Apple cider vinegar starts with fermented apple juice. The process creates acetic acid, which gives the vinegar its sharp, sour bite. People use it to help with digestion and to support healthy blood sugar levels after meals.
A common method is to stir 1 to 2 tablespoons into a glass of water and drink it before or during a meal. You can also find powdered and capsule forms that skip the sour taste.
Undiluted vinegar can damage tooth enamel and irritate your throat, so always mix it with water first. The acetic acid may change how certain medicines work, including diuretics and insulin. Check with your doctor before adding it to your routine if you take prescription drugs.