Gastroparesis is a condition where your stomach empties food into your small intestine too slowly, causing nausea, vomiting, and bloating. According to Gram Research analysis of a 2026 JAMA review analyzing 82.6 million patients, type 2 diabetes causes 51.7% of gastroparesis cases, and women are 2-4 times more likely to develop it than men. Treatment starts with eating small, soft meals and anti-nausea medications, with advanced procedures available for severe cases.
Gastroparesis is a condition where your stomach moves food too slowly into your small intestine, causing nausea, vomiting, and bloating. According to Gram Research analysis of a comprehensive 2026 JAMA review, about 22 people per 100,000 have this condition, and it’s twice as common in women as men. The most common cause is type 2 diabetes, accounting for over half of cases. Treatment ranges from dietary changes and medications to advanced procedures for severe cases. Understanding gastroparesis helps patients and doctors work together to manage symptoms and improve quality of life.
Key Statistics
A 2026 JAMA review analyzing 82.6 million US patients found that type 2 diabetes causes 51.7% of gastroparesis cases, making it the leading cause of this stomach-emptying disorder.
According to a 2018 US insurance database study cited in a 2026 JAMA review, gastroparesis affects approximately 21.5 per 100,000 people, with women being 2-4 times more likely to develop the condition than men.
A 2026 JAMA review found that postsurgical effects account for 15% of gastroparesis cases, medication-induced causes account for 11.8%, and idiopathic (unknown cause) cases represent 11.3% of diagnoses.
The 2022 American College of Gastroenterology guidelines define gastroparesis diagnosis as more than 10% gastric retention at 4 hours on a gastric emptying scintigraphy test, with severity classified as mild (10-15%), moderate (16-35%), or severe (>35%).
The Quick Take
- What they studied: How gastroparesis develops, who gets it, what causes it, and how doctors treat it
- Who participated: This review analyzed data from 82.6 million patients in US health insurance records and summarized findings from multiple medical studies and guidelines
- Key finding: Type 2 diabetes causes more than half of gastroparesis cases, and women are 2-4 times more likely to develop the condition than men
- What it means for you: If you have diabetes, nausea, or vomiting, ask your doctor about gastroparesis. Early diagnosis and treatment with diet changes or medication can significantly improve your symptoms and quality of life
The Research Details
This is a comprehensive review article published in JAMA that examines gastroparesis from multiple angles. The authors analyzed data from a large US insurance database covering 82.6 million patients to understand how common gastroparesis is and what causes it. They also reviewed current medical guidelines from the American College of Gastroenterology and American Gastroenterological Association to explain how doctors diagnose and treat the condition.
The review synthesizes information about gastroparesis causes, risk factors, diagnostic tests, and treatment options. The researchers looked at epidemiological studies (which track disease patterns in populations) to identify which groups are most affected and what underlying conditions lead to gastroparesis. They then organized treatment recommendations from major medical organizations into a practical framework for patients and doctors.
This type of review is valuable because it brings together scattered information from many sources into one comprehensive overview. Rather than conducting a new experiment, the authors carefully examined existing research and clinical guidelines to create a complete picture of gastroparesis.
Review articles like this are important because they help doctors and patients understand the full scope of a condition. By analyzing data from millions of patients, researchers can identify patterns about who gets gastroparesis and why. This information helps doctors recognize the condition earlier and choose the best treatment. The review also shows how treatment recommendations have evolved based on new evidence, which helps ensure patients receive current, evidence-based care.
This review was published in JAMA, one of the most respected medical journals in the world. The authors based their findings on large population studies (82.6 million patients) and official guidelines from major medical organizations. The review includes specific diagnostic criteria and treatment recommendations from 2022-2025 guidelines, showing the information is current. However, as a review article rather than a new research study, it summarizes existing knowledge rather than presenting brand-new discoveries. The findings are reliable because they’re based on established diagnostic tests and treatment protocols used by gastroenterologists across the United States.
What the Results Show
Gastroparesis affects approximately 22 out of every 100,000 people in the United States, making it a relatively uncommon but important condition. The condition is significantly more common in women than men, with women being 2-4 times more likely to develop it. This gender difference is important for doctors to remember when evaluating patients with stomach symptoms.
Type 2 diabetes is by far the leading cause of gastroparesis, responsible for more than half of all cases (51.7%). This happens because high blood sugar damages the nerves that control stomach muscle contractions. Surgery on the stomach or nearby organs accounts for 15% of cases, while medications cause 11.8% of cases. About 11.3% of gastroparesis cases have no identifiable cause (called idiopathic gastroparesis). Type 1 diabetes causes 5.7% of cases, and other conditions account for the remaining 4.5%.
The condition causes several uncomfortable symptoms including nausea, vomiting, feeling full quickly (early satiety), bloating, and abdominal pain. These symptoms occur because food stays in the stomach too long instead of moving normally into the small intestine. Doctors diagnose gastroparesis using a gastric emptying scintigraphy test, which uses a small amount of radioactive material to track how quickly food leaves the stomach. If more than 10% of food remains in the stomach after 4 hours, gastroparesis is confirmed.
Several other conditions increase gastroparesis risk, including Parkinson disease, low thyroid function (hypothyroidism), and connective tissue disorders like scleroderma. Certain viral infections, including norovirus, cytomegalovirus, Epstein-Barr virus, and SARS-CoV-2, can trigger gastroparesis. Some medications commonly used for other conditions actually worsen gastroparesis, including opioid pain medications, cannabis, anticholinergic drugs, and GLP-1 receptor agonists (used for diabetes and weight loss). Recognizing these medication effects is crucial because stopping or switching medications can sometimes resolve gastroparesis without additional treatment.
