Can the ketogenic diet be used in adults?
In general, the diet does not seem to be as effective in adults. Most studies have been restricted to children and a few adolescents. In these studies, people have pointed out that the diet does not seem to work as well in older children, and seems to work best in children aged 1-10 years. The reason is not clear, but some have felt that older adolescents and adults may not make or use ketones quite so well. There are currently no published adult studies.