Spinal muscular atrophy care has changed in ways few expected a decade ago. Disease-modifying therapies, newborn screening, and earlier treatment now mean many children with the condition live longer and achieve functional outcomes that were previously uncommon. These advances also bring new challenges, particularly around nutrition.
From comfort to strength
Stacey Tarrant, a dietitian at Boston Children’s Hospital’s SMA clinic, has worked there for 18 years. She recalls when families prioritized making meals easier rather than more nutritious. Before effective treatments became available, nutrition centered on comfort—reducing gastrointestinal pain, keeping food enjoyable, and sharing tube-feeding tips online.
“Families connected through social media to exchange strategies,” Tarrant said. “The focus was on quality of life, not nutritional value.”
The arrival of disease-modifying therapies altered this approach. These treatments preserve motor neurons, improve swallowing, and ease gastrointestinal problems. Nutrition now aims to build muscle, support growth, and enhance function.
No typical journey
There is no single path for SMA nutrition. Needs differ based on when treatment begins, how patients respond to drugs, and individual variations. Tarrant tailors diets to balance growth and weight, avoiding both undernutrition and excess weight, which can worsen fatigue and weakness.
Calorie requirements are often lower in SMA, so food quality matters more than quantity. She suggests nutrient-rich, minimally processed options. For patients with swallowing difficulties, she recommends commercial formulas made from blended whole foods to support gut health.
Change doesn’t happen overnight. Food is tied to culture, comfort, and family habits. “Encouraging dietary changes is a gradual process,” Tarrant said. “Progress comes in small steps.” Sometimes, advice given years earlier becomes relevant when families are finally ready—an unexpected benefit of long-term care.
The shift shows SMA treatment is no longer just about survival. It’s about helping children achieve their fullest potential. That requires rethinking old assumptions, including what “healthy” growth means.
While the field has advanced, challenges remain. Clinicians recognize that excess weight can limit strength gains, while undernutrition may hinder progress. Yet evidence on the best growth targets for children treated early is limited. Should BMI percentiles guide nutrition decisions? Or should body composition be the focus? Without clear answers, families and providers work through uncertainty.
Tarrant concentrates on finding solutions. Better data could establish evidence-based goals, helping maximize treatment benefits. For now, the work moves forward.
Efforts to refine care continue as families adapt to new possibilities.