Several comprehensive studies and meta-analyses have demonstrated that after a few months or even a year of a low carb diet versus a moderate/high carb diet, there are no significant differences in the amount of weight lost (2,3,4,5).  I will say, however, most of these diets are NOT keto and are simply lower carb (i.e. 20%).  Also, long-term effects (beyond 1 year) are not often studied due to budgetary constraints, so interpret results as you wish.
The Mediterranean diet is rooted in an abundance of fresh plant-based foods including fruits, vegetables, nuts, seeds, beans, and legumes, with olive oil being the primary source of monounsaturated fat. Fish and seafood follow as a primary source of protein with moderate amounts of poultry, dairy, and eggs to follow. Red meat and sugary treats should be consumed relatively rarely and in moderate portions.
The Mediterranean diet has long been recognized as one of the healthiest and most delicious ways to eat. The core concept behind this healthy diet is to eat like the people who live in the Mediterranean region—fill your plate with fresh fruits and vegetables, healthy fats, whole grains, legumes and fish and enjoy moderate amounts of red wine. This 7-day Mediterranean meal plan features these good-for-you foods and delicious flavors for a week of healthy of eating. Plus, at 1,200 calories you're on track to lose a healthy 1 to 2 pounds per week.
Epilepsy is one of the most common neurological disorders after stroke,[7] and affects at least 50 million people worldwide.[8] It is diagnosed in a person having recurrent unprovoked seizures. These occur when cortical neurons fire excessively, hypersynchronously, or both, leading to temporary disruption of normal brain function. This might affect, for example, the muscles, the senses, consciousness, or a combination. A seizure can be focal (confined to one part of the brain) or generalised (spread widely throughout the brain and leading to a loss of consciousness). Epilepsy may occur for a variety of reasons; some forms have been classified into epileptic syndromes, most of which begin in childhood. Epilepsy is considered refractory (not yielding to treatment) when two or three anticonvulsant drugs have failed to control it. About 60% of patients will achieve control of their epilepsy with the first drug they use, whereas about 30% do not achieve control with drugs. When drugs fail, other options include epilepsy surgery, vagus nerve stimulation and the ketogenic diet.[7]
On the ketogenic diet, carbohydrates are restricted and so cannot provide for all the metabolic needs of the body. Instead, fatty acids are used as the major source of fuel. These are used through fatty-acid oxidation in the cell's mitochondria (the energy-producing parts of the cell). Humans can convert some amino acids into glucose by a process called gluconeogenesis, but cannot do this by using fatty acids.[56] Since amino acids are needed to make proteins, which are essential for growth and repair of body tissues, these cannot be used only to produce glucose. This could pose a problem for the brain, since it is normally fuelled solely by glucose, and most fatty acids do not cross the blood–brain barrier. However, the liver can use long-chain fatty acids to synthesise the three ketone bodies β-hydroxybutyrate, acetoacetate and acetone. These ketone bodies enter the brain and partially substitute for blood glucose as a source of energy.[55]

That's certainly the case with the ketogenic diet—a very low-carb meal plan—based on the findings of two recently published studies.1,2  Dr. Saslow and her team report that the individuals with type 2 diabetes who followed the keto diet lost significantly more weight than those on the low-fat diet espoused by the American Diabetic Association.1 These dieters also were able to get their hemoglobin A1c (HbA1c) below 6.5%, suggesting that some may have reversed their type 2 diabetes.1
The benefits above are the most common ones. But there are others that are potentially even more surprising and – at least for some people – life changing. Did you know that a keto diet can help treat high blood pressure, may result in less acne, may help control migraine, might help with certain mental health issues and could have a few other potential benefits?