Low Carbohydrate Diets: Ketosis occurs, and this presents the same problems as fasting. Once glycogen stores are spent (which happens quickly with athletes and those who exercise regularly), glucose must be made from protein sources, and there is greater wear on the kidneys as a result. Even on a high protein diet, some protein will be taken from body tissues in order to produce enough energy for the nervous system and regular activity. The onset of ketosis is an indication that this process has begun and it is not a positive aspect, regardless of what pro-high-fat authorities indicate.
Great weight loss on a low-carb diet is evident because of the fact that carbs hold water in the muscles at a ratio of 1:3. As carb intake decreases then so, too, does water retention. Much water flushes as a result of lack of glycogen to hold water molecules. Moreover, by increasing protein intake, excess nitrogen flushes with even more water since the kidneys use water to dilute the concentration of nitrogen. Once leaving a low-carb diet and the muscles refill with glycogen, fluid concentrations increase and the dieter regains some of the weight.
Low calorie diets of 400-600 kcalories that consist primarily of protein have the same problems as fasting and low-carbohydrate diets: proteins are used for energy and weight loss comes largely from water. Low-cal diets must be supervised properly by a medical professional and only as a last resort for those who cannot seem to lose weight by other methods. However, even those individuals tend to regain most of their weight back once they return to a balanced diet.
Beverly Hills Diet – a diet consisting of grapefruit, eggs, rice, and kelp; it is deficient in minerals and vitamins.
Cambridge Diet – a very low kcalorie (300-600 kcal/day); protein/carb mixture with mineral imbalances; the dieter is close to fasting.
Complete Scarsdale Diet – this diet is unbalanced nutritionally; some days are calorically restricted; the dieter alters portions of carbohydrate, protein, and fat; the diet consists of low carbs (20-50 g/day), and high fat and protein; the diet has a high meat (saturated fat and cholesterol) content.
Dr. Atkin’s Diet Revolution – this diet is unbalanced nutritionally; some days are calorically restricted; the dieter alters portions of carbohydrate, protein, and fat; carbs are very low (20-50 g/day), whereas fat and protein are high; there is high meat (saturated fat and cholesterol) consumption.
Dr. Linn’s Last Chance Diet – this diet has a very low kcalorie intake (300-600 kcal/day); it consists of a protein/carb mixture with a mineral imbalance; the dieter is close to fasting.
Dr. Reuben’s The Save Your Life Diet – this is a calorically dilute diet consisting of high fiber (30-35g/day); the diet is low in fat and animal products; there is poor absorption of minerals because of too much high fiber.
"Fake" Mayo Diet – this diet consists of grapefruits, eggs, rice, and kelp; it is deficient in minerals and vitamins.
F-Plan Diet – this is a calorically dilute diet consisting of high fiber (30-35g/day); it is low in fat and animal products; there is poor absorption of minerals because of too much fiber.
LA Costa Spa Diet – this diet promotes weight loss of 1-1_ lbs/day; there are various plans of 800, 1000, and 1200 kcal/day composed of 25% protein, 30% fat (mostly polyunsaturates), and 45% carbohydrate; the diets includes the four food groups.
Medifast Diet – this diet is balanced nutritionally, but provides only 900 kcal/day; use of liquid formulas makes this diet monotonous and expensive.
Nutrimed Diet/Medifast Diet – this is a nutritionally balanced diet, but it supplies only 900 kcal/day; the use of liquid formulas makes this diet monotonous and expensive.
Optifast Diet – this diet is nutritionally balanced, but supplies only 900 kcal/day; use of liquid formulas makes this diet monotonous and expensive.
Pritikin Permanent Weight-Loss Diet – this is a nutritionally unbalanced diet; some days are calorically restricted; the dieter alters portions of carbohydrate, protein, and fat; the diet consists of high protein (100 g/day); unless the foods properly chosen, it may be low in vitamin B12.
Prudent Diet – this is a balanced, low kcalorie (2400 kcal/day) diet for men; it is low in cholesterol and saturated fats; a maximum of 20-35% calories are derived from fat with an emphasis on protein, carbohydrates, and salt; there is ample consumption of fish and shellfish, and saturated fats are substituted with polyunsaturated fats.
Quick Weight Loss Diet – this diet is unbalanced nutritionally; some days are calorically restricted; the dieter alters portions of carbohydrate, protein, and fat, although there is low carbs (20-50 g/day), and high fat and protein; there is high meat consumption (saturated fat and cholesterol) with this diet.
San Francisco Diet – this diet begins at 500 kcal/day, consisting of two meals per day of one fruit, one vegetable, one slice of bread, and two meat exchanges; the second week limits carbohydrates, with most food coming from the meat group and with some eggs and cheese, and a few vegetables; week three includes fruit; in week four there is an increase in vegetables; week five the dieter add fat-containing foods (e.g., nuts, avocados); week six includes milk; week seven includes pastas and bread, where the diet is maintained at about 1300 kcal/day; this diet avoids the issue of saturated fats and cholesterol.
Slendernow Diet – this diet is unbalanced nutritionally; some days are calorically restricted; the dieter alters portions of carbohydrate, protein, and fat; the protein is generally high (100 g/day); unless foods are properly chosen, there may be a deficiency in vitamin B12.
Weight-Watchers Diet – this diet is balanced nutritionally, at about 1000-1200 kcal; use of high nutrient-dense foods are consumed; economic and palatable food makes it one of the most successful diets with no real health risks.
Wine Diet – this diet is about 1200 kcal/day, containing 28 menus together with a glass of dry table wine at dinner; besides the medicinal components of wine, it is believed that individuals reduce portion sizes when wine is consumed with a meal; the diet is low in cholesterol and saturated fats; there is a focus on fish, poultry, and veal with moderate amounts of red meat.
Yogurt Diet – this diet consists of two versions, being 900-1000 kcal/day, and 1200-1500 kcal/day; plain low-fat yogurt is the main dairy dish, consumed at breakfast, lunch, and as a bedtime snack; the diet is high in protein, and it is low in cholesterol, saturated fat, and refined carbohydrates
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