I can't wrap my head around...

  1. Senior Member
    carpee's Avatar
    Stats
    5'9"  200 lbs.
    Join Date
    May 2008
    Age
    27
    Posts
    2,607
    Rep Power
    83752
    Level
    38
    Lv. Percent
    57.98%
    Achievements Activity ProPosting Pro

    I can't wrap my head around...


    that apples are low on the GI list, but wheats are high..

  2. Board Sponsor
    Grambo's Avatar
    Stats
    5'11"  188 lbs.
    Join Date
    Mar 2004
    Posts
    3,883
    Rep Power
    1471966
    Level
    59
    Lv. Percent
    60.94%
    Achievements Activity AuthorityActivity ProPosting Pro

    The Glycemic Index is done by evaluating 50g of Carbohydrates by how they affect blood sugar. The problem is that 50g of one thing is not equal to another. Things like carrots 50g would be way more than you would eat in a sitting. There is a lot of talk about this on the net and many nutritionists are saying Glycemic Load is a better indicator.
    Head Purus Labs Rep
    www.Puruslabs.net
  3. NutraPlanet NinjaMonkey Rep
    Steveoph's Avatar
    Stats
    6'0"   lbs.
    Join Date
    Jan 2007
    Posts
    12,522
    Rep Power
    41251
    Level
    67
    Lv. Percent
    41.3%
    Achievements Activity AuthorityActivity ProPosting ProPosting AuthorityPosting Veteran

    Quote Originally Posted by Chargerfball25 View Post
    The Glycemic Index is done by evaluating 50g of Carbohydrates by how they affect blood sugar. The problem is that 50g of one thing is not equal to another. Things like carrots 50g would be way more than you would eat in a sitting. There is a lot of talk about this on the net and many nutritionists are saying Glycemic Load is a better indicator.
    Funny you should mention carrots. I've eaten 5lbs in the past 3 days I just re-discovered how great they taste with some roasted garlic and vegetable seasoning sprinkled on. Good call on the glycemic load though; that and GI should be looked at.
    •   
       

  4. Registered User
    RedwolfWV's Avatar
    Stats
    5'10"  185 lbs.
    Join Date
    Dec 2005
    Age
    50
    Posts
    3,258
    Rep Power
    1988
    Level
    40
    Lv. Percent
    33.48%
    Achievements Activity ProPosting Pro

    The sugar in fruits is not usable by the body until it has been processed in the liver (I forget into what form of sugar) But this takes time, and that is why most fruits are low on the GI list
  5. Senior Member
    carpee's Avatar
    Stats
    5'9"  200 lbs.
    Join Date
    May 2008
    Age
    27
    Posts
    2,607
    Rep Power
    83752
    Level
    38
    Lv. Percent
    57.98%
    Achievements Activity ProPosting Pro

    so wheats are still preferred for complex carbs?
  6. Board Sponsor
    Grambo's Avatar
    Stats
    5'11"  188 lbs.
    Join Date
    Mar 2004
    Posts
    3,883
    Rep Power
    1471966
    Level
    59
    Lv. Percent
    60.94%
    Achievements Activity AuthorityActivity ProPosting Pro

    100% whole wheat anything is always the superior choice.

  7. Senior Member
    carpee's Avatar
    Stats
    5'9"  200 lbs.
    Join Date
    May 2008
    Age
    27
    Posts
    2,607
    Rep Power
    83752
    Level
    38
    Lv. Percent
    57.98%
    Achievements Activity ProPosting Pro

    i've really stuck to oats lately. i've been looking for ezekiel bread but can't find it anywhere around here. other than that i look for breads that are whole wheat and no HFCS
  8. Board Sponsor
    Grambo's Avatar
    Stats
    5'11"  188 lbs.
    Join Date
    Mar 2004
    Posts
    3,883
    Rep Power
    1471966
    Level
    59
    Lv. Percent
    60.94%
    Achievements Activity AuthorityActivity ProPosting Pro

    Love Oats I eat a bunch everyday. Ya as far as bread make sure it's 100% and you are good to go. Good call on avoiding HFCS, bad stuff.

