Health Claims

Scientists are studying whether eating a very low-carb, high-fat diet (called keto) might affect brain diseases like Alzheimer's and Parkinson's. The early research looks promising, but doctors haven't proven yet if it actually helps people.

Correlational

The keto diet may help stop seizures by making the brain's calming signals stronger and balancing the chemicals that control brain activity.

Mechanistic

A special high-fat, low-carb diet called the ketogenic diet can help people with epilepsy who haven't responded to regular medicines. It works by changing how the brain uses energy, which helps reduce seizures.

Mechanistic

Following a ketogenic diet may lower blood sugar levels in adults, with research showing an average drop of 0.18 mmol/L compared to other diets.

Quantitative

When adults follow a ketogenic diet, they tend to lose weight - about 2.5 kg on average compared to other diets, according to research combining 27 studies.

Quantitative

Following a ketogenic (keto) diet—very low in carbs and high in fat—appears to lower the amount of fat called triglycerides in people's blood by about 0.2 units, according to research combining results from 27 different experiments.

Quantitative

Eating a ketogenic diet (very low carb, high fat) makes the 'bad' cholesterol called LDL go up in adults by about 0.35 mmol/L on average, according to 27 research studies.

Quantitative

Eating a keto diet (very low-carb, high-fat) seems to raise cholesterol levels in grown-ups by a small but measurable amount - about 0.36 units on average, according to 27 research studies.

Quantitative

Kids with epilepsy who try the classic keto diet often get some side effects like stomach problems or tiredness, but these usually go away or can be fixed easily. This means doctors can adjust the diet for each child to help them stick with it and control their seizures better.

Descriptive

A version of the keto diet that's less strict about fat (like a 2.5:1 ratio instead of the classic 4:1) might cause fewer side effects like constipation or high cholesterol, but it might also not work as well to prevent seizures.

Mechanistic

When kids with epilepsy go on the classic ketogenic diet, most of the side effects they might get can be handled or fixed, and most kids don't have to stop the diet because of really bad side effects.

Descriptive

When children with epilepsy follow a special high-fat diet called the ketogenic diet for more than 3 months, about 44% of them develop stomach problems like constipation, diarrhea, or nausea - these digestive issues are the most common long-term side effects.

Quantitative

About 1 in 4 kids with epilepsy who go on the classic keto diet develop brain-related side effects like headaches or dizziness within the first 3 months, which is the second most common problem they experience.

Quantitative

About half of kids with epilepsy who start the classic ketogenic diet get stomach problems like constipation, diarrhea, or nausea in the first 3 months, making it the most common side effect.

Quantitative

When healthy adults have high levels of a hormone called glucagon in their blood, it causes a change in the balance of two specific ketone bodies (beta-hydroxybutyrate and acetoacetate) during a fat infusion procedure.

Causal

When doctors raise a hormone called glucagon in healthy people's blood by giving them fatty acids, it doesn't change how much ketone (a chemical the liver makes) their bodies produce.

Mechanistic

When both fat and insulin levels are low, the liver makes very few ketones - this finding is from an abstract summary and full study details were not available

Descriptive

When healthy adults haven't eaten overnight and have low insulin levels, having higher levels of fatty acids in their blood (about double the normal amount) makes their liver produce more than twice as many ketone bodies - the molecules your body makes when breaking down fat for energy.

Quantitative

When insulin levels get really high in the blood (around 110 units), it strongly stops the liver from making ketone bodies (which the body makes when breaking down fats), cutting the production rate by more than half in healthy people.

Mechanistic

Growth hormone helps control how the body breaks down and uses energy from food, and it affects how well the body responds to insulin—especially in people who are obese.

Mechanistic

When obese men go without food for 3 days, their bodies make more growth hormone.

Descriptive

When obese men fast, blocking growth hormone makes insulin better at reducing fat-related molecules in their blood.

Mechanistic

When obese men fast for 3 days, blocking their growth hormone lowers the amount of sugar their bodies produce.

Causal

When men with obesity fast for 3 days while also blocking growth hormone, their bodies become better at using insulin again.

Causal