Obesity is a physical state where the body mass index (BMI) is at or above 30. If this is the case, then you are obese. Obesity causes high cholesterol levels and can lead to many serious health conditions such as diabetes mellitus and cardiovascular disease. To avoid obesity, we need to eat a healthy diet consisting of low-fat whole grain foods as well as fruits and vegetables. Fat has 9 calories per gram, so cutting down on fat will help you lose weight without doing any work!
The "Fad" Weight Loss Diet is a type of low-carbohydrate diet which has its roots in ketogenic diets that restrict carbohydrates in order to increase fat burning capability by reducing resting metabolic rate. The Fad Diet restricts carbohydrates to no more than 20 grams per day, which is the equivalent of a small apple. This drastic reduction in carbohydrates forces the body to burn fat for fuel, which is known as Ketosis. Ketosis produces ketones, which can be used by the brain as fuel when other forms of glucose are not available. The ketone bodies acetoacetate and β-hydroxybutyrate can be converted into glucose through a process called gluconeogenesis.
The Fad Diet also encourages two days a week where you eat five hundred calories or less; this is known as a "fasting" diet. It is alright to eat as little as 500 calories on a fasting day. This diet requires you to drink only black coffee or tea, mineral water, and water. 
The Fad Diet began in 1963 when it was written by nutritionists recommending it to dieters. The main idea of the book is that carbohydrates are very bad for you and lead to weight gain, obesity, and many health issues. The book claims that by eating less than ninety grams of carbohydrate a day would be ideal for the body. It also states that exercising would not be needed while the person followed this diet plan.
The method that this diet follows originated in 1920 by a biochemist named Otto Warburg. This diet states that high sugar consumption contributes to cancer cells and therefore, should be avoided.
The Fad Diet recommends eating only two meals a day; breakfast and dinner. The fast day is broken up into two portions known as "mini-fasts," which are eaten within the same day. The first mini fast is from 12 to 6 p.m., during which you consume less than 500 calories and nothing else but water or mineral water. The second mini fast begins at your dinner time and continues until dinner time the next day, when you begin your normal diet.
The different types of ketogenic diet include:
1) low carb
2) medium carb
3) high carb
4) starvation diets
5) cyclic ketogenic diet (CKD).
A ketogenic diet is a low-carb, high fat and protein diet that helps to control blood glucose levels. A CKD diet is a cyclic ketogenic diet designed for type 2 diabetics. A starvation diet in humans is called an atypical, calorie restricted diet. Cyclic ketogenic diets in humans are also known as "electrolyzed diets". Electrolyzed diets are sometimes used to treat epilepsy in children.
High-carb diets (HCD) and starvation diets have both been linked to many health issues, from diabetes to inflammatory diseases like IBS. There is evidence that dietary carbohydrates are linked with an increased risk of cancer and cardiovascular disease. Many forms of diets which are high in protein or fat are known to cause cardiometabolic changes that may lead to obesity, type 2 diabetes and cardiovascular disease.
Critics say that side effects can include headaches, constipation, muscle loss and a feeling of weakness.
Some studies have proven that the Fad Diet leads to less weight gain, a healthier and more youthful appearance, more concentration, and better work performance in people who are suffering from severe body-weight issues. In addition to these benefits, this diet has a low "calories consumed" ratio. This means that you will be able to achieve fast results without impeding your body's ability to function effectively.
In a study done at the University of York and published in the journal "Epidemics", researchers compared the effects of a high carb diet with a low carb diet on both blood sugar control and health markers. This study was conducted on 46 subjects with type 2 diabetes, none of whom were on any medication. The results showed that although the high carb diet controlled blood sugar levels better than the low carb diet, there was no difference in health markers between the two diets.
The Fad Diet is low-risk and appears to be effective for anyone who wants to lose weight quickly with little effort. The success of this diet is demonstrated by the overwhelming number of reviews that praise the diet's effectiveness and specifically recommend it for people who want to lose weight quickly.