"Gastric juices" refers to the digestive fluids produced by our stomach that help break down food into smaller particles so our body can absorb and use the nutrients effectively. Full definition
This is necessary to counteract the high acidity of gastric juice arriving from the stomach, and allows intestinal and pancreatic enzymes to work effectively to digest your food. (virginiahopkinstestkits.com)
Well lemon juice does stimulate gastric juices, but this isn't a bad thing — it helps ensure that your breakfast is properly digested! (bodyunburdened.com)
This time is important to activate gastric juices, so when the food arrives on the stomach it is properly digested. (dogfoodselector.com)