Thermogenics: A Systematic Review about the use of Coconut Oil, Safflower Oil and CLA
Abstract
Introduction and objectives: We performed a systematic review, with the aim of identifying the main evidence of the use of coconut oil, safflower oil and conjugated linoleic acid in reducing body fat. Materials and methods: The study included only the results of meta-analyzes, clinical trials, case-control studies and case series conducted in humans, published in the last 10 years. Results: The evidences showed that supplementation with conjugated linoleic acid or safflower oil in addition to promoting thermogenic action, provided changes in anthropometric parameters in most studies, with significant reduction in weight, BMI and body fat. Discussion: The results were more evident in studies that combined supplementation with diet and regular physical exercise, which puts in doubt the action of these supplements. No evidence was found that ensure that coconut oil decrease body fat. Conclusion: Depending on the findings of dubious character of these oils supplementation, the differences in methods used in the studies and the lack of mechanisms involved in the results, it is concluded that this type of supplementation has no effect on body fat reduction, necessitating a greater number of studies that prove their efficiency and safety.
References
-Assunção, M.; Ferreira, H. S.; Santos, A. F.; CabralJr., C. R.; Florêncio, T. M. M. T. Effects of Dietary Coconut Oil on the Biochemical and Anthropometric Profiles of Women Presenting Abdominal Obesity. Lipids. Maceió. Vol. 44. Num. 7. 2009. p. 593-601.
-Boschini, R. P.; Garcia Jr. UCP2 and UCP3 genic expression: regulation by food restriction, fasting and physical excersise. Revista de Nutrição. Presidente Prudente. Vol. 18. Num. 6. 2005. p. 753-764.
-Brugère, C. M.; Mensink, R. P.; Loreau, O.; Maret, A.; Fernie, C. E.; Lassel, T. S.; Chardigny, J. M.; Scrimgeour, C. M.; Sébèdio, J. L.; Beaufrè, B. Comparison of Postprandial Oleic Acid, 9c,11t CLA and 10t,12c CLA Oxidation in Healthy Moderately Overweight Subjects. Lipids. Saint Genès Champanelle. Vol. 45. Num. 11. 2010. p. 1074-1051.
-Close, R. N.; Schoeller, D. A.; Watras, A. C.; Nora, E. H. Conjugated linoleic acid supplementation alters the 6-mo change in fat oxidation during sleep. The American Journal of Clinical Nutrition. Winsconsin. Vol. 86. Num. 3. 2007. p. 797-804.
-Colakoglu, S.; Colakoglu, M.; Taneli, F.; Cetonoz, F.; Turkmen, M. Cumulative effects of conjugated linoleic acid and exercise on endurance development, body composition, serum leptin and insulin levels. Jounal of Sports Medicine and Physical Fitness. Manisa. Vol. 46. Num. 4. 2006. p. 570-577.
-Garcia, JR,; Lagranha, CJ,; Phiton-curi, TC. Metabolismo dos Ácidos Graxos no Exercício Físico. IN Entendendo a gordura: os ácidos graxos. Curi R, Pompéia C, Miyasaka CK, Procopio J. São Paulo. Manole. 2002.
-Gaullier, J. M.; Halse, J.; Hoivik, H. O.; Hoye, K.; Syvertsen, C.; Nurminiemi, M.; Hassfeld, C.; Einerhard, A.; O’shea, M.; Gudmundsen, O. Six months supplementation with conjugated linoleic acid induces Regional specific fat mass decreases in overweight and obese. British Journal of Nutrition. Netherlands. Vol. 97. Num. 3. 2007. p. 550-560.
-Gaullier, J. M.; Halse, J.; Hoye, K.; Kristiansen, K.; Fagertun, H.; Vik, H.; Gudmundsen, O. Supplementation with Conjugated Linoleic Acid for 24 Months Is Well Tolerated by and Reduces Body Fat Mass in Healthy, Overweight Humans. The journal of nutrition. Elverum. Vol. 79. Num. 6. 2004a. p. 1118-1125.
-Gaullier, J. M.; Halse, J.; Hoye, K.; Kristiansen, K.; Fagertun, H.; Vik, H.; Gudmundsen, O. Conjugated linoleic acid supplementation for 1 y reduces body fat mass in overweight humans. American Journal of Clinical Nutrition. Elverum. Vol. 79. Num. 6. 2004b. p. 1118-1125.
-Gil, A. C. Como Elaborar Projetos de Pesquisa. São Paulo: Atlas; 1991.
-Graziola, F.; Solis, V. S.; Curi, R. Estrutura Química e Classificação dos Ácidos Graxos. IN Entendendo a gordura: os ácidos graxos. Curi R, Pompéia C, Miyasaka CK, Procopio J. São Paulo. Manole. 2002.
-Iwata, T.; Kamegai, T.; Sato, Y. S.; Ogawa, A.; Kasai, M.; Aoyama, T.; Kondo, K. Safety of Dietary Conjugated Linoleic Acid (CLA) in a 12-weeks Trial in Overweight Japanese Male Voluenteers. Journal of Oleo Science. Tokyo. Vol. 56. Num. 10. 2007. p. 517-525.
