Generally, as with AEDs, it is suggested that after
adhering to dietary therapy for a period of 2 years, the
treatment should slowly be tapered off. Many patients
who become seizure free whilst adhering to the diets
remain seizure free off the diet. This has been dem-onstrated in one study, which reported the risk of sei-zures recurring when stopping the diet at only 20%.
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It has been hypothesized that the dietary therapies
have a long-term, disease modifying effects, although
the observed phenomenon could just be explained by
the natural history of the seizure disorder