Cons: Teaching your body to burn fat instead of carbs takes time, so you have to be patient while you feel sluggish during the weeks it takes to become fat-adapted. And not every body burns fat as efficiently as carbs, so your endurance may never measure up (though, as we said before, others actually see an improvement here.) Without carbs, your body’s ability to generate explosive energy will most likely decline, so if you love sprinting or HIIT, you might need to consume more carbs than other low-fat dieters. And while you’ll probably lose body fat, this kind of diet is actually keeping you focused on the wrong macro: Studies have proven that the higher protein aspect of a low-carb diet helps promote weight loss, rather than the lower carb count.
The Mediterranean diet is most famous for its benefit to heart health, decreasing the risk of heart disease by, in part, lowering levels of “bad” LDL cholesterol, and reducing mortality from cardiovascular conditions. It’s also been credited with a lower likelihood of certain cancers, like breast cancer, as well as conditions like Parkinson’s disease and Alzheimer’s disease. (1)
One study from 2005 followed 22 people with Type 1 Diabetes for 12 months. The difference here however is they consumed 70-90 grams of carbohydrates per day versus the restrictive less than 20 grams per day on the Ketogenic Diet. Remember my motto? Moderation is the key! The results were positive; less hypoglycemia, insulin requirements were reduced and their A1c dropped from 7.5% to 6.4%.
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 HMR Program uses meal replacements – think low-calorie shakes, meals, nutrition bars and hot cereal – in phases, coaching from experts, physical activity and an emphasis on fruits and vegetables to help dieters shed pounds fast. While last year the diet shared the No. 1 ranking in this category with the Biggest Loser diet, this year it has the top spot to itself. "This diet makes it easy to lose weight fast and would likely be effective for someone who wants to lose weight for a specific event," one expert said. "However, as far as long-term healthy-habit-forming, this diet falls short" in part because dieters don't learn to make their own healthy food choices.
In this meta-analysis, the researchers looked at the results from a total of 20 randomized controlled trials with more than 3,000 subjects, most of whom had type 2 diabetes.  Although the authors concluded that low-carbohydrate, low-GI, Mediterranean, and high-protein diets should all be considered as a dietary strategy for diabetes management, the low-carb diet proved itself as being superior in 6 of the 8 studies.
^ Freeman JM, Vining EP, Pillas DJ, Pyzik PL, Casey JC, Kelly LM. The efficacy of the ketogenic diet—1998: a prospective evaluation of intervention in 150 children. Pediatrics. 1998 Dec;102(6):1358–63. doi:10.1542/peds.102.6.1358. PMID 9832569. https://web.archive.org/web/20040629224858/http://www.hopkinsmedicine.org/press/1998/DECEMBER/981207.HTM Lay summary]—JHMI Office of Communications and Public Affairs. Updated 7 December 1998. Cited 6 March 2008.
On day 1, have a cup of plain low-fat Greek yogurt for breakfast, topped with 1/2 cup of blueberries and an ounce of chopped walnuts. The yogurt gives you calcium and satisfying protein, while the berries are full of antioxidants that protect you against cellular damage, and the nuts supply heart-healthy omega-3 fats. Have yogurt on day 4, too, but try pomegranate seeds and chopped pistachios -- or sliced oranges and chopped almonds.
Speaking of flavonoids, the waist-whittling compounds also exist in higher concentrations in red fruits such as watermelon, Pink Lady apples, and plums, meaning they also have the power to induce weight loss. In fact, a 2016 study in the journal BMJ found that people who eat a diet rich in flavonoid-heavy food tend to gain less weight, which could be promising seeing as many people tend to put on pounds as they age. In addition, anthocyanin, a specific flavonoid compound that gives red fruits their color, has been shown to reduce fat-storage genes.
Control Your Environments. Another simple strategy to help cut calories is to control your environment -- everything from stocking your kitchen with lots of healthy options to choosing the right restaurants. That means avoiding the temptation by staying away from all-you-can-eat restaurants. And when it comes to parties, "eat a healthy snack before so you won't be starving, and be selective when you fill your plate at the buffet," suggests Ward. Before going back for more food, wait at least 15 minutes and have a big glass of water.
Type I diabetes is usually inherited and type I diabetics usually have to inject insulin to maintain proper levels of blood glucose. The other 90% to 95% of people with diabetes are type II diabetics.  In this version, the body doesn’t produce enough insulin for proper function or cells in the body do not react to insulin and take in sugar from the blood.
The original therapeutic diet for paediatric epilepsy provides just enough protein for body growth and repair, and sufficient calories[Note 1] to maintain the correct weight for age and height. The classic therapeutic ketogenic diet was developed for treatment of paediatric epilepsy in the 1920s and was widely used into the next decade, but its popularity waned with the introduction of effective anticonvulsant medications. This classic ketogenic diet contains a 4:1 ratio by weight of fat to combined protein and carbohydrate. This is achieved by excluding high-carbohydrate foods such as starchy fruits and vegetables, bread, pasta, grains and sugar, while increasing the consumption of foods high in fat such as nuts, cream, and butter. Most dietary fat is made of molecules called long-chain triglycerides (LCTs). However, medium-chain triglycerides (MCTs)—made from fatty acids with shorter carbon chains than LCTs—are more ketogenic. A variant of the classic diet known as the MCT ketogenic diet uses a form of coconut oil, which is rich in MCTs, to provide around half the calories. As less overall fat is needed in this variant of the diet, a greater proportion of carbohydrate and protein can be consumed, allowing a greater variety of food choices.
“During physiological ketosis ketonemia reaches maximum levels of 7/8 mmol/L with no change in pH while in uncontrolled diabetic ketoacidosis it can exceed 20 mmol/L with a concomitant lowering of blood pH. Blood levels of ketone bodies in healthy people do not exceed 8 mmol/L precisely because the central nervous system (CNS) efficiently uses these molecules for energy in place of glucose,” researchers summarize.
Insulin is a hormone that lets your body use or store sugar as fuel. Ketogenic diets make you burn through this fuel quickly, so you don’t need to store it. This means your body needs -- and makes -- less insulin. Those lower levels may help protect you against some kinds of cancer or even slow the growth of cancer cells. More research is needed on this, though.
Shortly after World War II, Ancel Keys and colleagues (including Paul Dudley White, later President Eisenhower’s heart doctor) organized the remarkable Seven Countries Study to examine the hypothesis that Mediterranean-eating patterns contributed directly to improved health outcomes. This long-running study examined the health of almost thirteen thousand middle-aged men in the United States, Japan, Italy, Greece, the Netherlands, Finland, and then-Yugoslavia.