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.

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.

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.

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.

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.

If you're an adult with mild type 2 diabetes, switching to a keto diet for 12 weeks might lower a fat in your blood linked to liver fat, more than a low-fat diet would.