# Nutrition in Sjögren's Syndrome
Fluid intake and fluid balance
In Sjögren's syndrome, adequate fluid intake may be important for supporting saliva and tear production, although the affected glands themselves cannot function normally.
ResearchediPositive results in clinical studies, not yet standard treatment
Studies investigate whether hydration affects symptoms, but direct fluid intake cannot reverse the autoimmune damage to glands.
Many people with Sjögren's find that regular, distributed fluid intake throughout the day feels more comfortable than large amounts at once. Water without added sugars or acids is generally most suitable; acidic drinks can accelerate tooth wear when saliva production is reduced.
Mediterranean diet
ResearchediPositive results in clinical studies, not yet standard treatment
Recent research suggests that a Mediterranean dietary pattern (rich in plant-based foods, olive oil, fish and minimally processed products) may be associated with milder symptoms in Sjögren's syndrome. A large study on prevention of autoimmune diseases showed possible beneficial effects of this pattern.
This dietary pattern contains many anti-inflammatory substances. However, it is not a specialist diet for this disease, but rather a general way of eating that is well tolerated and can be supportive alongside regular care. Personal tolerance varies widely.
Omega-3 fatty acids and dry eyes
ResearchediPositive results in clinical studies, not yet standard treatment
A recent systematic review of omega-3 polyunsaturated fatty acids (from fish, flaxseed, walnuts) shows that different forms of them can help with dry eyes from various causes. In Sjögren's, where dry eyes are an important symptom, researchers are investigating whether omega-3 can support the eye surface.
The evidence is not conclusive and the effect varies by form (EPA, DHA, and others) and by study. Omega-3 can sometimes also affect blood clotting; this is relevant if you are taking anticoagulants and should be discussed with your doctor.
Intermittent fasting
ExperimentaliOngoing in study setting, outcome still unknown
Studies in laboratory animals suggest that intermittent fasting (for example: eating within a limited part of the day) may reduce dry eyes in Sjögren's, possibly through changes in gut flora and bile acids. One small study also showed indications in salivary glands.
This is very early research. It is not known whether this works in humans, who it is suitable for, how long it should last, or whether it is safe if you are taking certain medications or are underweight. This should never be attempted without guidance from your doctor.
Micronutrients: selenium and other substances
ResearchediPositive results in clinical studies, not yet standard treatment
Selenium is sometimes investigated in relation to autoimmune diseases. A large study in thyroid autoimmune disease (Hashimoto's) showed no clear benefit from extra selenium without deficiency. For Sjögren's specifically, the evidence is much less.
ResearchediPositive results in clinical studies, not yet standard treatment
General research into nutrition and Sjögren's suggests that nutritional status (measured by nutritional scores) can be associated with more severe disease manifestations outside the salivary and tear glands.
Selenium supplementation without demonstrated deficiency is not routinely recommended. If blood tests show an actual deficiency, supplementation may be relevant, but this should be discussed with your doctor.
Malnutrition and insufficient intake of certain nutrients can worsen autoimmune disease. Regular nutritional screening can be useful, especially if you suspect you are eating less or avoiding certain food groups.
Gluten and food sensitivity
ResearchediPositive results in clinical studies, not yet standard treatment
Studies show that some people with Sjögren's report self-perceived sensitivity to gluten or other foods, without this always being celiac disease. However, this can also occur without a direct causal link to Sjögren's.
If you suspect that certain foods are worsening your symptoms, it can help to note this deliberately and discuss it with your doctor or dietitian. Independently excluding large food groups can actually lead to malnutrition.
Potassium and food choices
ResearchediPositive results in clinical studies, not yet standard treatment
Some studies suggest that potassium-rich food and gluten-free diets may be beneficial, but the evidence is limited and not aimed at specific questions such as "how much" or "for whom".
Potassium is important for heart and muscle function, and many foods (bananas, leafy greens, nuts) contain it naturally. Only if your kidney function is reduced or you take certain medications may potassium restriction be necessary — your doctor should determine this.
Bacterial diversity in the gut
ResearchediPositive results in clinical studies, not yet standard treatment
Research suggests that the microbiome (gut flora) is involved in the development and course of Sjögren. Diet strongly influences this microbiome. Foods with plenty of fiber (whole grains, vegetables, fruit, legumes) generally support a healthier and more diverse gut flora.
This is not a direct measure against Sjögren itself, but something that can support your overall health. Large, sudden dietary changes can actually disturb gut flora.
Diet and extra-glandular symptoms
ResearchediPositive results in clinical studies, not yet standard treatment
Nutritional status is linked to how severe symptoms outside the salivary and tear glands are (joint inflammation, organ disease). Malnutrition or specific deficiencies can worsen these symptoms.
Regular nutritional screening by a dietitian familiar with autoimmune diseases can help detect deficiencies and problems early. This is especially important if you suspect that you are not taking in enough, losing too much weight, or if your treatment has side effects on eating and drinking.
Dentition and food consistency
Reduced saliva production increases the risk of dental caries (cavities) and oral fungal infections. This directly affects what you can comfortably eat.
ResearchediPositive results in clinical studies, not yet standard treatment
Food with a lot of sugars accelerates tooth decay when there is little saliva; acidic drinks and foods can also damage tooth enamel.
It is common to adapt food to what you can eat and drink without pain or discomfort. Soft, moist foods without added acids or much sugar are generally more pleasant. Your dentist and dietitian can provide advice together here.
Drug interactions and diet
Many medicines used for Sjögren (such as immunosuppressants) have food interactions. Some work better on an empty stomach, others with food. Grapefruit and certain herbal teas can affect some medications. Your healthcare provider and pharmacist should discuss this with you for each medicine.
Supplements (including natural preparations) can also affect medications; full openness with your team is essential.
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_This information never replaces a doctor's judgment. Always discuss your dietary choices and any changes with your own healthcare provider and dietitian._