Your last meal is usually to blame if there’s a bad taste lingering in your mouth — but it could also be a sign you’re sick.

Though high levels of fluoride in water or toothpaste may cause risks, this mineral is generally safe and even has the benefit of protecting against cavities.

Electric toothbrushes clean more effectively than manual ones, remove plaque better, and may lower the risk of gum disease. Learn their benefits and drawbacks.