Clinical studies and randomized controlled trials indicate that the ketogenic diet is generally safe and well-tolerated in infants and young children under the age of two, particularly when used to manage drug-resistant epilepsy under medical supervision.
The retrieved literature contains multiple studies specifically evaluating infants under two years of age (including infants under one year). Papers [1], [6], and [8] all explicitly report that the ketogenic diet is safe, feasible, and well-tolerated in infants and young children, providing an acceptable safety profile when properly monitored. No papers in the list refute this claim.