The effect of sugary beverage consumption on body mass index (BMI) is difficult to discern based on current research, claims a new meta-analysis of randomized controlled trials published in Obesity Reviews.Many studies have suggested a link between excessive consumption of nutritively-sweetened beverages (NSBs) and higher BMIs, but this latest research suggests that there may be a need for further randomized controlled trials (RCT) in overweight people in order to investigate whether the link between NSBs and obesity is causational. Randomized controlled trials are considered to be the most rigorous way to assess whether a cause and effect relationship exists between certain factors.
“The current evidence does not demonstrate conclusively that NSB consumption has uniquely contributed to obesity or that reducing NSB consumption will reduce BMI levels in general,” the authors wrote. “We recommend an adequately powered RCT with overweight persons, for whom there is suggestive evidence of an effect.”
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