The Gastrin Test can provide important information for the diagnosis of gastrinomas. Gastrinomas are tumors that produce excess gastrin, leading to elevated levels in the blood. A significant increase in gastrin levels, especially during fasting, can be indicative of gastrinoma. However, additional tests, such as imaging studies (e.g., CT scans) and secretin stimulation tests, may be performed to confirm the presence of gastrinomas and establish the diagnosis definitively. The Gastrin Test serves as a crucial initial indicator, prompting further investigation.