  9. New Member
    robotj's Avatar
    Stats
    6'5"  220 lbs.
    Join Date
    Feb 2009
    Posts
    23
    Rep Power
    82
    Level
    4
    Lv. Percent
    69.67%

    Quote Originally Posted by carpee View Post
    i've really stuck to oats lately. i've been looking for ezekiel bread but can't find it anywhere around here. other than that i look for breads that are whole wheat and no HFCS
    Sara lee makes a good one, no HFCS, 100% whole wheat...good enough to eat plain. I have a whole loaf in my desk here at work.
  10. New Member
    PublicEnemy's Avatar
    Stats
    5'8"  150 lbs.
    Join Date
    Feb 2009
    Posts
    472
    Rep Power
    70168
    Level
    20
    Lv. Percent
    79.04%

    The sugar in fruits is not usable by the body until it has been processed in the liver (I forget into what form of sugar) But this takes time, and that is why most fruits are low on the GI list
    The monosaccharide in fruits is fructose... that and the third monosaccharide galactose have to be taken to the liver in order to metabolized into glucose (otherwise known as dextrose).
  11. Senior Member
    carpee's Avatar
    Stats
    5'9"  200 lbs.
    Join Date
    May 2008
    Age
    27
    Posts
    2,607
    Rep Power
    83752
    Level
    38
    Lv. Percent
    57.98%
    Achievements Activity ProPosting Pro

    I used to get Sara Lee...but the kind I kept finding did have HFCS. I switched over to brownberry whole wheat. Its pretty good, but actually I haven't had any bread in a while, I've stuck mostly to oats and sweet potatoes.
  12. New Member
    robotj's Avatar
    Stats
    6'5"  220 lbs.
    Join Date
    Feb 2009
    Posts
    23
    Rep Power
    82
    Level
    4
    Lv. Percent
    69.67%

    Yea man.... at work i just nuke some precooked butterball turkey sausages and use the sara lee bread as hotdog bun sort of. Its good times and it may be a new recipe but the kind i get is HFCS free and pretty cheap.
  13. Advanced Member
    sethroberts's Avatar
    Join Date
    Jul 2003
    Age
    41
    Posts
    863
    Rep Power
    607
    Level
    22
    Lv. Percent
    69.78%

    Quote Originally Posted by RedwolfWV View Post
    The sugar in fruits is not usable by the body until it has been processed in the liver (I forget into what form of sugar) But this takes time, and that is why most fruits are low on the GI list
    As far as I remember, fructose does not have to be converted to glucose in order to be utilized.
  14. New Member
    PublicEnemy's Avatar
    Stats
    5'8"  150 lbs.
    Join Date
    Feb 2009
    Posts
    472
    Rep Power
    70168
    Level
    20
    Lv. Percent
    79.04%

    As far as I remember, fructose does not have to be converted to glucose in order to be utilized.
    Yes it does.
  15. Advanced Member
    sethroberts's Avatar
    Join Date
    Jul 2003
    Age
    41
    Posts
    863
    Rep Power
    607
    Level
    22
    Lv. Percent
    69.78%

    Quote Originally Posted by PublicEnemy View Post
    Yes it does.
    Thanks for the engaging discourse.

    Furthermore, we do not possess an enzyme that can catalyze conversion of F-1-P to F-6-P. We must therefore split F-1-P into two 3-carbon fragments, dihydroxyacetone phosphate and glyceraldehyde. The latter is then phosphorylated at the expense of an ATP. The resulting DAP and GAP then enter glycolysis and can, in theory, enter gluconeogenesis or aerobic glycolysis.

    Although DAP and GAP can be converted to glucose, it takes considerable energy to do so it is not likely since fructose in rapidly metabolized in the liver.
  16. New Member
    PublicEnemy's Avatar
    Stats
    5'8"  150 lbs.
    Join Date
    Feb 2009
    Posts
    472
    Rep Power
    70168
    Level
    20
    Lv. Percent
    79.04%

    Thanks for the engaging discourse.
    No problem.

    Furthermore, we do not possess an enzyme that can catalyze conversion of F-1-P to F-6-P. We must therefore split F-1-P into two 3-carbon fragments, dihydroxyacetone phosphate and glyceraldehyde. The latter is then phosphorylated at the expense of an ATP. The resulting DAP and GAP then enter glycolysis and can, in theory, enter gluconeogenesis or aerobic glycolysis.

