Can preserved egg (pidan) help improve excessive stomach acid?
Generally speaking, preserved eggs (pi dan) can somewhat improve excessive stomach acid, but they should be consumed in moderation. The specific analysis is as follows:

Preserved eggs belong to the category of pickled foods and contain certain alkaline substances such as lime and soda ash. These substances can neutralize stomach acid and provide some relief for individuals suffering from excessive gastric acid. Therefore, moderate consumption of preserved eggs may help alleviate symptoms of excessive stomach acid. Additionally, preserved eggs contain various minerals such as calcium and magnesium, which aid in gastrointestinal digestion, enhance appetite, and further relieve discomfort caused by excessive stomach acid.
Preserved eggs contain significant amounts of sodium and lead due to the preparation process, and excessive intake may burden the kidneys and nervous system. Therefore, consumption of preserved eggs should be strictly controlled to avoid overconsumption.
In daily life, it is advisable to limit the intake of greasy and spicy foods, such as fatty meats and chili peppers, and to avoid both overeating and eating on an empty stomach. Maintaining regular eating habits and consuming more fresh vegetables and fruits are more beneficial for managing excessive gastric acid secretion.