I have read numerous articles stating that you shouldn't eat fruit and protein together because the fruit will ferment in your gut and you will not reap any nutritional benefits from the fruit. However, I have yet to find solid scientific evidence to back up this claim. This worries me because I always mix bananas and other fruits in my whey protein shakes. Can anyone shed some light on this? Thanks guys!
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H&R Moderators: VerbalTruist
Fruit with Protein?
- Thread starter LOGan1314
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addictivepersona
Bluelight Crew
Fruit will "ferment in your gut" with or without protein as much as chewing gum will remain there for seven years. ;)
B1tO'RoughJack
Bluelighter
^sources? As far as I am aware it is not good food combining and will indeed ferment...however fruit is fruit, and as long as you don't have too many sugars mixed with other carbs then it's not too bad. You will just feel less energy than if you ate the fruit as soon as you came out the gym (post-workout shake?), then had the shake an hour later.
Also can I ask you why you're having protein shakes at all, instead of a well balanced diet? What kind of workout are you working with?!?!
Also can I ask you why you're having protein shakes at all, instead of a well balanced diet? What kind of workout are you working with?!?!
pwo shakes are a necessity for bb, pl, and ol. don't listen to anyone who says they aren't. the quick breakdown of whey combined with an insulin spike (maltodextrin) when your muscles are needing it is very important. "real food" takes too long to digest during the small window after a workout that the body needs. then follow up with a meal a bit after the workout.
Polluted_Mind
Bluelighter
- Joined
- Nov 25, 2012
- Messages
- 187
This is why you should never trust internet articles, particularly those about nutrition which always seem to be full of fallacies.
Fermentation of fruit doesn't occur at all in the human stomach.
Fermentation of fruit doesn't occur at all in the human stomach.
Lmfao.
addictivepersona
Bluelight Crew
Two professors, each with an RD and CDN, and another professor with just an RD. Believe what you want.
B1tO'RoughJack
Bluelighter
nope. I know that they are - I used to use them. I then came up with my own ways of getting enough protein, by changing everything else instead. Whey protein is unnecessary, but is a good stopgap until you find other means.
dude just stop... until you do your research stop spreading misinformation. Pop on over to SD and spout this shit and see what'll happen.
www.sciencedaily.com/releases/2011/08/110818132225.htm
Jabberwocky
Frumious Bandersnatch
what 'other means' are superior to whey shakes for post-workout protein? can't wait to hear this lol 8)
/aep/sl/cotb, i'll be gentle, plz don't edit/ua this post!
I wish the etiquette here was as lenient as SD is lmao. I really wanna see what would happen if he posted this, I guess we can call it information, in SD. XD
Polluted_Mind
Bluelighter
- Joined
- Nov 25, 2012
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- 187
**EDIT: Sorry, for some reason I thought you were talking about the stomach, have no idea why, must've been drunk.
Fermentation will occur in the colon, but this is mostly the bacteria digesting the fibre. Also by the time this gets to the colon the sugar and vitamins have ALREADY been absorbed by the small intestine, hence any nutritional gain from that fruit has already taken place. This means the sentence " the fruit will ferment in your gut and you will not reap any nutritional benefits from the fruit" is nonsensical.
Furthermore the fibre from fruit will ferment in your colon whether you consume it with protein or not.
So yeah this is just another retarded internet rumour.
Anyway, I think you might find this interesting as it shows consuming some fruits can affect protein digestion (which is sort of visa versa to the scenario you were suggesting, but it may be the origin of this myth):
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The inhibitory effects of berry polyphenols on digestive enzymes.
Biofactors. 2005;23(4):189-95.
Abstract
The evidence for the effect of polyphenol components of berries on digestive enzymes is reviewed. Anthocyanins inhibit alpha-glucosidase activity and can reduce blood glucose levels after starch-rich meals, a proven clinical therapy for controlling type II diabetes. Ellagitannins inhibit alpha-amylase activity and there is potential for synergistic effects on starch degradation after ingestion of berries such as raspberries and strawberries, which contain substantial amounts of ellagitannins and anthocyanins. A range of berry polyphenols (e.g. flavonols, anthocyanidins, ellagitannins and proanthocyanidins) can inhibit protease activities at levels which could affect protein digestion in the gastrointestinal tract. In contrast, potential for the inhibition of gastrointestinal lipase activity, a proven therapeutic target for the control of obesity through reduced fat digestion, may be limited to proanthocyanidins. Taking into account the manifold possible synergies for inhibition of starch, protein and/or lipid digestion by the spectrum of polyphenol components present within berry species, the inhibition of digestive enzymes by dietary polyphenols may represent an under-reported mechanism for delivering some of the health benefits attributed to a diet rich in fruit and vegetables.
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The issue with the above is: Dietary polyphenols in some fruits -> inhibition of proper protein digestion -> colonic protein fermentation -> potentially carcinogenic products.