    Although DAP and GAP can be converted to glucose, it takes considerable energy to do so it is not likely since fructose in rapidly metabolized in the liver.
    I think I just misunderstood your initial post. I was thinking of utilized in the context of fructose molecules being present in the bloodstream along with glucose. My apologies. And I even learned something new today!
  17. Advanced Member
    sethroberts's Avatar
    Join Date
    Jul 2003
    Age
    41
    Posts
    863
    Rep Power
    607
    Level
    22
    Lv. Percent
    69.78%

    Quote Originally Posted by PublicEnemy View Post
    No problem.



    I think I just misunderstood your initial post. I was thinking of utilized in the context of fructose molecules being present in the bloodstream along with glucose. My apologies. And I even learned something new today!
    Sorry for the sarcasm. Fructose can (and is) converted to glucose -- that is sure. It does not need to be though and unlike glucose does not pass through the liver into the blood stream but is metabolized quickly by the liver. The enzyme required to initiate fructose metabolism (fructokinase) is only found in the liver. Fructose is not a direct energy source for other tissues. Fructose metabolism is not controlled. It goes very quickly forward unrelated to hepatic energy utilization. This results in an increased synthesis of lipids and increased serum lipoproteins.
  18. New Member
    PublicEnemy's Avatar
    Stats
    5'8"  150 lbs.
    Join Date
    Feb 2009
    Posts
    472
    Rep Power
    70168
    Level
    20
    Lv. Percent
    79.04%

    Fructose metabolism is not controlled. It goes very quickly forward unrelated to hepatic energy utilization. This results in an increased synthesis of lipids and increased serum lipoproteins.
    My basic understand is that fructose is metabolized by the liver. So delving into the specifics is something I find rather interesting.

    What is fructose's role in liver glycogen then? Once or if liver glycogen stores are filled then DAP and GAP are preferentially metabolized into lipoproteins with minimal impact on blood glucose?
  19. Board Moderator
    Never enough
    EasyEJL's Avatar
    Stats
    5'10"  205 lbs.
    Join Date
    Jun 2007
    Age
    47
    Posts
    31,878
    Rep Power
    778120
    Level
    95
    Lv. Percent
    28.65%
    Achievements Activity VeteranActivity RoyaltyActivity ProActivity AuthorityPosting Pro

    Quote Originally Posted by carpee View Post
    so wheats are still preferred for complex carbs?
    Quote Originally Posted by Chargerfball25 View Post
    100% whole wheat anything is always the superior choice.


    ewwww no, wheat is towards the bottom of the list. Quinoa, brown rice, wild rice, oats are all far better choices. Bulgur wheat, couscous, etc. For the most part any baked goods kind of suck.

    that said, man I go thru a bunch of the thomases light whole grain english muffins no HFCS, 8g of fiber per muffin, and only 24g carbs TOTAL, so 16 net.

    otal Fat 1g 2%
    Saturated Fat 0g 0%
    Monounsaturated Fat 0g
    Polyunsaturated Fat 0g
    Trans Fat 0g
    Cholesterol 0mg 0%
    Sodium 190mg 8%
    Total Carbohydrate 24g 8%
    Dietary Fiber 8g 32%
    Sugars 1g
    Protein 5g 10%
    great with some natty pb and no sugar added jellies
  20. Advanced Member
    sethroberts's Avatar
    Join Date
    Jul 2003
    Age
    41
    Posts
    863
    Rep Power
    607
    Level
    22
    Lv. Percent
    69.78%

    Quote Originally Posted by PublicEnemy View Post
    My basic understand is that fructose is metabolized by the liver. So delving into the specifics is something I find rather interesting.

    What is fructose's role in liver glycogen then? Once or if liver glycogen stores are filled then DAP and GAP are preferentially metabolized into lipoproteins with minimal impact on blood glucose?
    From what I read it seems that fructose is primarily matoblized to free fatty acds and secondarily to gluconeogenesis -- so it can have an impact on plasma glucose. Also, chronic consumption of fructose is a laboratory model for high cholesterol/hypertriglyceridemia due to the increase in fatty acid synthesis.
  21. New Member
    PublicEnemy's Avatar
    Stats
    5'8"  150 lbs.
    Join Date
    Feb 2009
    Posts
    472
    Rep Power
    70168
    Level
    20
    Lv. Percent
    79.04%

