Research on Calcium Intake and Weight Gain in Adolescent Girls

The Importance of Addressing Childhood Obesity

The rising prevalence of overweight and obesity among children and adolescents has become a significant health concern, now classified as an epidemic. This issue is alarming because excess weight in childhood often carries into adulthood, leading to various health complications such as high blood pressure, heart disease, and certain cancers. Consequently, numerous campaigns have been launched to reduce childhood obesity, yielding mixed results.

Calcium’s Proposed Role in Obesity Prevention

Recent theories have suggested that calcium might play a role in combating obesity by regulating fat cells and reducing the amount of fat absorbed in the intestines. In light of this, a new study aimed to investigate whether increasing calcium intake in overweight adolescent girls could help reduce body fat and weight gain compared to girls with lower calcium intake.

Study Overview

Published in the American Journal of Clinical Nutrition, the study involved 274 girls aged 13 and 14 over a span of one year. Participants were selected based on a daily calcium intake of 600 mg or less and a BMI that fell between the 50th and 98th percentiles. Baseline assessments measured BMI, weight, height, and fat deposition. These metrics were reassessed at the 6- and 12-month marks. Additionally, participants reported their daily calcium intake and usual physical activity every three months.

Study Design and Results

The girls were divided into two groups. The first group was instructed to increase their daily calcium intake to 1200 mg or more by consuming milk and low-fat yogurt, while the second group maintained their normal diet of 600 mg of calcium or less. The results revealed that increasing calcium intake did not contribute to a decrease in body fat or weight gain. In fact, the percentage of body fat in both groups increased over the year, with no significant difference in weight gain observed between the two groups.

Conclusions and Implications

These findings challenge previous theories that proposed calcium as a potential method for addressing obesity in children and adolescents. While increasing calcium intake may not be effective in curbing obesity rates, it is essential to recognize the importance of calcium consumption during adolescence, a critical period for bone development and strengthening.

Author Information

Written By: Sonia Parmar, BSc