"Gastric secretions" refers to the fluids produced by the stomach that help with digestion. These fluids contain important substances, like acid and enzymes, which break down the food we eat. Full definition
Achlorhydria / eɪklɔːrˈhaɪdriə / or hypochlorhydria refers to states where the production of hydrochloric acid in gastric secretions of the stomach and other digestive organs is absent or low, respectively. (en.wikipedia.org)
When you drink it on its own, its presence in the stomach does not stimulate gastric secretion. (ziziadventures.com)
This developed most of the changes seen in human patients, including not just achlorhydria (a lack of or total absence of gastric secretions in the stomach), but also iron - deficiency anemia and other pathological changes that replicate the human clinical traits involved, through the presence of which the researchers were able to confirm the mutation as the primary one responsible for the development of gastric NETs. (sciencedaily.com)