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Conjugated linoleic acid

This article was originally published in The Tan Sheet

Executive Summary

Ingredient's benefits questioned by USDA Agricultural Research Service researchers in July issue of Lipids. Single-blind study conducted in 1998 found CLA supplementation in 17 non-smoking, healthy women ages 20-41 does not build muscle, lower blood-fat or alter any of 12 immune response indices. Previous animal data suggested immune system, body fat, cardiovascular health benefits; Norwegian study found positive results in obese subjects (1"The Tan Sheet" Jan. 8, In Brief). USDA group suggests results could differ with greater consumption over time, different CLA mixture

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Conjugated linoleic acid reduces body fat in overweight or obese individuals, Henrietta Blankson, Scandinavian Clinical Research, Norway, et al., report in the December Journal of Nutrition. Results from a double-blind, randomized, placebo-controlled study of 60 overweight people found an average body fat reduction of six pounds in the CLA group compared to placebo. Subjects were divided into five groups receiving either placebo, 1.7 g, 3.4 g, 5.1 g or 6.8 g CLA per day for 12 weeks. Subjects receiving 3.4 g and 6.8 g CLA demonstrated highest levels of body fat reduction

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