
The HCG diet is a weight loss program that involves taking the hormone HCG, or human chorionic gonadotropin, while consuming an extremely low-calorie diet of around 500 calories per day. While the HCG diet has been touted as a way to reduce appetite and promote weight loss, health experts warn that it is unsafe, ineffective, and potentially harmful. One of the potential risks associated with the HCG diet is blood clots. While the exact mechanism is not fully understood, it is believed that the diet's ketogenic nature can lead to dehydration, which may increase the risk of blood clots. Additionally, the HCG hormone can cause slight increases in testosterone levels in men and estrogen levels in women, which may also contribute to an elevated risk of blood clots. However, the overall risk of blood clots associated with the HCG diet is not significantly higher than that of other factors such as dehydration or certain medications. Nonetheless, the HCG diet is generally not recommended due to its potential dangers and lack of efficacy.
| Characteristics | Values |
|---|---|
| Risk of blood clots | The technical risk of blood clots is not absent with the hCG diet, but in context, it is not much higher than what would occur from simple dehydration or from other more commonly used and FDA-approved medications like oral birth control pills. |
| Dehydration | The original hCG diet protocol, due to its ketogenic nature, can commonly cause dehydration, especially in the first few weeks. |
| Testosterone levels | The hCG hormone causes a slight increase in testosterone levels in men, which can increase the risk for clots. |
| Progesterone and estrogen | hCG causes a slight increase in progesterone and estrogen levels in women. |
| Calorie intake | The hCG diet limits calorie intake to around 500 calories per day for weeks at a time, making it an extreme weight loss diet. |
| Safety | Official agencies like the Food and Drug Administration (FDA) have questioned the safety of hCG products, and numerous side effects have been reported. |
| Efficacy | There are very few efficacy studies and no significant safety studies associated with the use of the hCG diet. |
| Adverse events | As the popularity of the hCG diet continues to increase, so do the potential adverse events associated with the management of weight loss via an unproven strategy. |
| Case studies | There have been case studies of patients developing deep vein thrombosis (DVT) and pulmonary embolisms after initiating the hCG diet. |
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What You'll Learn

The HCG diet involves consuming 500 calories per day
The HCG diet is a weight loss plan that involves consuming just 500 calories per day, alongside taking supplements or injections of the hormone HCG (human chorionic gonadotropin). HCG is a hormone produced by women during pregnancy.
The HCG diet is considered controversial and potentially dangerous by health experts, who warn that such a low-calorie intake is unsustainable and unhealthy. Indeed, it is impossible to meet all your nutritional needs on just 500 calories per day. Consuming less than 1,200 calories a day can lead to vitamin and mineral deficiencies, and can cause health problems such as an irregular heartbeat and gallstones.
The HCG diet is also associated with an increased risk of blood clots. Dehydration, which is a common side effect of the diet, can lead to blood clots. Additionally, the HCG hormone can cause a slight increase in testosterone levels in men, which may also increase the risk of clots. However, the degree of testosterone increase is usually very slight and not enough to cause significant concern.
While the HCG diet may lead to weight loss, this is likely due to the severe calorie restriction rather than the HCG hormone itself. Studies have shown that HCG does not help people lose weight, reduce hunger, or promote feelings of well-being. Overall, the HCG diet is not recommended as a safe or effective method of weight loss.
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HCG is a hormone produced in early pregnancy
Human chorionic gonadotropin (hCG) is a hormone produced by trophoblast tissue, which is typically found in early embryos and eventually develops into part of the placenta. HCG is often referred to as the "pregnancy hormone" because it is made by cells formed in the placenta, which nourishes the egg after it has been fertilised and becomes attached to the uterine wall.
HCG is produced in the early stages of pregnancy, with levels rising quickly during the first trimester, almost doubling every three days for the first eight to ten weeks. HCG is what pregnancy tests detect to confirm a pregnancy, and it can be measured using blood or urine tests.
HCG plays a crucial role in maintaining early pregnancy by supporting the corpus luteum, which in turn sustains progesterone production. Progesterone and estrogen are necessary for pregnancy and fetal development. Progesterone supports pregnancy by thickening the uterine lining and keeping the uterus relaxed, while estrogen helps with fetal organ development, increases blood flow to the placenta, and helps prepare the body for labour.
In addition to its role in pregnancy, HCG also has clinical utility in reproductive and oncologic medicine. HCG levels can provide critical insights into early pregnancy, pregnancy viability, and certain hormone-secreting tumours. For example, elevated HCG levels can be indicative of certain cancers, such as choriocarcinoma and some extra-uterine malignancies.
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HCG diet can cause dehydration and increase risk of clots
The HCG diet is an extreme weight loss diet that involves the use of the hormone HCG in combination with an extremely low-calorie intake of around 500 calories per day for weeks at a time. The diet has been deemed unsafe and unsustainable for long-term weight loss by health experts, who warn that such a restrictive diet can put the body in a starvation-like state, slowing down metabolism and ultimately sabotaging weight control efforts.