-Joseph, S. V.; Jacques, H.; Plourde, M.; Mitchell, P. L.; Mcleod, R.; Jones, P. J. H. Conjugated Linoleic Acid Supplementation for 8 Weeks Does Not Affect Body Composition, Lipid Profile, or Safety Biomarkers in Overweight, Hyperlipidemic Men. The Journal of Nutrition. Winnipeg. Vol. 141. Num. 7. 2011. p. 1286-1291.
-Kamphius, M. M. J. W.; Lejeune, M. P. G. M.; Saris,W. H. M.; Platenga, W. M. S. Effect of conjugated linoleic acid supplementation after weight loss on appetite and food intake in overweight subjects. European Journal of Clinical Nutrition. Hamburg. Vol. 57. Num. 10. 2003. p. 1268-1274.
-Lambert, E. V.; Goedecke, J. H.; Bluett, K.; Heggie, K.; Claasen, A.; Rae, D.; West, S.; Dugas, J.; Dugas, L.; Meltzer, S.; Charlton, K.; Mohede, I. Conjugated linoleic acid versus higholeic acid sunflower oil: effects on energy metabolism, glucose tolerance, blood lipids, appetite and body composition in regularly exercising individuals. British Journal of Nutrition. Cape Town. Vol. 97. Num. 5. 2007. p. 1001-1011.
-Larsen, T. M.; Toubro, S.; Gudmundsen, O.; Astrup, A. Conjugated linoleic acid supplementation for 1 y does not prevent weight or body fat regain. The American Journal of Clinical Nutrition. Copenhagen. Vol. 83. Num. 3. 2006. p. 606-612.
-Laso, N.; Brugue, E.; Vidal, J.; Ros, E.; Arnaiz, J. A.; Carne, X.; Vidal, S.; Mas, S.; Deulofeu, R.; Lafuente, A. Effects of milk supplementation with conjugated linoleic acid (isomers cis9,trans11 and trans10,cis12) on body composition and metabolic syndrome components. British Journal of Nutrition. Madrid. Vol. 98. Num. 4. 2007. p. 860-867.
-Laureles, L. R.; Rodriguez, F. M.; Reano, C. E.; Santos, G. A.; Laurena, A. C.; Mendoza, E. M. T. Variability in Fatty Acid and Triacylglycerol Composition of the Oil of Coconut (Cocos nucifera L.) Hybrids and Their Parentals. Journal of Food Chemistry. Zamboanga City. Vol. 50. Num. 6. p. 1581-1586. 2002.
-Leser, S.; Alves, L. A. Os lipídios no Exercício. IN Estratégia de Nutrição e Suplementação no Esporte. Biesek S, Alves LA, Guerra I. São Paulo. Manole. 2010.
-Norris, L. E.; Collene, A. L.; Asp, M. L.; Hsu, J. C.; Liu, L. F.; Richardson, J. R.; Li, D.; Bell, D.; Osei, K.; Jackson, R. D.; Belury, M. A. Comparison of dietary conjugated linoleic acid with safflower oil on body composition in obese postmenopausal women with type 2 diabetes mellitus. The American Journal of Clinical Nutrition. Columbus. Vol. 90. Num. 3. 2009. p. 468-476.
-Steck, S. E.; Chalecki, A. M.; Miller, P.; Conway, J.; Austin, G. L.; Hardin, J. W.; Albright, C. D.; Thuillier, P. Conjugated Linoleic Acid Supplementation for Twelve weeks Increases Lean Body Mass in Obese Humans. The journalof nutrition. Chapel Hill. Vol. 137. Num. 5. 2007. p. 1188-1193.
-Syvertsen, C.; Halse, J.; Hoivik, H. O.; Gaullier,J. M.; Nurminiemi, M.; Kristiansen, K.; Einerhand, A.; O’shea, M.; Gudmundsen, O. The effect of 6 months supplementation with conjugated linoleic acid on insulin resistance in overweight and obese. International Journal of Obesity. Oslo. Vol. 31. Num. 7. 2007. p. 1148-1154.
-Venkatramanan, S.; Joseph, S. V.; Chouinard, P. Y.; Jacques, H.; Farnworth, E.; Jones, P. J. H. Milk Enriched with Conjugated Linoleic Acid Fails to Alter Blood Lipids or Body Composition in Moderately Overweight, Borderline Hyperlipidemic Individuals. American College of Nutrition. Montreal. Vol. 29. Num. 2. 2010. p. 152-159.
-Yeilaghi, H.; Arzani, A.; Ghaderian, M.; Fotovat, R.; Feizi, M.; Pourdad, S. S. Effect of salinity on seed oil content and fatty acid composition of safflower (Carthamus tinctorius L.) genotypes. Jounal of Food Chemistry.Rodasht. Vol. 130. Num. 3. 2012. p. 618-625.
-Watras, A. C.; Buchholz, A. C.; Close, R. N.; Zhang, Z.; Schoeller, D. A. The role of conjugated linoleic acid in reducing body fat and preventing holiday weight gain. International Journal of Obesity. Wisconsin. Vol. 31. Num. 3. 2007. p. 481-487.
-Zaia, D. A. M. Os Lipídios e a Origem da vida. IN Entendendo a gordura: os ácidos graxos. Curi R, Pompéia C, Miyasaka CK, Procopio J. São Paulo. Manole. 2002.
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