There are basically three varieties of cider that have different affects on the stomach.
apple cider- cider and juice are roughly the same with the exception that one is filtered and the other isn’t. Apple juice has a p. H of about 3.5-4.0, making it mildly acidic. Introducing cider increases the acidity already present. For individuals with GERD (Gastroesophageal Reflux Disease) or who are prone to acid indigestion, ingesting even mildly acid beverages can trigger an episode of reflux.
Hard cider- a fermented beverage that contains alcohol.
Alcohol relaxes the lower esophageal sphincter (LES), allowing stomach contents to move back up into the esophagus and cause heartburn. The LES is a bundle of muscles at the low end of the esophagus, where it meets the stomach. When the LES is closed, it prevents acid and stomach contents from traveling backwards from the stomach. Alcohol also makes the esophagus more sensitive to stomach acid.
Apple cider vinegar- With all of the indigestion attributed to juiced apples, apple cider vinegar is a popular treatment to prevent heartburn.
Raw ACV is the only vinegar that is alkaline-forming to the body. Using apple cider vinegar to relieve acid reflux symptoms, comes with no guarantees it will work. It’s thought that this home remedy helps balance stomach p. H by neutralizing stomach acid. It’s generally accepted as safe to consume a small amount of apple cider vinegar. It should be diluted with water.
This answer originally appeared on this Quora question on Acid Reflux.