Does adding fat/oil to whey REALLY slow down digestion?

[xonic2xonic2]

What is the reason/evidence for the suggestion that adding something like flax oil to whey powder will slow down it's digestion?

Thanks!

 

[Bulldog_10]

I don't think it's actually true. I think the reason people say this is because if you add fat to a meal, it will slow the digestion of the WHOLE MEAL. Key point being the whole meal.

It's like if there's a slow runner in a marathon. The whole marathon will take longer because he's running, but that doesn't change the time that the winner runs.

Fat is digested slower than carbs and protein...so fats are like the slow marathoner. They extend the duration of digestion of the meal...but don't change the speed of digestion of the rest of the meal.

 

[T2O]

I have heard flax oil and other oils can "coat" the stomach slowing down the digestion of many things. I have also heard mixing whey with milk will do the same thing because milk coats the stomach also. After a work out I only take whey with water. Before I go to bed I take it with milk and sometimes with flax oil to help ensure a slower release and more consistent release over night.

 

[slash747]

it would make sense to drink / eat the oil prior to youre protein then right?

 

[Bulldog_10]

it would make sense to drink / eat the oil prior to youre protein then right?

I suppose that could work...but I don't think it makes a difference either way. Just something supplement companies say to sell their product IMO.

I mean, just think about it...how much time could it actually delay the digestion of your protein...not very long. My guess would be a few minutes...tops.

 

[GoldenDelicious]

it slows down gastric emptying. (ie food being pumped from your stomach into your intestine)

yes its true, and fat being in the whole meal is the way to do it (NOT taking fat before the meal)

although i have been thinking about this lately and i have thought that using a drug which slows down gastric emptying (anti motility agents) might be really really useful with a bedtime shake)

cheers

 

[Slyder190]

Bulldog you bring up some interesting ways to look at things, but I must disagree for the fact that if you add fat or protein to carb meals, it lowers the glycemic index somewhat.

 

[Deleted member 33117]

Slyder is correct on this one. Fat slows down the absorbsion of both protien and carbs, and definately lowers their glycemic index (we all knew protien has a GI didn't we?). This is why high fat foods such as pizza and ice cream (if you get the full fat varity) actually have lower glycemic indexes than say brown rice or whole wheat bread, dispite having highly refinced carbs in them. If one is trying to slow down the absorbsion of whey, don't waste your time. Use it post workout and eat steak when trying to get slower absorbsion.

 

[Bulldog_10]

Bulldog you bring up some interesting ways to look at things, but I must disagree for the fact that if you add fat or protein to carb meals, it lowers the glycemic index somewhat.

Interesting. I didn't really think of it that way. Not sure if that changes my mind though...definitely makes me think though.

 

[drveejay11]

Slyder is correct on this one. Fat slows down the absorbsion of both protien and carbs, and definately lowers their glycemic index (we all knew protien has a GI didn't we?). This is why high fat foods such as pizza and ice cream (if you get the full fat varity) actually have lower glycemic indexes than say brown rice or whole wheat bread, dispite having highly refinced carbs in them. If one is trying to slow down the absorbsion of whey, don't waste your time. Use it post workout and eat steak when trying to get slower absorbsion.

Gastric emptying and Glycemic Response (post-prandial Insulin release) are two entirely different things. I tend to agree with Bulldog: The speculation that eating oils/fats with P-shakes slows breakdown is incorrect....and actually, the "marathon" analogy presented here by BD was an excellent one IMO! Good stuff Bulldog.

All this talk about delaying protein breakdown by adding fats/oils is over-played, incorrect and should be abandoned IMO!

 

[Bulldog_10]

Gastric emptying and Glycemic Response (post-prandial Insulin release) are two entirely different things. I tend to agree with Bulldog: The speculation that eating oils/fats with P-shakes slows breakdown is incorrect....and actually, the "marathon" analogy presented here by BD was an excellent one IMO! Good stuff Bulldog.

All this talk about delaying protein breakdown by adding fats/oils is over-played, incorrect and should be abandoned IMO!

I agree bro. They had me thinking about it, but the more i thought about it...I realized I'm right. The fats/oils only decrease the GI of the MEAL...not of the carbs and protein.

The gastric emptying may be a valid point, but it doesn't have the effects people think it has. It will only delay the transit time of the protein minimally.

 

[Deleted member 33117]

Yes, but it does delay the transit time. As I said before though, its really a waste of time to do this with whey. It still does not reduce it enough to make it useful for the purpose people try to use it for (pre-bedtime protien or as a meal). I still recomend (this is begining to sound like a broken record by now) eating a steak for this purpose. Please do not think that by my saying it "slows it down", which it clearly does, that it makes a whey/oil shake something useful. Personally I do not use protien shakes at all.

 

[Bulldog_10]

Yes, but it does delay the transit time. As I said before though, its really a waste of time to do this with whey. It still does not reduce it enough to make it useful for the purpose people try to use it for (pre-bedtime protien or as a meal). I still recomend (this is begining to sound like a broken record by now) eating a steak for this purpose. Please do not think that by my saying it "slows it down", which it clearly does, that it makes a whey/oil shake something useful. Personally I do not use protien shakes at all.

I'm in total agreement rob.

 

[T2O]

It would be to your benifit if you want the protien to be release slowly. IMO after a work out you want to shoot that stuff in you as quickly as possible.......so water only for me post work out and oil and/or milk later in the day. Or if I know I won't be able to hit the protien for awhile.

 

[Dirty V]

Ues a protein blend, Egg Albumen, casein, take much longer then whey to digest! whey is good immediatly after workout. Try Pro Blend 55.

 

[amactruck]

are there different brands or types of protein powder that would be better for taking immediatly after a work out and then a different one before bed..?

 

[xonic2xonic2]

Thanks ladies.

Yeah I am primarily concerned with nightime digestion.... I will try mixing ma whey with my udo's and also try cassein I thinks!

 

[Slyder190]

So BBF, what are the GI indexes of proteins?

 

[ProtienFiend]

I don't think it's actually true. I think the reason people say this is because if you add fat to a meal, it will slow the digestion of the WHOLE MEAL. Key point being the whole meal.

It's like if there's a slow runner in a marathon. The whole marathon will take longer because he's running, but that doesn't change the time that the winner runs.

Fat is digested slower than carbs and protein...so fats are like the slow marathoner. They extend the duration of digestion of the meal...but don't change the speed of digestion of the rest of the meal.

interesting concept, but it has been proven that when fat is eaten with a meal it lowers the GI (think absorbtion rate) of the entire meal... fats dont cause an insulin spike so it must blunt the effects of the other nutrients in the meal.

PF

 

[gonelifting]

dirty v made a good point. Use why after workouts and use a blend of caseine/egg/ whey (that`s what I use) for bedtime or other times of the day. Also when using whey, I go with a Whey Isolate instead of concentrate.

 

[Deleted member 33117]

So BBF, what are the GI indexes of proteins?

Good question, and I do not have an immediate answer. I could try to dig up some info, but do not expect to see steak and whey on the same chart. The cut of meat would GREATLY effect it, and higher fat cuts of meat would have much lower GI's. From research I've seen, whey not mixed with oil would have an extremely high GI compaired to other protiens, although I'm not sure it owuld be that high compaired to most carbs, per gram. I've got alot of research to do in developmental psych this week, but hit me up with the same question in a week or two, and I'll see what I can find for you.