每天熱量800卡以下的減肥多半是需要在醫生指導監護之下，並且是在人極度超重、生命健康受到極端威脅下的情況才會采用的。
正常人每天的基礎代謝也有1200卡，更不要提日常活動外加有氧無氧運動了。 偶爾一天幾天沒有足夠的食物對身體沒什麽大礙，長期這樣極端的節食（800卡以下）對身體是有損害的。 國內的妹妹們好多都是這樣減肥的，去減肥論壇隨便逛上一逛，就看得到大把這樣的故事與後果。
年輕的時候，健康的時候，覺得自己做什麽都可以，怎麽做都行，我也是那個時候過來的。年輕的時候恢複的快，而且有些傷害是累積的，等人到中年，再不注意保養，就沒那麽好恢複了。
身體是自己的，寵愛自己不隻是一句空洞的口號而已，與JM們共勉。
Side Effects of a Very Low Calorie Diet
A very low calorie diet, or VLCD, is often used under medical supervision to help people who suffer from obesity lose weight more rapidly than the recommended weight loss of one to two pounds per week. Usually, people consuming a VLCD eat less than 800 calories each day. The structure of a VLCD is extremely strict and may include liquid shakes and bars, which are nutrient dense, to ensure that the dieter is still getting his recommended levels of vitamins and minerals.
A very low calorie diet is not recommended for everyone. A VLCD is reserved for those with a body mass index, or BMI, of greater than 30, which is considered obese. To put it into perspective, if you are at a healthy body weight, you have a BMI of 18.5 to 24.9. VLCDs can be dangerous for those who are pregnant or breastfeeding; children, teens and those over 50 years of age; or those with some preexisting medical conditions. Before a VLCD is prescribed, each patient is evaluated on a case-by-case basis to determine if a VLCD is a safe option for weight loss. Side Effects of a VLCD Patients who are following VLCDs often complain of fatigue, constipation, nausea and diarrhea. A VLCD can also increase the risk of experiencing more serious side effects. The most common serious side effect is the formation of gallstones, which are more common in women who are experiencing rapid weight loss. When adolescents or children consume a VLCD, their growth and development may be in jeopardy. It is extremely important that those who attempt a VLCD to lose weight are under the care of a medical professional in case any side effects present themselves. VLCD Long-Term Success A VLCD may allow a dieter to lose three to five pounds per week. Positive results can improve some medical conditions, such as diabetes, high blood pressure and high cholesterol. However, many dieters who have completed a VLCD end up experiencing weight regain. If you attempt a VLCD, use the counsel of medical professionals to work on changing your eating and lifestyle behaviors permanently. Behavior therapy, regular physical activity and follow-up treatment are strongly recommended after a VLCD is completed to improve the odds of long-term success. Beware of VLCD Fad Diets Many fad diets on the market today, such as the grapefruit diet, promote a drastically reduced caloric intake. With many of these diets, the most common cause of weight loss is the reduction of water weight, which is immediately regained after the diet is over. Many of these diets also have strict eating plans that many times eliminate entire food groups from being consumed. A dieter attempting a VLCD may be severely restricting some or most of the essential nutrients needed to maintain good health. ReferencesCandidates for a VLCD
Read more: http://www.livestrong.com/article/396404-side-effects-of-a-very-low-calorie-diet/#ixzz25nxncK82
