Different studies and diets have already shown that Calcium may play an important role in weight loss. Studies have shown that higher dietary calcium intake (in food or with supplements) help lower your body weight when on a diet. But why does calcium have this effect and how does it work?

A new study sheds some light on this by investigating the relation between calcium, protein and effects on 24-h energy expenditure (EE) and substrate oxidation, fecal energy and fat excretion, and concentrations of substrates and hormones involved in energy metabolism and appetite. In other words does your body burn more energy and does it use fuel differently (fat, carbs and protein)?

3 groups were tested:

Low calcium and normal protein (LC/NP: 500 mg calcium, 15% of energy (E%) from protein)

High calcium and normal protein (HC/NP: 1800 mg calcium, 15E% protein)

High calcium and high protein (HC/HP: 1800 mg calcium, 23E% protein)

The results are interesting

The calcium intake had no effect on 24-h energy need and people burnt no extra fat. BUT fecal fat excretion increased approximately 2.5-fold for the HC/NP high calcium normal protein diet with the other diets (14.2 vs 6.0 and 5.9 grams/day). So a normal protein diet with more calcium will make fat disappear like “magic”.

The HC/NP diet also increased fecal energy excretion as compared with the LC/NP and the HC/HP diets (1045 vs 684 and 668 kJ/day). Simply taking in more calcium “burns” about 350 kJ (about 84 calories) without doing anything. The study reported no effects on blood cholesterol, free fatty acids, triacylglycerol, insulin, leptin, or thyroid hormones.

“A short-term increase in dietary calcium intake, together with a normal protein intake, increased fecal fat and energy excretion by approximately 350 kJ/day. This observation may contribute to explain why a high-calcium diet produces weight loss, and it suggests that an interaction with dietary protein level may be important.”

Stay Limy, get enough Calcium?

PMID: 15672116

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News date: 20050203 Posted by: StayLimy.com

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