A new study published in Nutrition Research by a joint research team of the Federal University of S? o Paulo and Campinas State University in Brazil pointed out that they used uric acid level in saliva to predict the body fat rate of teenagers. The researchers collected saliva samples from 129 girls and 1 19 boys. The subjects ranged in age from 14 to 17. In addition to uric acid, they also measured the contents of several other substances, including cholesterol and vitamin D. At the same time, the subjects also received oral examinations to rule out oral diseases so as not to affect the test results. In the last remaining subjects, anthropometric evaluation was carried out, including height, weight, body fat percentage and skeletal muscle mass, and measured by bioelectrical impedance analyzer.

After fasting 12 hours, the researchers collected the saliva of the subjects, and then determined the levels of cholesterol, uric acid and other substances by HPLC. Finally, linear regression is used to measure and analyze the relationship between these data. The results showed that teenagers with high saliva uric acid level had higher body fat rate. Even those subjects who have no symptoms related to obesity and chronic diseases can detect excess fat in their bodies through this test. The researchers said that uric acid level in saliva is a good indicator to predict body fat rate, even among teenagers who are considered healthy. This may be the basis of accurate and non-invasive methods for monitoring diet health and realizing early detection of nutritional status changes.

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