The consumption of citric acid can enhance appetite and normal metabolism of the body, and has an improvement effect on indigestion. Citric acid is a food additive, especially in beverages and jams, which not only makes the taste better, but also has the effect of preserving freshness. There are many people who suffer from indigestion and are not able to digest food properly after ingestion, so these people can add citric acid to their diet to help improve it. Citric acid can promote the secretion of gastric juice after ingestion, and the gastric juice can digest the food in the stomach faster after secretion, so it can improve the effect of indigestion, and also increase appetite. When using citric acid, try to avoid the use of chemical synthetic preparations, but should choose natural citric acid. Its natural citric acid does not contain chemical components and will not affect human health.