The active metabolite of Vitamin D (25(OH)D) functions via an intracellular receptor present across many bodily tissues with multiple physiological actions.
Vitamin D is important for bone health and Vitamin D deficiency may contribute to many other disorders (e.g., autoimmune, infectious, cancer, depression, chronic fatigue, neuro-degenerative disorders, diabetes and vascular disease). Multiple studies with adult epilepsy patients have demonstrated vitamin D deficiency; few reports are available for children.
A cross-sectional retrospective cohort study of 138 pediatric epileptic patients on anticonvulsants examined demographic data, seizure type, puberty status, physical activity, and duration and type of anti-seizure medication.
Vitamin D deficiency occurs in 23.2% and insufficiency 47.8% of epileptic children on anticonvulsants. Two risk factors – entering puberty and the use of non-enzyme inhibiting anti-seizure medication (e.g. clonazepam, gabapentin, etc.) are particularly associated with hypovitaminosis D. Regular monitoring of Vitamin D status in children on anticonvulsants is recommended.