The acidity in soda is bad news for your digestive system, eroding tooth enamel and worsening acid reflux. But diet sodas are especially treacherous for your gut—and the far-reaching bodily systems it affects. “Researchers are finding that artificial sweeteners may affect our healthy gut bacteria, which can affect everything from blood-sugar control to weight management to disease—how our immune system works and how our body responds to infection,” says Smith.
4. You’ll Have Stronger Bones
The caramel color in soda contains an artificially created phosphorus that can be bad for long-term bone health, says Smith. Phosphorous is a natural chemical found in foods like beans and grains, but the mutant variety found in dark soda is like a dinner guest who refuses to leave. “Basically, you’re taking something that exists in nature but making this hyper-absorbable form of it,” says Smith. “Your body doesn’t have the choice whether to absorb it or excrete it, so it can cause calcium to leach out of bones. It’s particularly bad for anybody with kidney disease,” she explains.