1. To Lower Blood Sugar
Apple cider vinegar is claimed to help diabetics control their blood sugar levels.
Some studies have shown that consuming vinegar after a high-carb meal can improve insulin sensitivity by as much as 34% and reduce blood sugar levels significantly (1, 2, 3, 4, 5, 6, 7, 8, 9).
However, if you're on medication for diabetes, you should check with your doctor before taking apple cider vinegar.
2. To Help You Feel Full
Apple cider vinegar is sometimes recommended as a weight loss aid.
This is because it may help you feel full.
Some short-term studies have shown that consuming apple cider vinegar may help you eat fewer calories, lose weight and reduce belly fat (10, 11).
However, its long-term effects on weight loss are unknown and likely to be small unless other dietary and lifestyle changes are also made
To Lower the Risk of Cancer
It's often claimed that apple cider vinegar can help lower your risk of cancer.
In test-tube studies, vinegar has been shown to kill cancer cells (12, 13, 14, 15).
Some observational studies, which can't prove causation, have also linked consuming apple cider vinegar with a decreased risk of esophageal cancer. However, other studies have linked it with an increased risk of bladder cancer (16, 17).
Overall, there is insufficient evidence to make any claims regarding the effects of apple cider vinegar on the risk of cancer