The HCG diet has been associated with an increased risk of blood clots. While the HCG hormone can cause a slight increase in testosterone levels in men and estrogen levels in women, the degree of increase is typically not significant enough to raise concerns about the risk of clots. However, the ketogenic nature of the original HCG diet protocol can commonly lead to dehydration, especially in the first few weeks. Dehydration increases the risk of blood clots, and this is further exacerbated by insufficient fluid intake, a lack of electrolyte supplements, and restricted sodium intake.
It is important to note that the risk of blood clots associated with the HCG diet is not much higher than that associated with dehydration or other commonly used medications like oral birth control pills. Nonetheless, the diet has been linked to adverse effects, including deep vein thrombosis (DVT) and pulmonary embolisms, as seen in a case study of a 64-year-old woman who developed blood clots in her leg and lungs while on the HCG diet.
The HCG diet has very few efficacy studies, and no significant safety studies have been conducted. As a result, the potential risks and adverse events associated with this diet are not fully understood. Therefore, individuals considering this diet should be aware of the potential dangers and consult a physician before starting, especially if they have a history of blood clotting diseases or prior blood clots.
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HCG diet has few efficacy studies and no safety studies
The HCG diet involves taking a hormone produced during pregnancy and following a very low-calorie diet. HCG diet protocols typically recommend a daily intake of 500 to 800 calories, which may be insufficient to meet nutritional needs and may cause side effects such as gallstones, irregular heartbeat, and low electrolytes.
While there have been studies examining the effectiveness of the HCG diet, the majority of these studies have had small sample sizes, making it difficult to draw conclusive evidence. For example, a study published in the American Journal of Clinical Nutrition in 1963 only studied 19 people, with 10 taking HCG. Similarly, a 1995 meta-analysis of 24 studies found no evidence that the HCG diet helped with weight loss, reduced hunger, or promoted fat loss in specific areas.
The potential risks and side effects of the HCG diet have been highlighted by health experts, who warn that the diet is unsafe and unsustainable for long-term weight loss. The diet can put the body in a starvation-like state, slowing down metabolism and potentially leading to overeating and weight gain once the diet is stopped.
While there have been some studies examining the effectiveness of the HCG diet, there is a lack of safety studies, and the potential risks outlined above highlight the importance of further research in this area.
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HCG diet is not approved by the FDA
The HCG diet involves eating about 500 calories a day and taking supplements (either via drops or injection) of human chorionic gonadotropin (HCG) several times a week. HCG is a hormone produced by women during pregnancy.
The HCG diet is not approved by the FDA. In 2011, the Food and Drug Administration (FDA) and the Federal Trade Commission (FTC) issued warnings to seven companies that were selling illegal "homeopathic" HCG weight-loss drugs that had not been approved by the FDA. The FDA advises consumers to avoid HCG weight-loss products, which are illegal and potentially dangerous. HCG is not approved for use without a prescription for any purpose, including weight loss. The prescription drug label notes that there is "no substantial evidence" that it increases weight loss beyond that of a calorie-restricted diet, causes a more "normal" distribution of fat, or decreases hunger and discomfort.
The HCG diet is not only unhealthy but also dangerous. People on such restrictive diets are at increased risk for side effects, including gallstone formation, an imbalance of electrolytes, and an irregular heartbeat. Such restrictive diets can be potentially fatal. Very low-calorie diets can also cause an irregular heartbeat, gallstones, and other health problems.
The HCG diet can commonly cause dehydration, especially in the first few weeks, which can lead to an increased risk of blood clots. However, this risk is not much higher than that associated with simple dehydration or FDA-approved medications like oral birth control pills.
While the HCG diet may lead to weight loss, this is likely due to the low-calorie intake rather than the HCG hormone. A 1995 review of studies showed that taking HCG did not help people lose weight, treat obesity, or reduce feelings of hunger.
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Frequently asked questions
No, the HCG diet is not safe and is potentially fatal. It involves consuming only 500 calories a day and taking supplements of the hormone HCG, which can be dangerous and put the body in a starvation-like state.
The HCG diet has been associated with severe refeeding syndrome, a potentially lethal condition. Other side effects include dehydration, decreased sperm production, vaginal bleeding, ovarian cysts, and breast enlargement in men.
Yes, the HCG diet can cause blood clots. In one case study, a 64-year-old woman developed blood clots in her leg and lungs while on the HCG diet. However, the risk of blood clots is not much higher than with other low-carb diets or FDA-approved medications.
The HCG diet can increase the risk of blood clots, especially in men on testosterone replacement therapy or women with a history of blood-clotting diseases. Dehydration caused by the ketogenic nature of the diet can also increase the risk of blood clots.
If you experience a blood clot while on the HCG diet, seek immediate emergency medical attention. Blood clots can be life-threatening and require prompt treatment.











































