Fireside Chat: Nutrition and IgG4-RD
Watch the Full Webinar and Download the Summary.
Original air date: January 31, 2025
Welcome to our overview of the Nutrition and IgG4-RD Fireside Chat. We encourage you to watch the full webinar video, where we discuss essential nutritional insights, practical recommendations and actionable steps.
For a quick reference or easy follow-along, you can also read and download the PDF version of this information. We hope these resources will be valuable to everyone in the IgG4-RD community.
1. Pancreatic Involvement
One of the most significant organ manifestations of IgG4-related disease is pancreatic involvement. Pancreatic inflammation can lead to two main issues:
Autoimmune Pancreatitis (AIP)
A type of chronic pancreatitis often treated with steroids (e.g., prednisone).
Symptoms can mimic those of pancreatic cancer, leading to misdiagnosis and even unnecessary surgery in some cases.
Monitoring for relapse is important, as AIP can recur even after initial treatment.
Exocrine Pancreatic Insufficiency (EPI)
The pancreas fails to produce enough digestive enzymes to break down food. This means that the person is unable to take in sufficient calories and absorb nutrients. Substantial unwanted (and unhealthy) weight loss can result.
Key Signs & Symptoms:
Unintentional Weight Loss: Despite eating normally, patients may lose weight due to poor nutrient absorption
Steatorrhea: Oily, foul-smelling, or hard-to-flush stools, indicating fat malabsorption
Micronutrient Deficiencies: Possible low levels of fat-soluble vitamins (A, D, E, K), and minerals (zinc, iron, etc.)
Diagnosis
A stool test called fecal pancreatic elastase can help confirm EPI.
Sometimes a “trial” of oral pancreatic enzymes (PERT) is used to see if symptoms improve
Management:
Pancreatic Enzyme Replacement Therapy (PERT): Capsules taken with meals or snacks to aid digestion
Balanced Diet: Not all patients need a strict low-fat diet; only limit excessive fat if it consistently triggers GI symptoms
Smaller, More Frequent Meals: Easier on digestion and helps maintain stable calorie intake
Micronutrient Monitoring: Check vitamin A, D, E, K levels, plus iron, B12, and folate; supplement if needed
Endocrine Dysfunction (Diabetes)
Caused by pancreatic damage or long-term steroid use
Tips: Monitor blood sugar (HbA1c), coordinate with an endocrinologist
Remember: Each patient’s situation is unique. Work closely with your healthcare team (gastroenterologist, dietitian, endocrinologist) to tailor these recommendations to your specific needs. For more detailed information on pancreatic involvement and how it fits into IgG4-related disease, be sure to watch our Fireside Chat video.
Kidney Involvement
Key Points:
Manage blood pressure and diabetes to protect kidneys
Protein Intake: Aim for 0.8–1.0 g/kg/day
Sodium intake: best to limit to less than 2, 000mg of sodium (salt) a day when advanced kidney disease is present
Patients with advanced kidney disease may need to limit phosphorus/potassium
Consult a nephrologist and registered dietitian for individualized guidance
Salivary Gland Involvement
Dry Mouth Tips:
Add sauces or gravies to moisten foods to facilitate chewing and swallowing
Drink fluids while eating
Use sugar-free candies or lozenges to stimulate saliva
Smoothies and protein shakes can help maintain weight if solid foods are tough to chew
Normal saliva production is essential for good oral health. Patients with inadequate saliva from major salivary glands may face higher chances of tooth decay. It's recommended to visit the dentist regularly, ideally every six months
Common Nutrition Myths
Myth: A single supplement will cure IgG4-related disease.
Reality: Supplements can address deficiencies but won’t cure the disease.
Myth: Alkaline foods - the opposite of acidic foods, are better for one’s health.
Reality: The body’s pH (a measurement of the level of acidity present) is regulated very tightly and will not change substantially despite consuming ”alkaline” foods.
Frequently Asked Questions (FAQ)
Not necessarily. While very high-fat meals can trigger steatorrhea or discomfort in some patients, many people with IgG4-related pancreatic disease manage normal fat intake successfully by using pancreatic enzyme replacement therapy (PERT). Talk to your doctor or dietitian about your specific needs.
Common signs include unexplained weight loss, greasy or oily stools (steatorrhea) and possible vitamin/mineral deficiencies (especially fat-soluble vitamins like A, D, E, and K). If you notice these symptoms, ask your doctor about testing or a trial of PERT.
Steroids like prednisone can raise blood sugar levels and potentially lead to steroid-induced diabetes. If you’re on long-term steroids, monitor your glucose (e.g., via HbA1c testing) and consider consulting an endocrinologist for optimal management.
High-calorie, high-protein shakes (e.g., Ensure, Boost) can be helpful if you’re struggling to maintain your weight. They should supplement—not replace—balanced meals. If you have EPI, be sure to take your enzymes with these shakes for better nutrient absorption.
Not always. Although IgG4-related disease can affect the kidneys, many patients never experience kidney involvement. If your kidneys are impacted, controlling blood pressure and diabetes (if present) is key. A moderate-protein, low-sodium diet may also help.
Avoid unpasteurized dairy due to higher risk of bacterial infection. Fermented foods (e.g., kimchi, sauerkraut) can often be safe if you practice good food handling and aren’t severely immunosuppressed. Always check with your healthcare team for personalized advice.
Dry mouth can occur if IgG4- affects the salivary glands. Tips include using sauces or gravies, sipping liquids during meals and using sugar-free lozenges. High-calorie smoothies are also a good option if solid foods are difficult to chew.
Many patients do well with a balanced diet, but if you have ongoing malabsorption (e.g., EPI) or specific deficiencies (iron, B12, vitamins A/D/E/K), you may need supplements. Your doctor can run labs to check levels. Only take high-dose supplements if recommended after testing.
No single food or supplement can cure IgG4-related disease. Some foods have anti-inflammatory properties (e.g., colorful fruits/vegetables, omega-3 rich fish), but they complement—rather than replace—medical treatments like steroids or immunotherapy.
We recommend consulting with your healthcare team as well as a nutritionist knowledgeable about IgG4-RD. For more in-depth information, watch our full Fireside Chat video.
Additional Resources
Download a PDF Summary of this Fireside Chat
Disclaimer: This content is for informational purposes, not professional medical advice. Please consult with your healthcare team for personalized medical advice.
