Weight Loss with Systemic Sclerosis (Scleroderma) in South Africa

How Systemic Sclerosis Affects the Gut — and Weight

SSc causes fibrosis and smooth muscle atrophy throughout the GI tract, from mouth to anus. Each section of the gut can be affected differently:

The cumulative effect is that many SSc patients struggle to eat enough, absorb enough, or retain enough nutrients to maintain a healthy weight. Malnutrition in SSc is associated with worse outcomes — including increased pulmonary complications and mortality.

Oesophageal Involvement: Reflux and Dysphagia

GORD (gastro-oesophageal reflux disease) is almost universal in SSc, affecting 70–90% of patients. The lower oesophageal sphincter loses tone due to fibrosis, allowing acid and bile to reflux freely. Unlike ordinary GORD, SSc-related reflux is often severe, poorly responsive to standard proton pump inhibitor (PPI) doses, and carries a high risk of oesophageal stricture and Barrett's oesophagus.

Anti-Reflux Dietary Strategies

• Never eat lying down: Remain upright for at least 3 hours after eating. This is critical in SSc — gravity is your friend.
• Elevate the head of your bed: Use bed risers or a wedge pillow to raise the head by 20–30 cm. This is the single most effective non-pharmacological anti-reflux measure for sleeping.
• Small, frequent meals: 5–6 small meals per day rather than 3 large ones. A full stomach dramatically worsens reflux in SSc due to delayed emptying.
• Avoid reflux triggers: Fatty foods, chocolate, coffee, alcohol, citrus, tomato-based foods, mint, and spicy food all relax the lower oesophageal sphincter or increase acid production.
• Soft, moist textures: Dry, chunky food risks impaction in a dysmotile oesophagus. Chew thoroughly; moisten food with sauces, gravies, or water.
• Avoid eating within 3 hours of bedtime.

Gastroparesis: When the Stomach Won't Empty

SSc frequently causes gastroparesis (delayed gastric emptying) due to smooth muscle atrophy and autonomic nerve dysfunction. Food sits in the stomach far longer than normal, causing:

• Early satiety (feeling full after just a few bites)
• Nausea, especially after meals
• Bloating and upper abdominal discomfort
• Vomiting of undigested food hours after eating
• Very poor calorie intake due to inability to eat adequate volumes

Dietary Management of Gastroparesis

• Eat small amounts frequently: 6–8 very small meals/snacks per day. The stomach can handle small volumes much better than large meals.
• Low-fat meals: Fat significantly delays gastric emptying further. Reduce fat at mealtimes; use fat in small amounts spread through the day rather than in concentrated form.
• Low-fibre during acute phases: High-fibre foods form bezoars (solid masses) in the stomach when emptying is delayed. Reduce raw vegetables, whole grains, and high-fibre fruit during symptomatic periods.
• Liquid and semi-liquid calories: Liquids empty from the stomach faster than solids. Nutritious liquids — smoothies, fortified drinks, soups, yoghurt — are easier to tolerate. Complan or similar oral supplements (available at SA pharmacies) provide concentrated calories in small volumes.
• Chew thoroughly: Smaller food particles empty faster.

Small Intestinal Bacterial Overgrowth (SIBO) in SSc

Dysmotility of the small intestine allows gut bacteria to multiply far above normal levels in the small bowel — a condition called small intestinal bacterial overgrowth (SIBO). SIBO is present in approximately 40–60% of SSc patients and is a major driver of malnutrition through:

• Malabsorption of fat, fat-soluble vitamins (A, D, E, K), B12, and iron
• Chronic bloating, flatulence, and abdominal cramping
• Chronic diarrhoea and steatorrhoea (fatty stools)
• Weight loss despite adequate calorie intake (nutrients absorbed by bacteria, not the patient)

SIBO Management

SIBO in SSc is typically treated with rotating antibiotic courses (rifaximin is preferred; alternating metronidazole, ciprofloxacin, or amoxicillin-clavulanate are commonly used in SA public hospitals). Dietary management is adjunctive:

• Prokinetics: Medications that speed gut motility (domperidone, metoclopramide, erythromycin at low dose) reduce SIBO recurrence by preventing bacterial accumulation in a slow gut — prescribed by your gastroenterologist
• Low-FODMAP during symptomatic phases: Reducing fermentable carbohydrates (certain fruits, wheat, onions, legumes) can reduce bloating and diarrhoea during SIBO episodes — work with an ADSA dietitian for proper implementation
• Fat-soluble vitamin supplementation: SIBO impairs absorption of vitamins A, D, E, and K — your doctor should monitor levels and prescribe supplements as needed
• B12 injections: Oral B12 is unreliable when SIBO and gut dysmotility are both present; intramuscular B12 injections (available at any SA clinic) bypass gut absorption

