In this video tutorial by Dr Suzann Wang you will learn how to prevent gastroesophageal reflux disease (GERD). It is a hyper or low acidity problem in the stomach. The ph factor measures the acidic or alkaline nature of anything and it has a range of 0 to 14; 14 being highly alkaline and 0 being highly acidic. The stomach acidity tends to be 2. 0 which is pretty acidic. The acidity should be 2. 40. If the acidity is lower, it affects the rest of the digestive system. You can rectify this by taking one tablespoon of apple cider vinegar with quarter cup of water before your meals for about a month. Then the stomach will get trained to attain the right acidic level that will help in digestion.