Apple cider vinegar (ACV) is mainly used as a food ingredient and household product. Common uses include:
Cooking: salad dressings, marinades, sauces, and pickling.
Blood sugar: taking vinegar with a carbohydrate-containing meal may cause a small reduction in the post-meal blood-sugar rise in some people.
Weight management: evidence suggests any effect is small; it is not a proven weight-loss treatment.
Digestion: some people use it for indigestion or bloating, but evidence is limited.
Skin/hair: sometimes used in DIY treatments, but undiluted vinegar can cause skin irritation or burns.
Household cleaning: diluted ACV can be used for some cleaning purposes