The hCG diet was created by Dr. A.T.W. Simeons as a treatment for obesity, rather than just a way to lose weight. According to Dr. Simeons, daily injections of human chorionic gonadotropin work to reprogram your hypothalamus, changing the way your metabolism processes food. The daily injections are accompanied by a very strict diet of 500 calories per day, and success can only be had by strict adherence to the program. The program is so fully planned that even your fluid intake must meet the required levels. Do this program only under your doctor's supervision.
Dr. Simeons allows dieters to drink only water, coffee, tea or mineral water for the duration of the 500-calorie diet phase. You must drink at least two liters of fluid per day. You're free to drink all water if you wish, or you may drink a combination of any of the allowed beverages. In fact, unlimited fluids are the only thing allowed for breakfast on this diet.
Flushing Out Fluids
Many dieters become nervous about drinking more fluids than they normally would, erroneously thinking that the fluid will stay in their bodies and hinder weight loss. In reality, the opposite is true. Your body only holds on to fluid when it perceives that there isn't enough of it coming in -- to prevent a shortage, it keeps as much as possible and you urinate less. When you increase your water intake, your body comes to expect a frequent influx of fluid, so it releases much of the stored water and stops storing so much of what you drink. You'll urinate more, but you may notice that swelling and puffiness go away.
Fluids Help the Diet
Adequate fluid intake is especially important on the hCG diet because the use of salt is not restricted. Because the menu is so limited, many people turn to over-seasoning their food to make it more satisfying. When salt intake suddenly increases, it can cause the body to retain water. If you drink at least the two required liters per day, you can mitigate most of the water retention caused by salt. Drinking large volumes of fluids may also help you feel full between meals -- in many cases, what some people believe is hunger pangs is actually the body signaling thirst.
When You Get Bored
The strict menu causes many hCG dieters to become bored after a couple of weeks of eating and drinking the same thing every day, but beverages offer a way to add some variety to your diet without sacrificing weight loss. Mixing sparkling mineral water with a flavored liquid stevia extract makes a soda-like beverage, and mixing plain water with lemon juice and plain stevia makes lemonade. Trade coffee for a rich dark-roast espresso, or try some exotic spiced teas. Many hCG dieters even mix different types of tea to create custom blends in a huge variety of flavors, and the addition of stevia can even make some blends taste like a dessert.