Nutritional Deficiencies Common in SSc

Oral and Dental Considerations

SSc-related microstomia (reduced mouth opening due to facial skin fibrosis) and xerostomia (dry mouth, often associated with secondary Sjögren's syndrome) create additional barriers to eating. Practical strategies:

• Mouth exercises: Specific facial stretching exercises can help maintain oral aperture — ask your physiotherapist or occupational therapist
• Regular dental check-ups: Dry mouth dramatically increases decay risk; fluoride gels and careful hygiene are essential
• Cut food small: Pieces that fit through a smaller mouth opening
• Straws and modified utensils: Occupational therapy can advise on adaptive eating equipment
• Saliva substitutes: Biotène mouth spray (available at Dischem/Clicks) helps manage dry mouth

Calcinosis and Skin Ulcers: Nutritional Support

Calcinosis (calcium deposits in the skin and soft tissues) and digital ulcers are painful SSc complications that require adequate nutrition for healing:

• Protein 1.2–1.5 g/kg/day supports wound healing
• Zinc (from meat, legumes, seeds) is essential for tissue repair — check serum zinc if ulcers are slow to heal
• Vitamin C (citrus, peppers, guava) supports collagen synthesis and wound healing

When Oral Nutrition Is Not Enough: Enteral and Parenteral Support

In severe SSc with significant GI dysmotility and malnutrition (common in diffuse SSc with small intestinal involvement), oral nutrition alone may be insufficient. Options include:

• Oral nutritional supplements (ONS): Complan, Ensure, or equivalent — provide concentrated calories and protein in small volumes. Available at SA pharmacies.
• Nasogastric (NG) tube feeding: Short-term support during acute deterioration
• Jejunostomy tube feeding: When gastric emptying is very slow, bypassing the stomach directly to the jejunum (middle small intestine) improves tolerance
• Home parenteral nutrition (HPN): Intravenous nutrition bypassing the gut entirely — reserved for severe cases with near-total gut failure; available through specialist nutrition support teams at academic hospitals in SA (Groote Schuur, Tygerberg, SBAH, CHBAH)

Exercise and Physical Activity with SSc

Physical activity is beneficial in SSc — it helps maintain muscle mass, prevents deconditioning, improves microvascular circulation (relevant for Raynaud's), and supports mental wellbeing. Key adaptations:

• Warm up thoroughly: Raynaud's phenomenon causes painful vasospasm in the hands and feet in cold — warm the body before exercise, and exercise in warm environments
• Hand exercises: Range-of-motion exercises for hand joints help maintain dexterity despite skin fibrosis — physiotherapy or occupational therapy guidance essential
• Pulmonary function monitoring: If interstitial lung disease (ILD) is present (common in SSc), exercise tolerance may be limited by breathlessness — use pulse oximetry during exercise if available; stop if SpO2 drops below 92%
• Avoid cold water swimming: Triggers Raynaud's; heated pool preferred
• Gentle resistance training: Helps maintain muscle mass to offset malnutrition-related sarcopenia

Finding Support in South Africa

• SARAA (South African Rheumatology Association): saraa.org.za — find a specialist rheumatologist
• Scleroderma Foundation (international): scleroderma.org — educational resources, research updates
• ADSA (Association for Dietetics in South Africa): adsa.org.za — find an ADSA dietitian with expertise in GI conditions and malnutrition
• GESSA (Gastroenterology Society of South Africa): gessa.co.za — find a gastroenterologist for GI complications
• Academic hospital rheumatology clinics: All major academic hospitals have rheumatology units (Groote Schuur, SBAH, Tygerberg, Grey's, Charlotte Maxeke)

Summary: Key Takeaways

• In systemic sclerosis, the primary nutritional challenge is preventing unintentional weight loss and malnutrition — not managing weight gain
• GI involvement affects up to 90% of SSc patients: reflux, gastroparesis, SIBO, and malabsorption are the main culprits
• Anti-reflux measures are non-negotiable: remain upright after eating, elevate the bed head, eat small meals, avoid triggers
• Gastroparesis requires small, frequent, low-fat, low-fibre meals; liquid calories are better tolerated
• SIBO causes malabsorption of fat-soluble vitamins and B12 — rotating antibiotics plus prokinetics are the treatment; work with your gastroenterologist
• Monitor and supplement: vitamin D, B12, iron, calcium, vitamin K are commonly deficient
• If oral nutrition is insufficient, oral supplements (Ensure/Complan) and tube feeding options are available — do not wait until severely malnourished to escalate
• Seek SARAA-registered rheumatologist, GESSA gastroenterologist, and ADSA dietitian for the full care team you need