Feeding problems are common in infants with infantile epileptic spasms syndrome who follow the ketogenic diet, and they are often missed. In a 20-year review of 40 infants at one center, 26% of babies judged safe to start the diet by mouth later aspirated or developed aspiration pneumonia. According to research reviewed by Gram, feeding evaluations are essential at the start and throughout treatment.
According to research reviewed by Gram, feeding problems are common but often overlooked in infants with infantile epileptic spasms syndrome, a rare seizure disorder. Many of these babies follow the ketogenic diet, a high-fat, low-carbohydrate diet used to control seizures. In a 20-year review of 40 infants treated at one center, about 30% already had a history of aspiration, which happens when food or liquid slips into the airway and lungs. Among babies judged safe to start the diet by mouth, 26% still aspirated or developed aspiration pneumonia, a lung infection, during treatment. The researchers conclude that careful swallowing evaluations at the start and throughout the diet are essential for keeping these babies safe.
Key Statistics
A 2026 retrospective review of 40 infants with infantile epileptic spasms syndrome at one center found that 30% already had aspiration recorded before starting the ketogenic diet.
In a 20-year single-center review published in 2026, 5 of 19 infants judged safe to start the ketogenic diet by mouth (26%) later experienced aspiration or aspiration pneumonia during treatment.
Of 40 infants reviewed, 31 (77.5%) were fed by mouth when the ketogenic diet began, and 12 of the 23 referred for feeding safety checks had a feeding concern identified.
The Quick Take
- What they studied: Whether babies with this seizure disorder have trouble eating and swallowing safely when they start the ketogenic diet and while they stay on it.
- Who participated: 40 infants with infantile epileptic spasms syndrome who started the ketogenic diet at one medical center between 2005 and 2025. Many already had feeding problems, and most were fed by mouth when the diet began.
- Key finding: Of 19 babies judged safe to start the diet by mouth, 5 (26%) later aspirated or developed aspiration pneumonia. Because the group was small, the likely true rate is wide, roughly 12% to 49%.
- What it means for you: Parents and caregivers may want to ask for a swallowing evaluation before the diet starts and again during treatment. Watch for coughing, choking, or fever during feeding and report them promptly. Because this was a single-center review, results may not apply to every child.
The Research Details
The researchers looked back at the medical records of infants with infantile epileptic spasms syndrome who started the ketogenic diet at their center between January 2005 and January 2025. This type of review uses existing records rather than assigning treatments to new patients.
The team gathered information such as each child’s age at diagnosis and at diet start, other health conditions, and results from clinical feeding checks and video X-ray swallow studies. They also noted whether the child had received hormone-based medicines, which can affect appetite, and how the child was fed before and during the diet.
Feeding problems were defined as aspiration, confirmed by a video swallow study or an occupational therapy feeding assessment, or not taking in enough food by mouth. This approach allowed the researchers to track how feeding problems appeared and changed over time.
Following infants over many years shows how feeding problems develop and change during treatment, not just at one moment. Looking at records from a real clinic also reflects how children are actually cared for, which helps doctors spot patterns that a short trial might miss.
The study followed children over two decades and used objective swallow tests, which strengthens its findings. However, it was a review of past records from one center, so it cannot prove that the diet caused the problems. The number of children was small, so the estimates are uncertain. Readers should treat these results as an early warning rather than a final answer.
What the Results Show
At the start of the diet, 12 of the 40 infants (30%) already had a record of aspiration, either in their chart or on a video swallow study. Nine had been fed through a feeding tube before starting the diet, showing that many of these babies began treatment with significant swallowing difficulties.
Of the 31 infants who were fed by mouth when the diet began (77.5%), 23 were referred for a feeding safety check. Twelve of those 23 had a feeding concern found on a clinical feeding assessment or video swallow study. Three of these showed aspiration without a protective cough, meaning their airway was not reliably guarded when food or liquid went down the wrong way.
Among the 19 babies judged safe to start the diet by mouth, 5 (26%) later experienced aspiration or aspiration pneumonia during treatment. The 95% confidence interval, which shows the range of likely true values, was 11.8% to 48.7%. This wide range reflects the small number of children studied.