    From what I read it seems that fructose is primarily matoblized to free fatty acds and secondarily to gluconeogenesis -- so it can have an impact on plasma glucose. Also, chronic consumption of fructose is a laboratory model for high cholesterol/hypertriglyceridemia due to the increase in fatty acid synthesis.
    It's nice to have an "ah-ha" moment as the pieces of the puzzle come together. Now I have a better scientific understanding of the health impacts of HFCS besides the fact that ingesting high GI sugars isn't necessarily the best thing for ones body.
  22. Senior Member
    carpee's Avatar
    Stats
    5'9"  200 lbs.
    Join Date
    May 2008
    Age
    27
    Posts
    2,607
    Rep Power
    83752
    Level
    38
    Lv. Percent
    57.98%
    Achievements Activity ProPosting Pro

    Quote Originally Posted by EasyEJL View Post
    ewwww no, wheat is towards the bottom of the list. Quinoa, brown rice, wild rice, oats are all far better choices. Bulgur wheat, couscous, etc. For the most part any baked goods kind of suck.

    that said, man I go thru a bunch of the thomases light whole grain english muffins no HFCS, 8g of fiber per muffin, and only 24g carbs TOTAL, so 16 net.



    great with some natty pb and no sugar added jellies


    yea man, i love those. I used to have one with nat pb and a sliced up banana
  23. New Member
    redemption79's Avatar
    Stats
    5'8"  185 lbs.
    Join Date
    Aug 2008
    Age
    35
    Posts
    343
    Rep Power
    259
    Level
    15
    Lv. Percent
    34.48%

    Fructose is a lower GI sugar, but the peel of an apple also contains a decent amount of fiber, which lowers the GI of the fruit. Take the peel off and the GI goes up drasticaly. Watermelon, for example, is a higher GI fruit, due in part to the lack of fiber content.
  24. Board Moderator
    Never enough
    EasyEJL's Avatar
    Stats
    5'10"  205 lbs.
    Join Date
    Jun 2007
    Age
    47
    Posts
    31,878
    Rep Power
    778120
    Level
    95
    Lv. Percent
    28.65%
    Achievements Activity VeteranActivity RoyaltyActivity ProActivity AuthorityPosting Pro

    The thing to think about in your complex carbs is biological anthropology - how did we evolve, what were our primary food sources through that. really "whole grains" we would have almost never eaten, other than if some happened to be in the stomach of an animal we were eating
  25. NutraPlanet NinjaMonkey Rep
    Steveoph's Avatar
    Stats
    6'0"   lbs.
    Join Date
    Jan 2007
    Posts
    12,522
    Rep Power
    41251
    Level
    67
    Lv. Percent
    41.3%
    Achievements Activity AuthorityActivity ProPosting ProPosting AuthorityPosting Veteran

    Quote Originally Posted by redemption79 View Post
    Fructose is a lower GI sugar, but the peel of an apple also contains a decent amount of fiber, which lowers the GI of the fruit. Take the peel off and the GI goes up drasticaly. Watermelon, for example, is a higher GI fruit, due in part to the lack of fiber content.
    Well if we're being picky about fiber, a medium apple has around 4.1g of fiber, and without the skin it's only about 3.5 [Source = Dr. Joe Schwarz's Book and Apple A day... but I couldnt find the exact #'s. very close to that though)
  26. Banned
    p00ndawg's Avatar
    Stats
    5'8"  190 lbs.
    Join Date
    Jan 2009
    Posts
    539
    Rep Power
    0
    Level
    18
    Lv. Percent
    80.93%

    are oats just oats? or are there like wheat oats or something?
  

  
 

Similar Forum Threads

  1. Replies: 22
    Last Post: 01-30-2009, 06:42 PM
  2. Leviathan Re-loaded and Recreate (HEAD-2-HEAD Review)
    By SuppKnight in forum Supplement Logs
    Replies: 18
    Last Post: 01-08-2009, 05:04 PM
  3. To wrap or not to wrap
    By jon1026 in forum Exercise Science
    Replies: 4
    Last Post: 12-26-2006, 02:55 PM
  4. To wrap or not to wrap
    By jon1026 in forum Training Forum
    Replies: 0
    Last Post: 12-20-2006, 06:16 PM
  5. Neoprene wrap??
    By littlemark in forum Exercise Science
    Replies: 5
    Last Post: 10-27-2004, 12:09 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Log in
Log in