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Although researchers can’t say for sure why diet soda sets the stage for weight gain, there are several possible reasons. “I discourage my patients from drinking diet sodas because while they have no calories, they are created to simulate the sweetness of a regular soda. This leaves the drinker’s taste buds completely overwhelmed. For an example of this, take a sip of water and then bite into your favorite fruit. Then try the same experiment with diet soda. Note that the real food tastes flat after drinking soda,” explains Dr. Deen. The distortion of taste may cause the diet soda drinker to seek higher calorie foods.

Another possibility is that people just eat more because they think they are saving calories from drinking a diet soda. A direct link between artificial sweeteners and a craving for high-calorie foods may exist. There is also the possibility that the link is related to unknown factors involving diet, exercise, or other personal characteristics.

Lastly, researchers believe that consuming high amounts of fructose (a type of sugar), artificial sweeteners, and sugar alcohols (another type of low-calorie sweetener) cause your gut bacteria to adapt in a way that interferes with your satiety signals and metabolism, according to a new paper in Obesity Reviews. (If you’ve noticed you’ve been feeling tired all the time and gaining weight, your metabolism may be slowing).

“An evolution of the gut flora to this new sweetener-rich environment has a potential to negatively impact our health,” says Amanda Payne, Ph.D.

How does that happen? As bacteria in the gut process food, they give off byproducts called short-chain fatty acids. These can be beneficial and serve as energy in the body. But as the sweetener-adapted bacteria thrive and become more efficient at processing large amounts of high-fructose corn syrup, artificial sweeteners, and sugar alcohols, they also produce more and more short-chain fatty acids. (Not to imply that sugar is any better than artificial sweeteners.

In those high amounts, Payne says, short-chain fatty acids decrease satiety signals.  ”This signaling may cause disruptions in our feeling full and hence prevent us from stopping to eat when we should,” Payne says.

As if overeating isn’t enough, the short-chain fatty acids also promote inflammation in the lining of the gut. Just how? Scientists aren’t yet sure. But they do know that inflammation damages gut tissue and results in leaky gut syndrome.

Diet Soda and Weight Loss: Caffeine’s Role

Although diet soda has fewer calories than regular soda, the caffeine content may be greater. According to the Center for Science in the Public Interest, a 12-ounce regular Coke contains 35 milligrams of caffeine and a Diet Coke contains 47 mg. At low levels, caffeine can stimulate energy, make you more alert, and may be beneficial for weight loss. In higher amounts it can cause nervousness, increased heart rate, and difficulty concentrating. You may also get withdrawal symptoms such as headache, irritability, or depression if you stop taking caffeine suddenly.

“Although caffeine can be helpful for weight loss, I recommend getting your caffeine from iced coffee. If you need to add sugar, add as little as possible for taste,” says Deen. “I advise my patients to drink water. For a healthy alternative to diet soda, try adding one-third cup of fruit juice to seltzer water for a low-calorie and not-too-sweet beverage.”

Although the exact relationship of diet soda to weight gain and metabolic syndrome is not clear, it is obvious that diet soda should not be considered a “healthy” alternative to regular soda. When you choose to drink any soda, you are choosing to drink a beverage that is just not as healthy for you as milk, juice, or water.

Diet Soda: It’s Not Just Making You Fat  was originally published on blackdoctor.org

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