Carbonated Beverages
Carbonated beverages, including sodas and sparkling drinks, contain carbon dioxide, which, when consumed, can bloat up your stomach with gas. This bloating leads to discomfort and increased pressure on the stomach lining for individuals with gastritis. Furthermore, these beverages often contain high amounts of sugar or artificial sweeteners, which can irritate the stomach lining and lead to inflammation.
References:
[1] http://www.europeanreview.org/wp/wp-content/uploads/4742-4749-The-role-of-diet-on-gut-microbiota-composition.pdf
[2] https://academic.oup.com/jn/article/135/3/562/4663700?ijkey=e283adce55818d31b6299ffcf115fcfb5c261e3f&keytype2=tf_ipsecsha