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liftsiron
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TheMachine I hope that this abstract answers your questions.
Safflower oil consumption does not increase plasma conjugated linoleic acid concentrations in humans.
Herbel BK, McGuire MK, McGuire MA, Shultz TD
Am J Clin Nutr 1998 Feb 67:2 332-7
Abstract
Conjugated linoleic acid (CLA) is a mixture of positional and geometric isomers of linoleic acid (LA) with conjugated double bonds. CLA has anticarcinogenic properties and has been identified in human tissues, dairy products, meats, and certain vegetable oils. A variety of animal products are good sources of CLA, but plant oils contain much less. However, plant oils are a rich source of LA, which may be isomerized to CLA by intestinal microorganisms in humans. To investigate the effect of triacylglycerol-esterified LA consumption on plasma concentrations of esterified CLA in total lipids, a dietary intervention (6 wk) was conducted with six men and six women. During the intervention period a salad dressing containing 21 g safflower oil providing 16 g LA/d was added to the subjects' daily diets. Three-day diet records and fasting blood were obtained initially and during dietary and postdietary intervention periods. Although LA intake increased significantly during the dietary intervention, plasma CLA concentrations were not affected. Plasma total cholesterol and LDL-cholesterol concentrations were significantly lower after addition of safflower oil to the diet. In summary, consumption of triacylglycerol-esterified LA in safflower oil did not increase plasma concentrations of esterified CLA in total lipids.
Safflower oil consumption does not increase plasma conjugated linoleic acid concentrations in humans.
Herbel BK, McGuire MK, McGuire MA, Shultz TD
Am J Clin Nutr 1998 Feb 67:2 332-7
Abstract
Conjugated linoleic acid (CLA) is a mixture of positional and geometric isomers of linoleic acid (LA) with conjugated double bonds. CLA has anticarcinogenic properties and has been identified in human tissues, dairy products, meats, and certain vegetable oils. A variety of animal products are good sources of CLA, but plant oils contain much less. However, plant oils are a rich source of LA, which may be isomerized to CLA by intestinal microorganisms in humans. To investigate the effect of triacylglycerol-esterified LA consumption on plasma concentrations of esterified CLA in total lipids, a dietary intervention (6 wk) was conducted with six men and six women. During the intervention period a salad dressing containing 21 g safflower oil providing 16 g LA/d was added to the subjects' daily diets. Three-day diet records and fasting blood were obtained initially and during dietary and postdietary intervention periods. Although LA intake increased significantly during the dietary intervention, plasma CLA concentrations were not affected. Plasma total cholesterol and LDL-cholesterol concentrations were significantly lower after addition of safflower oil to the diet. In summary, consumption of triacylglycerol-esterified LA in safflower oil did not increase plasma concentrations of esterified CLA in total lipids.
THeMaCHinE
New member
It does go towards answering my question -- evidently, CLA is significantly different than plain LA; I guess there's no conversion of LA to CLA in this study.
However, the article does also mention that animal sources (i.e. animal fat) is a significant source of CLA; what it does not mention is how much CLA is found in animal fats... I'll do some looking around to determine this.
Potentially, depending on how much CLA is in animal fat, one could get their protein and CLA if meat ingestion was high enough...
However, the article does also mention that animal sources (i.e. animal fat) is a significant source of CLA; what it does not mention is how much CLA is found in animal fats... I'll do some looking around to determine this.
Potentially, depending on how much CLA is in animal fat, one could get their protein and CLA if meat ingestion was high enough...
liftsiron
New member
It does go towards answering my question -- evidently, CLA is significantly different than plain LA; I guess there's no conversion of LA to CLA in this study.
However, the article does also mention that animal sources (i.e. animal fat) is a significant source of CLA; what it does not mention is how much CLA is found in animal fats... I'll do some looking around to determine this.
Potentially, depending on how much CLA is in animal fat, one could get their protein and CLA if meat ingestion was high enough...
I just read another study that stated that you would need to eat 28 ounces of cheese to consume 3 to 4 grams of cla. That is enough cheese to bind you up for the remainder of the decade. I think from what I have been reading is that it is nearly impossible to get a desirable amount of cla from diet alone. Also I have been reading that newer methods of farming have lowered cla concentrations levels in grain and also livestock.
However, the article does also mention that animal sources (i.e. animal fat) is a significant source of CLA; what it does not mention is how much CLA is found in animal fats... I'll do some looking around to determine this.
Potentially, depending on how much CLA is in animal fat, one could get their protein and CLA if meat ingestion was high enough...
I just read another study that stated that you would need to eat 28 ounces of cheese to consume 3 to 4 grams of cla. That is enough cheese to bind you up for the remainder of the decade. I think from what I have been reading is that it is nearly impossible to get a desirable amount of cla from diet alone. Also I have been reading that newer methods of farming have lowered cla concentrations levels in grain and also livestock.
THeMaCHinE
New member
Cool, so you have started down that road -- have you looked at any meat sources? i.e. beef, chicken, etc...
Also, are there any studies on fat loss outside of mouse studies? I can't find any, but I haven't looked that hard yet either... Here's two mouse studies I found, but haven't looked up the abstract.
5. West DB, Delany JP, Camet PM, et al. Effects of conjugated linoleic acid on body fat and energy metabolism in the mouse. Am J Physiol 1998;275:R667–72.
6. Park Y, Albright KJ, Liu W, et al. Effect of conjugated linoleic acid on body composition in mice. Lipids 1997;32:853–8.
I did find:
Limited controlled human research found 5.6–7.2 grams per day of CLA produced nonsignificant gains in muscle size and strength in experienced and inexperienced weight-training men. (but really, that doesn't matter much since we're looking at it for fat loss, not muscle building)
7. Ferreira M, Krieder R, Wilson M. Effects of CLA supplementation during resistance training on body composition and strength. J Strength Conditioning Res 1998;11:280.
8. Lowery LM, Appicelli PA, Lemon PWR. Conjugated linoleic acid enhances muscle size and strength gains in novice bodybuilders. Med Sci Sports Exerc 1998;30:S182 [abstract]
Also, are there any studies on fat loss outside of mouse studies? I can't find any, but I haven't looked that hard yet either... Here's two mouse studies I found, but haven't looked up the abstract.
5. West DB, Delany JP, Camet PM, et al. Effects of conjugated linoleic acid on body fat and energy metabolism in the mouse. Am J Physiol 1998;275:R667–72.
6. Park Y, Albright KJ, Liu W, et al. Effect of conjugated linoleic acid on body composition in mice. Lipids 1997;32:853–8.
I did find:
Limited controlled human research found 5.6–7.2 grams per day of CLA produced nonsignificant gains in muscle size and strength in experienced and inexperienced weight-training men. (but really, that doesn't matter much since we're looking at it for fat loss, not muscle building)
7. Ferreira M, Krieder R, Wilson M. Effects of CLA supplementation during resistance training on body composition and strength. J Strength Conditioning Res 1998;11:280.
8. Lowery LM, Appicelli PA, Lemon PWR. Conjugated linoleic acid enhances muscle size and strength gains in novice bodybuilders. Med Sci Sports Exerc 1998;30:S182 [abstract]
