Consequently, researchers have widely discredited the hCG diet, which involves using hCG injections, pellets, sprays, or drops, and consuming as few as 500 calories daily. The diet is problematic not only because there’s a lack of research on hCG supplements, but also because the calorie requirement is dangerously low, potentially leading to nutrient deficiencies, fatigue, hormone imbalances, blood clots, and other issues. Thus, most experts agree the hCG diet is not safe for anyone, the Mayo Clinic notes. (35)
The trick here is not only to avoid all obvious sources of carbohydrate (sweets, bread, spaghetti, rice, potatoes), but also to be careful with your protein intake. If you eat large amounts of meat, eggs and the like, the excess protein will be converted into glucose in your body. Large amounts of protein can also raise your insulin levels somewhat. This compromises optimal ketosis.
"Caffeine causes the body to rely more on fat for fuel during a workout, rather than glucose," Aceto says. "But the caffeine effect is lessened when you eat a high-carbohydrate meal with it." Drink 1-2 cups of black coffee within two hours of working out, and emphasize healthy fats and protein if you're drinking it with a meal or snack. Skip the cream and sugar (which add unwanted calories and fat), and avoid drinking coffee at other times of the day; doing so can desensitize you to the fat-burning effects of caffeine.
Because the diet isn’t as restrictive as a traditional vegan or vegetarian diet, it may be simpler to stick with — hence its No. 2 ranking in U.S. News & World Report’s Easiest Diets to Follow category. Because you’ll be eating meat some of the time, you may also be at a lower risk of the aforementioned nutrient deficiencies that vegetarians and vegans may face.
The two diet options that are currently available are the Flex Plan and the Core Plan. The Flex Plan is an updated version of the POINTS Food System in which the goal is to stay within your recommended amount of points each day. The POINTS value for foods is calculated based on the food's calories, fat, and fiber. Along with your weekly POINTS target you are also given a "Weekly Allowance" to use for indulging or special occasions.
Consuming too many starchy foods, such as potatoes, rice, pasta, and breads (especially at one sitting), provides your body with more than it needs for energy and glycogen stores; anything left over will be stored as fat. "You don't have to eliminate starchy carbs completely," says IFBB pro Mike Matarazzo. "But you should really cut back on them when trying to shed body fat." Limit total starch servings per day to 3-5, where a serving size is one cup of pasta, rice, or sliced potatoes.
The conclusion? A caloric deficit is the sole cause of fat loss. Even if those calories come from the shittiest sources known to mankind, fat will STILL be lost. It’s not the source or the quality of those foods and the calories they provide… it’s the total quantity of it all. (Additional details here: Is Sugar Bad For You? How Much Should You Eat A Day?)