High-fat diet that controls seizures is safe over long term, study suggests

The beneficial effect of a “ketogenic” high-fat diet on epilepsy is a wonderful example of how food and diet can be used to control a severe condition.

ScienceDaily (Feb. 17, 2010) — Current and former patients treated with the high-fat ketogenic diet to control multiple, daily and severe seizures can be reassured by the news that not only is the diet effective, but it also appears to have no long-lasting side effects, say scientists at Johns Hopkins Children’s Center.

A study report supporting their conclusion, and believed to be one of the first analyses of the long-term safety and efficacy of the diet, appears online in the February edition of the journal Epilepsia.

The ketogenic diet, consisting of high-fat foods and very few carbohydrates, is believed to trigger biochemical changes that eliminate seizure-causing short circuits in the brain’s signaling system. Used as first-line therapy for infantile spasms and in children whose seizures cannot be controlled with drugs, the diet is highly effective but complicated and sometimes difficult to maintain. It can temporarily raise cholesterol, impair growth and, in rare cases, lead to kidney stones, among other side effects.

“Despite its temporary side effects, we have always suspected that the ketogenic diet is relatively safe long term, and we now have proof,” says senior investigator Eric Kossoff, M.D., a pediatric neurologist and director of the ketogenic diet program at Hopkins Children’s. “Our study should help put to rest some of the nagging doubts about the long-term safety of the ketogenic diet,” he adds.

The evidence is based on a study of 101 patients ages 2 to 26 years treated with the ketogenic diet for a minimum of 16 months and for up to eight years at Hopkins Children’s between 1993 and 2008. At the time of the follow-up, patients were off the diet anywhere between eight months and 14 years. Nearly 80 percent of the patients remained either seizure-free or had their seizures reduced by half. Most patients’ seizures did not worsen even years after stopping the diet…

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High-fat ketogenic diet to control seizures is safe over long term, study suggests.

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