Yogurt may help
"An isocaloric diet that incorporates yogurt promotes greater weight loss, according to the results of a 12-week trial published in the April issue of the International Journal of Obesity. The investigators speculate that the increased amount of calcium (Ca) and suppression of calcitriol make this diet more effective." Story at Medscape.
Int J Obes. 2005;29:388-390, 391-397 is the citation.