Fermentation will occur in the colon, but this is mostly the bacteria digesting the fibre. Also by the time this gets to the colon the sugar and vitamins have ALREADY been absorbed by the small intestine, hence any nutritional gain from that fruit has already taken place. This means the sentence " the fruit will ferment in your gut and you will not reap any nutritional benefits from the fruit" is nonsensical.
Furthermore the fibre from fruit will ferment in your colon whether you consume it with protein or not.
So yeah this is just another retarded internet rumour.
Anyway, I think you might find this interesting as it shows consuming some fruits can affect protein digestion (which is sort of visa versa to the scenario you were suggesting, but it may be the origin of this myth):
---------------------------------------------------------------------------------
The inhibitory effects of berry polyphenols on digestive enzymes.
Biofactors. 2005;23(4):189-95.
Abstract
The evidence for the effect of polyphenol components of berries on digestive enzymes is reviewed. Anthocyanins inhibit alpha-glucosidase activity and can reduce blood glucose levels after starch-rich meals, a proven clinical therapy for controlling type II diabetes. Ellagitannins inhibit alpha-amylase activity and there is potential for synergistic effects on starch degradation after ingestion of berries such as raspberries and strawberries, which contain substantial amounts of ellagitannins and anthocyanins. A range of berry polyphenols (e.g. flavonols, anthocyanidins, ellagitannins and proanthocyanidins) can inhibit protease activities at levels which could affect protein digestion in the gastrointestinal tract. In contrast, potential for the inhibition of gastrointestinal lipase activity, a proven therapeutic target for the control of obesity through reduced fat digestion, may be limited to proanthocyanidins. Taking into account the manifold possible synergies for inhibition of starch, protein and/or lipid digestion by the spectrum of polyphenol components present within berry species, the inhibition of digestive enzymes by dietary polyphenols may represent an under-reported mechanism for delivering some of the health benefits attributed to a diet rich in fruit and vegetables.
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The issue with the above is: Dietary polyphenols in some fruits -> inhibition of proper protein digestion -> colonic protein fermentation -> potentially carcinogenic products.
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Jabberwocky
Frumious Bandersnatch
^my understanding of that study was that we're talking delays in digestion via inhibiting those digestive enzymes (ie slowing digestion, not stopping it; this is of use to diabetics and ppl who want to better regulate insulin-response)
Polluted_Mind
Bluelighter
- Joined
- Nov 25, 2012
- Messages
- 187
^ Yeah it is 'inhibition' of the proteases relative to the type and amount of polyphenols consumed, not saying that all protein digestion is inhibited. That's why I lazily said "proper" protein digestion rather than belabouring the point. This increases the chance of it passing to the colon not properly catabolized and so fermenting.
But yeah it seems rather than protein causing fruit to ferment (which it does anyway, or at least the fibre in it does, regardless of any protein), it's actually the case that some fruits increase the chance of protein fermenting (and also can inhibit lipid and starch digestion; once again though I mean inhibition of the lipase/amylase proportional to the amount and type of polyphenol, and hence "inhibition of proper digestion", not stopping digestion altogether. I thought that would be obvious though and that's the way the author of the paper wrote it).
So I'm guessing someone picked up this factoid, then through a process of Chinese whispers 100-fold the facts became very skewed, and eventually turned on their head.
But yeah it seems rather than protein causing fruit to ferment (which it does anyway, or at least the fibre in it does, regardless of any protein), it's actually the case that some fruits increase the chance of protein fermenting (and also can inhibit lipid and starch digestion; once again though I mean inhibition of the lipase/amylase proportional to the amount and type of polyphenol, and hence "inhibition of proper digestion", not stopping digestion altogether. I thought that would be obvious though and that's the way the author of the paper wrote it).
So I'm guessing someone picked up this factoid, then through a process of Chinese whispers 100-fold the facts became very skewed, and eventually turned on their head.
Jabberwocky
Frumious Bandersnatch
but is the mechanism something wherein there's not proper digestion by the time it's excreted? or simply a matter of the inhibition slowing the digestion (only delaying- not stopping- the digestion)?
/because my understanding is that such methods are good for slowing the insulin/digestion response
Jabberwocky
Frumious Bandersnatch
a partially-fermented kiwi would only yield minimal amounts of ethanol; have you used a fine BAC breathalyzer several hours after dinner to confirm you were not, in fact, fermenting fruit in your tummy?
emkee_reinvented
Bluelighter
All fruits or at least most of them also contain protein so the combination in itself seems pretty normal.
There are even high protein fruits like Durian which are rumored quite nutritious.
So I am assuming you mean combining fruits with other foodgroups high in protein.
Depending on which theorie you follow some combinations could be ok try to dig some up later, but its best to just listen to the body.
Nobody really knows accept the digestion has preferences which differ from theorie to theorie.
There are even high protein fruits like Durian which are rumored quite nutritious.
So I am assuming you mean combining fruits with other foodgroups high in protein.
Depending on which theorie you follow some combinations could be ok try to dig some up later, but its best to just listen to the body.
Nobody really knows accept the digestion has preferences which differ from theorie to theorie.