Why the Keto Diet Stops Seizures: Scientists Reveal New Clues

A new scientific review explores why ketogenic diets can reduce seizures in people with epilepsy. These diets shift the brain's energy source from glucose to ketones. This change may stabilize neural activity, protect brain cells, and affect biological pathways linked to seizures.

The review, published in The Lancet Neurology, looks at how ketogenic diets influence the brain's metabolism. It also points out major gaps in current clinical research.

How Ketogenic Diets May Help

Researchers from the University of Colorado Anschutz and UT Southwestern Medical Center led the review. They found that ketogenic diets do more than just change what someone eats. The diet may help the brain use energy more effectively, reduce inflammation, and protect brain cells. This means the diet could change the brain's environment to make seizures less likely.

Anna Figueroa, a researcher at CU Anschutz, noted that doctors have seen these diets reduce seizures in patients who don't respond to medication. However, the evidence comes from many small studies. She added that while scientists understand more about how the diet works, few new treatments or large studies have come from these discoveries.

Figueroa worked with Charuta Joshi and Manisha Patel to analyze research from the past five years. They looked at how well ketogenic diets work and the biological reasons behind their benefits.

Ketogenic diets severely limit carbohydrates. This makes the brain switch from using glucose as its main fuel. Instead, the body produces ketones, which are an alternative energy source. This metabolic shift might give the brain a more stable energy supply. It can also calm overactive neurons and improve how the brain manages energy. These changes together may lower the chance of seizures.

Figueroa hopes the review will help people understand how these diets work. She also wants it to highlight areas where more research is needed and encourage new drug development that mimics the diet's effects. The authors believe these findings could lead to new treatments that offer the benefits of the diet without requiring strict long-term eating plans.

Gaps in Research and Treatment Timing

The review also points out a big gap in research: most studies on ketogenic diets for epilepsy focus on children. While some pediatric research has compared different ketogenic approaches, the number of studies is still small.

Even less evidence exists for adults. In the last five years, only one randomized study compared ketogenic diets with standard epilepsy care in adults. More research with larger adult groups is clearly needed.

The review also discusses how the body's ability to process fat can change over time. Adults might develop liver changes, sometimes linked to long-term anti-seizure medication. These changes can affect how well they tolerate or respond to ketogenic diets.

This might explain why starting the diet earlier, especially in childhood, often seems to work better. The authors suggest that ketogenic therapy could be more beneficial if introduced earlier in treatment.

While the review focuses on epilepsy, the biological processes described might apply to other brain conditions. Early research suggests that metabolism-based treatments, like ketogenic diets, could help some people with other neurological disorders.

Overall, the authors recommend considering ketogenic diets earlier. They also call for larger studies to evaluate long-term results and continued efforts to create therapies that copy the diet's effects but are easier for patients to follow.