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Whole Fat Milk Linked to Lower Weight Gain

Posted: Wednesday, January 10, 2007

Women who regularly consumed at least one serving of full-fat diary every day gained about 30 per cent less weight than women who didn’t, says a study from Sweden.

The study looks set to continue the debate about whether dairy foods can promote weight loss, and what the mechanism behind such an effect could be.

Lead author Magdalena Rosell and her colleagues from the Karolinska Institute in Stockholm looked at the intake of whole, sour, medium-and low-fat milk, as well as cheese and butter for 19,352 Swedish women aged between 40 to 55 at the start of the study.

They collected data on dietary intakes at the start of the study (1987–1990) and again at the end (1997). Average body mass index (BMI) of the women was 23.7 kg per sq m at baseline. The women were subsequently divided into one of four intake groups: a constant less than one daily serving; an increasing intake from less than one to at least one daily serving; a constant intake of at least one daily serving; and a decreasing intake from at least one daily serving to less than one.

The researchers report that a regular and constant intake of whole milk, sour milk and cheese was significantly and inversely associated with weight gain, while the other intake groups were not. A constant intake of at least one daily serving on whole and sour milk was associated with 15 per cent less weight gain, while cheese was associated with 30 per cent less weight gain, said Rosell.

“The association between the intake of dairy products and weight change differed according to type of dairy product and body mass status,” concluded the researchers.

Since no effect was observed for the medium- and low-fat dairy products this raises questions about the effect of calcium on the weight loss. Rosell suggested that conjugated linolenic acid (CLA) found in dairy could aid weight control, but stressed that insufficient evidence exists to support such a conclusion.

Dr. Michael Zemel from the University of Tennessee stated that dairy can help reduce body fat and that calcium only accounts for about 40 per cent of the effect.

Source: Diabetes In Control: American Journal of Clinical Nutrition:Volume 84, Number 6, Pages 1481-1488 ”Association between dairy food consumption and weight change over 9 y in 19 352 perimenopausal women” Authors: M. Rosell, N.N Hakansson and A. Wolk