This 2026 review reflects the most current understanding of gastroparesis, incorporating the latest 2022 American College of Gastroenterology guidelines and 2025 American Gastroenterological Association guidelines. The review confirms findings from previous studies about the strong link between diabetes and gastroparesis while also highlighting the importance of medication-induced cases, which are increasingly recognized. The classification of gastroparesis severity (mild, moderate, severe) based on gastric retention percentages represents the current standard approach used by gastroenterologists worldwide.
This review summarizes existing research rather than conducting new experiments, so it’s limited by the quality of studies already published. The prevalence data comes from a 2018 insurance database, which may not capture all gastroparesis cases since some people may be undiagnosed or uninsured. The review focuses primarily on US data, so findings may not apply equally to other countries with different healthcare systems or populations. Additionally, while the review describes treatment options, it doesn’t provide detailed information about how well each treatment works for individual patients, as this varies considerably based on the underlying cause and severity.
The Bottom Line
If you have persistent nausea, vomiting, or early fullness after eating, ask your doctor about gastroparesis testing, especially if you have diabetes (strong evidence supports this connection). First-line treatment includes eating small, frequent meals with soft or blended foods that are low in fat and fiber, combined with anti-nausea medications (moderate evidence). If symptoms don’t improve, doctors may add prokinetic medications like metoclopramide or erythromycin that help the stomach contract (moderate evidence). For severe cases that don’t respond to medications, advanced procedures like G-POEM or gastric electrical stimulation may be considered (limited but growing evidence). If you take medications that can worsen gastroparesis (opioids, GLP-1 agonists, anticholinergics), discuss alternatives with your doctor.
People with type 2 or type 1 diabetes should be especially aware of gastroparesis symptoms since diabetes causes over half of cases. Women should know they’re at higher risk than men. Anyone who has had stomach surgery should watch for gastroparesis symptoms. People taking opioid pain medications, cannabis, or GLP-1 receptor agonists should discuss gastroparesis risk with their doctor. Those with Parkinson disease, scleroderma, or other connective tissue disorders should be alert to symptoms. People without these risk factors are less likely to develop gastroparesis but should still seek evaluation if they experience persistent nausea or vomiting.
Dietary changes and anti-nausea medications typically provide symptom relief within days to weeks. Prokinetic medications (which help stomach contractions) may take 1-2 weeks to show full effect. If medications don’t work, advanced procedures like G-POEM may be considered after several weeks or months of failed medical treatment. For people with diabetes-related gastroparesis, improving blood sugar control can help prevent worsening over time, though benefits may take weeks to months to become apparent. Most people see meaningful improvement within 4-8 weeks of starting appropriate treatment.
Frequently Asked Questions
What causes gastroparesis and who is most likely to get it?
Type 2 diabetes causes over half of gastroparesis cases. Women are 2-4 times more likely to develop it than men. Other causes include stomach surgery (15%), medications like opioids (11.8%), and unknown causes (11.3%). Parkinson disease, thyroid problems, and certain viral infections also increase risk.
How do doctors test for gastroparesis?
Doctors use a gastric emptying scintigraphy test, which tracks how quickly food leaves your stomach using a small amount of radioactive material. If more than 10% of food remains after 4 hours, gastroparesis is diagnosed. A breath test using carbon-13 spirulina is also FDA-approved for diagnosis.
What should I eat if I have gastroparesis?
Eat small, frequent meals (4-6 daily) with soft, blended, or finely chopped foods low in fat and fiber. Avoid large meals, high-fat foods, and foods with tough fibers. Liquid nutrition supplements may be needed for severe cases. Work with your doctor or dietitian to create a meal plan.
What medications treat gastroparesis?
First-line treatments include anti-nausea medications (5-HT3 antagonists, antihistamines) and prokinetics like metoclopramide or erythromycin that help stomach muscles contract. Avoid opioids, cannabis, anticholinergics, and GLP-1 agonists, which worsen gastroparesis. Severe cases may require advanced procedures like G-POEM or gastric electrical stimulation.
Can gastroparesis be cured or will I have it forever?
Gastroparesis severity varies by cause. Medication-induced cases may resolve by stopping the offending drug. Diabetes-related cases improve with better blood sugar control. Some cases improve with dietary changes and medications. Severe cases may require procedures. Work with your gastroenterologist to develop a long-term management plan tailored to your situation.
Want to Apply This Research?
- Log meals (type, portion size, fat content) and symptoms (nausea, vomiting, bloating, fullness) within 30 minutes of eating to identify trigger foods and track treatment effectiveness over time
- Switch to eating 4-6 small meals daily instead of 2-3 large meals, focusing on soft, blended, or finely chopped foods low in fat and fiber; use the app to set meal reminders and track portion sizes
- Create a weekly symptom score (0-10 scale) tracking overall nausea, vomiting frequency, and bloating; compare scores month-to-month to measure whether dietary changes, medications, or other treatments are working; share data with your doctor at appointments
This article summarizes medical research and should not replace professional medical advice. Gastroparesis diagnosis and treatment require evaluation by a qualified healthcare provider. If you experience persistent nausea, vomiting, or early fullness, consult your doctor for proper testing and diagnosis. Do not stop or change medications without medical guidance. This information is current as of 2026 but medical recommendations may evolve. Always discuss your individual symptoms, risk factors, and treatment options with your healthcare team.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.