I need some help with fruit!

[Ricochet1990]

Hey guys im relatively new and i was just asking about this... Im read somewhere that fruit is bad for weightlifting because it has fructose (which if i remember correctly gets turned into fat later on)... Can someone tell me if this is true because I absolutely love fruit and I thought that they were a really healthy choice for you!

[kad]

Fruit is healthy, I've never heard of fructose being turned into fat...

[Built]

Well, fructose gets metabolized a little differently than other sugars, but the small amount in fresh fruit is hardly going to turn you into a tub. Whole fruit (not juice) is good for you. Eat whatever your calories allow you to.

[Ricochet1990]

Nah you see thats the problem with me. Since I dont eat chocolate (in order to cut back fat) I try to make up for it with massive ammounts of fruit (and I mean massive)

[Built]

It's still calories. If it fits your day's calories, you're fine.

[Slim Schaedle]

Fructose absorption is limited in nearly 60% of normal adults with intestinal distress (symptomatic of malabsorption) frequently showing in ingestion of over 50g.

Also, the thread below is mainly about juice, but since some juice contains high fructose corn syrup, alot of the info on metabolism may be of interest to you.

http://www.wannabebigforums.com/show...t=72469&page=3


Fuctose sucks

PS: fructose metabolism also depletes liver ATP stores pretty darn good.

[Slim Schaedle]

Fruit is healthy, I've never heard of fructose being turned into fat...

It sure can.

And, at a faster rate than glucose.

[Slim Schaedle]

It's still calories. If it fits your day's calories, you're fine.

I hate to do this, but I am going to have to correct you.

Slightly.


.....once liver glycogen is full, those fructose molecules have to go somewhere. They can't go to muscle cells. They are "trapped" by the liver.

One could be under caloric requirement, but excess consumption of fructose is going to be converted to fatty acids.

[Slim Schaedle]

Fructose does alot of other negative things, but after my 4 posts in a row, I think I will hold off for now.

Have a good night all you fruit eaters

[Built]

Slim, I suppose it becomes a problem if you're eating BOATLOADS of fruit. I eat a few pieces a day, but upon re-reading, it sounds like the OP eats BUCKETS of the stuff. Myself, I notice I can't eat a lot of fruit all at once, but if I trickle it in through the day with other foods, I'm fine.

If you don't mind, I'd love some really good references and more on other negative things fructose does (in sufficient quantities, obviously).

[Ricochet1990]

I got it from this site: http://www.abcbodybuilding.com/13wee...urningdiet.php

And it says:

The first aspect of this diet that I will address, is that it will be completely void of fructose. You will not be allowed to eat fruit throughout its duration. I am not attacking fruit, however, my goal here is to optimize your energy levels in the gym and in order to do this, I want you to focus on foods that promote this vital aspect. You see, if you are able to keep a solid energy level in the gym, you will maintain a higher percentage of muscle mass.

note: fruit has its place in bodybuilding, just not in the particular combination of macronutrients presented in this diet.

Fructose is primarily stored in the liver to be used as energy at a latter date. While it is less likely to be stored in your muscle cells. You only have so many calories to work with, and therefore, will not use them on a macronutrient that does not optimize our muscular energy stores, as we will need them in the gym to maintain our strength and endurance. By following this rule you will also maintain a better pump, even when dieting, than compared to a diet centered around fructose based foods. Therefore, your carbohydrates will be derived from slow burning starchy carbs, and fibrous greens. We will get into more detail over this further along in the article.

[brickt.]

1-2 apples a day ain't going to make you fat. The main concern would be a diet consisting of fruit, or one that has lots of High Fructose Corn Syrup or Sucrose (glucose + fructose)

[Slim Schaedle]

Yeah, anyone reading this... make sure you acknowledge the difference bewteen a few pieces and massive amounts, such as the original poster described.



Built, my info came from books/courses, etc. but I can try to look up some studies if I get a chance. I usually don't google this stuff.

[Built]

Thanks Slim - much obliged.

[kad]

It sure can.

And, at a faster rate than glucose.

Interesting. Would you care to expand on that a little? (I'm just curious.)

[Unreal]

Carbs can be converted to fat when you are in a caloric excess. Same with protein. What I think he is trying to say is Fructose is more easily and readily converted to fat since it is stored in the liver, and not muscles, so if your liver is full it gets converted, while other types of sugars will go to fill muscle glycogen stores before getting converted to fat.

[kad]

Nice post, thanks for clearing that up. I remember reading something about that in the UD2.0 book a while back, but it's been a while.

[Slim Schaedle]

Interesting. Would you care to expand on that a little? (I'm just curious.)

In a nutshell, the reason being what I pointed out earlier about fructose being phosphorylated in the liver. Going into all the pathways and enzymes will probably just bore you and isn't needed. (unless you want me to)

The same concept applies to galactose (coming from lactose consumption)

Both these can be converted to glucose 6-phosphate and be hydrolzed to free glucose in liver cells, but not muscle cells.

Glucose 6-phosphate can enter the hexomonophosphate shunt (pentose phosphate pathway) to produce fatty acids.

[Slim Schaedle]

Also, to expand on what I mentioned about frutose eating up liver ATP....this reduces the rate of other biosynthetic processes such as protein sysnthesis.

[Built]

Slim, please bore me.

[Slim Schaedle]

Slim, please bore me.

Are you sure?

[Built]

<yawn>

Ready.

[ddegroff]

ok now i know "exactly" why frutose is bashed.
thanks for the info slim!

[Slim Schaedle]

<yawn>

Ready.

I will get back to you on this. It takes some time to draw out/list everything.

I might just draw a diagram and post it. Probably the easiest to understand.

[bigshock]

I'm still waiting for you to tell me what your food intake is being that you weigh 60 lbs less than me and eat more food than I do.