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High calcium, high protein diet does not increase weight loss over high protein diet alone
Wednesday, February 16, 2005 2:06 pm Email this article
Numerous studies have found that people who eat more calcium tend to weigh less than people who eat less. However, a new study from Australia found that people lost just as much weight on a high protein, moderate calcium diet compared to those eating a high dairy protein, high calcium diet.
Subjects: 50 people, 25-64 years old, BMI 25-35
The study involved 20 men and 30 women, 25- to 64-years-old, with a body mass index (BMI) of 25 to 35 (overweight or obese).
Subjects were randomly assigned to eat one of two weight loss diets for three months followed by one month of a weight maintenance diet.
Diet #2: 2400 mg of calcium per day
The first diet was a high dairy protein, high calcium diet that contained 2,400 mg of calcium per day.
Diet #2: 500 mg of calcium per day
The second diet was a high mixed protein, moderate calcium diet that contained 500 mg of calcium per day.
Diet composition: 34% protein, 24% fat, 41% carbs
Both diets contained 34 percent protein, 41 percent carbohydrates and 24 percent fat.
Weight loss: 21.3 lbs
The average weight loss, regardless of the diet, was 21.3 pounds.
Fat loss: 18.3 lbs
The average fat loss, regardless of the diet, was 18.3 pounds.
Lean body loss: 3.5 lbs
The average loss of lean body mass was 3.5 pounds.
“Increased dietary calcium/dairy foods in an energy-restricted, [high-protein] diet does not affect weight loss or body composition,” the authors of the study concluded.
Bowen J, Noakes M, Clifton P. Effect of calcium and dairy foods in high protein, energy-restricted diets on weight loss and metabolic parameters in overweight adults. Int J Obes Relat Metab Disord. 2005 Feb 15, published early on-line.
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