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)

During the 3 days of the diet, balanced nutrition is lacking. Some of the foods that are recommended are high in salt and fat and would not be appropriate for people with certain medical problems like heart disease, high blood pressure, diabetes, or high cholesterol. You may not be getting enough vitamins, minerals, and fiber while you are on the diet. If you are taking medicine for your diabetes and want to try the 3-day diet, it's important to talk with your doctor first about how to adjust your medicine.

If you've seen the TV show, you get the idea: Six weeks of healthy food and regular exercise is celebrated as a great start to a weight-loss journey – as well as a way prevent or reverse various diseases. Fair enough. Experts determined that the Biggest Loser Diet is very likely to help you shed pounds, thanks to calorie restriction and exercise. To reap the other benefits of weight loss, however, you have to stick with it – something that's a lot harder for average Joes than for TV stars-in-the-making.
Lastly, consider how the diet plan can be incorporated into your lifestyle and whether it’s sustainable for you over the long-term. Most weight loss fails because of the dieter’s inability to maintain their commitment. Price, time requirements for meal planning and preparation, satisfaction and flexibility with your lifestyle are therefore essential to your success, no matter which diet plan you choose.
Most low-carb diets advocate replacing carbs with protein and fat, which could have some negative long-term effects on your health. If you do try a low-carb diet, you can reduce your risks and limit your intake of saturated and trans fats by choosing lean meats, fish and vegetarian sources of protein, low-fat dairy products, and eating plenty of leafy green and non-starchy vegetables.
For weight loss, you need to find the right balance of calories so that you lose at a rate of 1 to 2 pounds a week. Starvation diets that severely restrict caloric intake may help you lose weight faster, but you're losing water and muscle, not fat. Plus, when you eat too few calories, your body may hold onto fat as a means of protection against the starvation. This change in metabolism makes it even harder for you to lose the unwanted pounds.
The degree to which exercise aids weight loss is open to debate, but the benefits go way beyond burning calories. Exercise can increase your metabolism and improve your outlook—and it’s something you can benefit from right now. Go for a walk, stretch, move around and you’ll have more energy and motivation to tackle the other steps in your weight-loss program.
While 1,200 may be the right number for some, it can be super restrictive for others, says Jaclyn London, MS, RD, CDN, Nutrition Director at the Good Housekeeping Institute. Try basing your meals and snacks off this plan and double up on veggies at any opportunity — more fruit at snack time works too! You can also add an extra ounce or two of protein at all meals if you find yourself feeling hungry. The combo of fiber from produce and lean protein makes this an adaptable strategy that’ll help you lose weight safely — one meal (and snack) at a time!
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