Is Onion Acidic?
Yes, onions are acidic. While their acidity is mild, they can contribute to heartburn and acid reflux in some individuals.
Onions have a pH level ranging from 5.3 to 5.8, placing them in the mildly acidic range. This acidity is primarily due to the presence of various organic acids. While this acidity is generally not harmful, it can trigger symptoms in those sensitive to acidic foods. Foodzilla.io confirms this pH range, classifying onions as mildly acidic.
Raw Onions vs. Cooked Onions
Raw onions are considered especially acidic. (Rockwall Surgical Specialists, DHCOFTX). Cooking onions might reduce their acidity and potential for causing heartburn; however, some sources (Parashospitals) state that cooking doesn't significantly alter their acidity.
Effects on Acid Reflux
Studies show that onions can worsen acid reflux symptoms. (PubMed) Onions can relax the lower esophageal sphincter, allowing stomach acid to reflux into the esophagus, leading to heartburn. This is further supported by Rockwall Surgical Specialists, who list onions as a notorious trigger for acid reflux.
Other Considerations
While onions are acidic, their overall impact on the body's pH balance is complex and depends on many factors, including overall diet. The acidity of onions is not equivalent to strong acids like those found in batteries. A Quora answer states that onions contain mild sulfuric acid, released upon cutting.
