Comparison of the efficacy of popular weight loss programs in sedentary overweight women IV: bone, protein & liver status
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abstract
126 sedentary women (4412 yr, 44.85% body fat, 35.46 kg/m2) were randomized to participate in a nonexercise and no diet control group (C) or the Curves Complete 90day Challenge (CC), Weight Watchers Points Plus (WW), Jenny Craig (JC), or Nutrisystem Advance Select (NS) weight loss programs for 12wks. Fasting blood samples were obtained at 0, 4, 8, and 12 wks and analyzed by MANOVA. No significant interactions were observed among control and diet groups in bone mineral area (p=0.79), bone mineral content (p=0.41), bone mineral density (p=0.39), serum calcium (p=0.60), alkaline phosphate (p=0.39), total protein (p=0.22), blood urea nitrogen (p=0.41), creatinine (p=0.20), BUN/Creatinine ratio (p=0.31), aspartate aminotransaminase (p=0.51), alanine aminotransaminase (p=0.37), total bilirubin (p=0.41), albumin (p=0.30), globulin (p=0.18), or albumin/globulin ratio (p=0.65). Changes in these bone markers did not significantly correlate to changes in protein status or liver function. Results indicate that participation in these popular diets does not negatively affect bone status, markers of protein, or liver function. Supported by Curves International (Waco, TX)