Together, these results suggest that feeding problems are frequent, change over time, and are often missed. A child who passes a feeding check at the start of the diet may still develop problems later, which is why the researchers recommend ongoing evaluation.
Hormone-based treatments such as ACTH or oral steroids are often the first treatment for this condition. The researchers noted that these medicines may temporarily increase appetite and improve feeding skills. This means swallowing problems could be hidden while a child is on these medicines and may become more visible afterward. Timing of feeding checks relative to these medicines is therefore important.
The review also highlights that feeding evaluation is a team effort. Doctors, speech and occupational therapists, and families all play a role in spotting changes early.
Swallowing and feeding difficulties are widely recognized in children with complex neurological conditions, and the ketogenic diet is an established second-line option for infantile spasms. This review adds detail by showing that children judged safe at the start may still have problems later, and that hormone treatment may mask feeding issues. Larger studies would be needed to confirm how common these patterns are across different clinics.
This was a review of medical records from one center, so it depends on how thoroughly information was written down. The study cannot show cause and effect, and it cannot tell us how the diet compares with other treatments in terms of feeding safety. The number of children was small, which leads to wide uncertainty in the percentages. The review also covered 20 years, during which feeding and diet practices may have changed. Finally, the children were not randomly assigned to groups, so differences in their health could have influenced the results.
The Bottom Line
Research suggests that feeding evaluations should be part of care when a child with infantile spasms starts the ketogenic diet, and they should be repeated during treatment. Confidence in this recommendation is moderate, since the evidence comes from a single-center review. Confidence that feeding problems are common in this group is higher, because multiple measures pointed in the same direction. Families should discuss any coughing, choking, or breathing changes during meals with their care team.
Parents and caregivers of infants with infantile epileptic spasms syndrome who are considering or following the ketogenic diet should pay close attention. Doctors, dietitians, speech and occupational therapists, and nurses who work with these children may find the findings useful. Adults without this condition, or families of children on the diet for other reasons, should not apply these findings directly without speaking to a specialist.
Feeding checks are most useful at the start of the diet and at regular points afterward, often when hormone medicines are started, stopped, or changed. Families may notice changes in eating or swallowing within the first weeks, but problems can also appear months into treatment. Regular follow-up over the course of the diet is the most realistic way to catch changes early.
Frequently Asked Questions
Can the ketogenic diet cause choking or aspiration in babies with infantile spasms?
Research shows aspiration can occur during the diet, even in infants judged safe to start by mouth. In a 20-year review of 40 infants, 26% of those 19 babies later aspirated or developed aspiration pneumonia. Because swallowing can change during treatment, researchers recommend repeat feeding evaluations rather than a single check.
How do doctors check whether a baby can swallow safely?
Doctors may use a video fluoroscopic swallow study, which is an X-ray video of swallowing, or an occupational therapy feeding assessment. In one review, these tests found feeding concerns in 12 of 23 infants referred for safety evaluation, showing they can catch problems that might otherwise be missed.
Do steroid medicines affect feeding in infants with infantile spasms?
Hormone treatments such as ACTH or oral corticosteroids may briefly boost appetite and improve feeding skills. That temporary improvement can hide underlying swallowing problems. The research suggests checking feeding again when the medicine wears off or when the ketogenic diet begins.
Want to Apply This Research?
- Log each meal or feeding session with the time, the amount taken by mouth, and any coughing, choking, gagging, wet voice, or breathing changes during or within 30 minutes of eating. Track fluid intake daily to watch for patterns.
- Schedule a feeding evaluation before the diet begins and after any change in hormone medicine. Share the app log with the care team at each visit, and contact them promptly if coughing during meals or fever appears.
- Review the feeding log weekly with a caregiver or clinician and look for trends, such as increasing coughing or decreasing intake. Keep a running record of respiratory infections and fevers, and update the care team whenever a pattern emerges. Plan repeat swallow assessments at regular intervals rather than relying on a single early check.
This article summarizes a single-center retrospective review and is for general education only. It is not medical advice. The ketogenic diet is a specialized treatment that must be started and monitored by a qualified medical team, including a neurologist and dietitian. Never change your child’s diet, feeding method, or seizure medicines without consulting their doctor. If your child coughs, chokes, or has breathing changes or fever during feeding, seek medical care promptly.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.