We all know that sugar-filled fizzy drinks can be a cause of weight gain, but did you know that the same might be true for the sugar free versions? Even low calorie, sugar free versions of fizzy drinks could be encouraging you to eat more. Scientists recently found that rats that drink diet or regular fizzy drinks would eat more and gain more weight than rats that were given water or regular degassed fizzy drinks. This is associated with an increased amount of the “hunger hormone” ghrelin in rats that have been drinking carbonated fizzy drinks. This increased level of ghrelin can also be seen in the human volunteers, where it acts on the brain to increase hunger.
So, if you’re trying to diet, diet coke could be the last thing you need!
Nice summary https://www.ncbi.nlm.nih.gov/pubmedhealth/behindtheheadlines/news/2017-05-15-can-fizzy-water-make-you-fat-/