my fast?

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777 · April 24, 2014 at 10:53 AM

One of the major benefits of fasting is resting the digestive system so I wouldn't, I don't eat anything at all until my stomach is asking for food, it just makes sense to me.

If your fasting then don't eat anything or it isn't fasting, even if it was just psyllium husk (fibre/no nutrition) you'd be stressing your digestive system a bit ;)

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2272 · April 23, 2014 at 09:58 PM

I don't believe potato starch is PURE RS though...it contains RS, similar to how cooked and cooled sweet potatoes contain RS, however it is not 100% RS.

Also don't take my word for it, but I was under the impression that some it is still taken in as regular starch.

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225 · April 23, 2014 at 08:30 PM

Don't take my word on this, but my impression is that resistant starch is not digestable by you. In a sense you get a free pass as it will only be digested by the bacteria deep in your gut, and I believe they output saturated fat not carbs so you're probably safe.

Again...just speculation on my part, I have no actual knowledge on the topic.

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