Nutrition for rheumatoid arthritis

Nutrition for Rheumatoid Arthritis

Rheumatoid arthritis (RA) is one of the most common diseases of the musculoskeletal and connective tissue. Learn what causes it and how dietary changes can help alleviate discomfort.

What is Rheumatoid Arthritis?

RA is a chronic systemic autoimmune inflammatory disease of connective tissue, primarily affecting the joints. Symptoms include pain, stiffness, and swelling, and it can have systemic manifestations.

• RA is characterized by symmetrical polyarthritis, usually of the small joints of the hands and feet.

• Without treatment, persistent inflammation damages cartilage, causes joint deformities, and can lead to permanent disability.

Pathophysiology:

• RA begins in the synovium, the membrane surrounding the joint.

• The synovial fluid lubricates the joint and provides nutrients and oxygen to the cartilage.

• Cartilage is primarily made of collagen, a structural protein that supports joints.

Inflammation in RA:

• Chronic inflammation gradually destroys collagen, reducing joint space and eventually damaging bone.

• Accumulation of fluid and inflammatory cells in the synovium forms pannus, a thickened tissue that produces enzymes that further destroy cartilage and attract more inflammatory cells.

• RA affects not only cartilage and bones but can also damage organs elsewhere in the body.

Causes of Rheumatoid Arthritis

The exact cause is unknown. Likely triggers include:

• Abnormal autoimmune response

• Genetic predisposition

• Viral or bacterial infections

Epidemiology:

• RA affects about 1–2% of adults in Europe and the U.S.

• Women are 2–3 times more likely to develop RA, although the gender gap diminishes after reproductive age.

• Most patients are 35–55 years old.

• Life expectancy may be reduced by 4 years in women and 7 years in men with severe RA.

• Main causes of death: cardiovascular events, malignancies, infections

Symptoms of Rheumatoid Arthritis

RA symptoms vary widely. Characteristic features include:

• Morning stiffness lasting at least 30 minutes

• Fatigue, weakness, reduced appetite

• Painful, stiff joints

Pattern of joint involvement:

• Begins in metacarpophalangeal (MCP) and proximal interphalangeal (PIP) joints

• Joints affected symmetrically; painful, swollen, spindle-shaped

• Disease course alternates between remission and exacerbation

Forms of RA:

1. Early RA: Symptoms <1 year; early treatment may halt progression

2. Established RA: Signs of joint damage present

Complications:

• Anemia

• Nerve involvement

• Risk of scleritis and inflammation of blood vessels in the eye

Treatment of Rheumatoid Arthritis

Treatment involves medication and lifestyle changes:

• Medications aim to reduce inflammation, prevent joint damage, and preserve mobility

• NSAIDs (non-steroidal anti-inflammatory drugs) reduce inflammation and relieve pain

• Long-term therapy may involve disease-modifying drugs (DMARDs) and biologics

Nutrition for Rheumatoid Arthritis

Principles:

• Focus on a healthy, balanced diet

• Emphasize fruits, vegetables, and whole grains

• Increase fish intake; reduce meat consumption

• Replace animal fats with plant-based fats

Benefits:

• Helps maintain healthy body weight

• Improves general health

• May reduce risk of atherosclerosis, to which RA patients are particularly prone

Mediterranean Diet:

• Based on olive oil, oily fish, bitter vegetables, and a glass of red wine

• Moderate consumption of meat, dairy, and complex carbs

• Oleic acid in olive oil lowers cholesterol

• Olive oil contains bioactive phenols, including oleocanthal, which has anti-inflammatory effects comparable to ibuprofen

• Omega-3 fatty acids (PUFAs) reduce joint pain, stiffness, and tenderness

Other dietary approaches:

• Vegetarian or gluten-free diets may help some patients

• Allergen-free diets (eliminating dairy, soy, nuts, eggs, wheat, certain fish/shellfish, sesame, yeast) can be beneficial

Vitamin D and Sunlight:

• Sun exposure enhances vitamin D synthesis, crucial for calcium metabolism and immune modulation

• Recommended vitamin D3 dose: 1000–2000 IU/day

• Typical diet provides only ~200 IU/day

Cod liver oil:

• Rich in vitamin D and omega-3 fatty acids

• Study: 60 patients over 12 weeks consumed 10 g/day cod liver oil → reduced medication use by 30%, with no side effects

Salt intake:

• High salt intake may increase autoimmune activity in RA

• Combined with smoking, high salt doubles the risk of developing RA

Recommended Foods

• Algae, pineapple, cod, Swiss chard, broccoli

• Chicory, melon, grapes, strawberries, chestnuts, kiwi

• Nettle, cruciferous vegetables, apricot, olive oil, oily fish

• Leek, rosemary, figs, soy milk, dried fruits, asparagus, cherries, spices, grains

Foods to Avoid:

• Red meat, canned products, corn, corn oil

• Milk, cheese, wheat

• Processed meats, sunflower oil, rapeseed oil

Sample RA Menu

Breakfast: Low-fat milk, 1 tsp honey, oatmeal, glass of natural fruit juice
Snack: Fruit or fermented dairy
Lunch: Rice with tomatoes, radicchio salad, barley bread, canned peaches
Dinner: Tuna, boiled Swiss chard salad, rye bread, glass of red wine

Conclusion

RA is a serious chronic inflammatory disease of connective tissue.

• Most commonly affects small joints of hands, wrists, shoulders, knees, and ankles

• Immune system attacks cartilage, bone, and sometimes internal organs

Management:

• Early treatment and lifestyle adjustments allow long, high-quality life

• Effective therapies can slow disease progression and prevent disability

• Recommendations include:

  • Regular physical activity

  • Weight management

  • Healthy diet

  • Warm/cold therapy depending on disease stage

  • Relaxation techniques

  • Medication adherence

References:

1. Štimac D., Krznarić Ž., Vranešić Bender D., Obrovac Glišić M.: Dijetoterapija i klinička prehrana. Medicinska naklada, Zagreb 2014.

2. Cod liver oil and RA

3. Rheumatoid Arthritis Overview

4. Pliva Zdravlje RA

5. RA and Nutrition

6. High salt intake, smoking, and RA