What are the recommended diet and nutrition guidelines for a patient with multiple sclerosis (MS)?

Diet and Nutrition Recommendations for Multiple Sclerosis

All MS patients should receive early nutritional screening and dietary counseling by a multidisciplinary team to prevent malnutrition, with a focus on a diet lower in saturated fat and higher in polyunsaturated fatty acids from food sources. 1

Core Dietary Approach

Primary Dietary Pattern

• Adopt a diet low in saturated fat and high in polyunsaturated fatty acids (PUFAs) from food sources for potential disease prevention benefits, though evidence for disease modification remains limited 1
• Mediterranean and plant-based diets show the most consistent benefits, including reductions in fatigue, improved quality of life, and modulation of inflammatory markers 2, 3
• The Swank diet (low saturated fat, emphasizing plant-based fats with omega-3 fatty acids) has historical support but limited high-quality evidence 3, 4

What NOT to Recommend

• Do not recommend omega-3 fatty acid supplementation for MS prevention or treatment, as large trials (n=292) showed no significant differences in relapse frequency, duration, or severity compared to placebo 1
• Avoid recommending specific PUFA supplements, as a 2012 Cochrane review of 794 patients found no major effect on disease progression 1
• Ultra-processed foods and diets high in saturated fats should be avoided due to associations with increased inflammation and greater MS severity 2

Malnutrition Prevention and Management

Screening and Assessment

Implement routine nutritional screening using validated tools with input from patients and caregivers, as weight loss, malnutrition, and cachexia are well-recognized features of MS 1

Common causes of malnutrition in MS include:

• Dysphagia (most important cause) 1
• Reduced mobility and fatigue 1
• Physical difficulty eating or drinking 1
• Poor appetite, poor sight, reduced cognition 1

Multidisciplinary Team Approach

Early detection and treatment of malnutrition requires coordination between: 1

• Neurologist for disease management
• Nutritionist/dietitian for dietary planning
• Speech and language therapist for swallowing evaluation
• Physiotherapist for eating posture assessment
• Occupational therapist for adaptive equipment needs
• Nurse for comprehensive care coordination

Nutritional Interventions

Provide dietary counseling as first-line intervention for all MS patients with nutritional concerns 1

• Dietary advice alone or with oral nutritional supplements (ONS) may improve weight, body composition, and muscle functionality 1
• For patients unable to meet nutritional needs through food intake, consider oral nutritional supplements, which are cost-effective in community settings 1
• Prevention of malnutrition is vital as it compounds existing MS symptoms including muscle dysfunction, fatigue, and muscle spasms 1

Alternative Dietary Patterns: Insufficient Evidence

While several specific diets have been explored, insufficient evidence exists to routinely recommend any specific restrictive diet 5:

• Wahls diet and McDougall diet: Show promise but primarily supported by studies from their respective research groups, raising concerns about long-term adherence and nutritional adequacy 2, 3
• Ketogenic diet and intermittent fasting: Mixed findings with some benefits for fatigue and neuroprotection, but potential metabolic risks 2, 3
• Gluten-free diet: Lacks robust evidence with inconsistent findings 2, 3
• Most human trials have been small, non-blinded, and of short duration, limiting generalizability 5

Important Clinical Caveats

• No dietary pattern has been proven effective for reducing relapse rates or enhancing lesions in MS 3
• Some diets promoted for MS may have potential negative health consequences 5
• Inquire about dietary manipulations at each visit to educate patients on known efficacy data and potential adverse effects 5
• Refer patients undertaking restrictive diets to a registered dietician to ensure nutritional adequacy 5
• No evidence exists that medical nutrition therapy improves survival in MS patients, though this remains an important research gap 1

Practical Implementation

Focus counseling on:

• Reducing animal-based saturated fats 1
• Increasing plant-based polyunsaturated fatty acids from whole food sources 1
• Ensuring adequate caloric and protein intake to prevent malnutrition 1
• Addressing specific barriers to eating (dysphagia, mobility, fatigue) 1
• Monitoring for unintentional weight loss as a red flag for intervention 1