High-fat diets are healthy as long as they're also very low in carbs (below 50 grams per day). These diets are then ketogenic, meaning they put the body in a state of ketosis. Being in ketosis while on a high-fat diet will have a completely different effect on your health and metabolism than simply increasing your fat intake.
For example, a low-carb and high-fat diet is more likely to lead to weight loss than low-calorie or low-carb diets whereas a high-fat diet is not . Studies have also documented that being in ketosis comes with a range of health benefits like improved neurological, heart, and metabolic health . Ketosis also has an anti-inflammatory effect which can help with cancer.
If you plan your keto diet carefully, you may also boost your intake of highly beneficial fats like omega-3 fatty acids and mono unsaturated fats. If you add medium-chain triglycerides (MCTs) to the mix, you'll further increase the health benefits of your high-fat diet .