i was doing some reading and came across this website. very informative if i must say.
i was wondering if the comment about mono-saccharides not being fed to the bacteria being true as i thought fruit sugars fed bacteria?
could someone explain further please?
asked bysunandmoon (501)
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on August 24, 2012
at 04:20 PM
The Med diet also included many days of fasting/ food restriction
A paleo diets seem to outperform them..
And a Med diet doesn't necessarily even lower inflammation
on August 24, 2012
at 02:11 PM
Bacteria can eat basically any carb. The only carbs that are quickly digested are small amounts of fructose (under a certain low threshold), and any amount of glucose. Eating alot of fruit (which also have sucrose and galactose), will be as problematic for gut bacteria as using alot of sugar, if your concerned about the impact on gut flora (perhaps moreso if the fruit has galactose).
As you might imagine that will depend on the fruit, and the quantity consumed. There is large variation in the sugars in fruits. For example, cranberry is mostly glucose, and pineapple is mostly sucrose, whereas the majority of fruits, on average have some amount of glucose and fructose, and also sometime some sucrose. It varies from fruit to fruit.
But then again, it terms of your gut bacteria, alot of acellular carbs (ie grains), or in fact lots of starch, in general, is very similar in that respect.
Starch is just a bunch of glucose stuch together, and it takes your digestion along time to get it all unstuck. If you have gut bacterial issues (like I do), your tolerance to most carbs (simple or complex) can be quite bad. Not so in healthy people though.
Macronutrients do effect gut flora, in healthy people, but we dont know what ratio is optimal, and we dont know much about gut bacteria either.
Its probably not mostly carbs though, given thats hard to do with fruits, tubers and roots in most enviroments (IMO). Its certainly not lots of refined sucrose (due to the high fructose u get exposed too).
Gut bacteria, might be one reason not to have a very high carb intake in general(along with metabolism). Its a possibly good rationale for avoiding grains altogether and using tubers and roots instead, due to the fact our gut biome is not evolved to be used to acellular carbs, and acellular carbs probably influence gut bacteria more than cellular ones.
But its not really something specific to sucrose. Sucrose has its own issues as well though, as I mentioned above.