Source: Fox News
Summary
A two-year randomized trial found that diet drinks with sugar substitutes were as effective as water for weight loss in overweight or obese adults, according to the University of Liverpool. The study included 493 participants with a BMI between 27 and 35. Half drank 22.3 ounces of water daily, and the other half consumed diet beverages with non-nutritive sweeteners. After two years, both groups lost similar amounts of weight, with no significant differences in waist size, body fat, or cholesterol levels. A registered dietitian noted that the weight loss was likely due to a structured weight-management program, not the drinks themselves.
Our Reading
This guidance has been heard before.
Diet drinks and water both led to weight loss.
Studies keep rechecking the same questions.
Results often match expectations.
The same debates keep coming around.
Author: Evan Null
Study Overview
The study was conducted by the University of Liverpool and involved 493 participants aged 18 to 65 with a BMI between 27 and 35. The participants were split into two groups, with one group drinking 22.3 ounces of water daily and the other consuming diet beverages with non-nutritive sweeteners. The study lasted 104 weeks, or two years, and aimed to compare the effectiveness of water and diet drinks for weight loss.
Results and Observations
After two years, both groups lost significant amounts of weight, with the diet drink group losing about 10.6 pounds and the water group losing about 8.2 pounds. The study found no meaningful differences between the two groups in terms of weight loss, waist and hip measurements, or body fat reduction. Both groups also maintained their weight loss during the final year of the study without regular weight-management support.
Limitations and Context
The study had some limitations, including its single-location setting in England and the lack of race and ethnicity data. Only 220 of the original 493 participants completed the 104-week assessment, and the second-year extension was voluntary, which may have influenced the results. The study was funded by the American Beverage Association, though the association did not participate in the design, analysis, or interpretation of the results.
Expert Commentary
Alix Turoff, a registered dietitian not involved in the study, noted that the weight loss was likely due to the structured weight-management program, not the diet drinks themselves. She emphasized that diet beverages can be a useful substitution for sugar-sweetened drinks but are not a magical solution for weight loss. Turoff also pointed out that the study did not find significant differences in hunger or sugar intake between the two groups at the end of the trial.
Public Health Implications
The findings suggest that diet drinks with non-nutritive sweeteners can be as effective as water for weight loss when part of a structured program. However, the study did not show that these drinks have a unique metabolic effect. Turoff recommended water as the primary hydration choice but noted that diet drinks should not be feared for preventing fat loss or causing weight gain. The study highlights the ongoing debate around the role of artificial sweeteners in weight management and overall health.
