What Is the HCG Diet? Foods, Rules, Risks & Alternatives

Disclaimer

Educational only. Not medical advice. This page describes the HCG diet so readers can recognize it. Explain ≠ endorse.

HCG means human chorionic gonadotropin, a hormone the placenta makes in pregnancy. The diet pairs that hormone — or drops, pellets, sprays, and injections sold under the name — with a very-low-calorie pattern. The U.S. Food and Drug Administration (FDA) tells consumers to avoid HCG weight-loss products. HCG is not approved for weight loss, and it is not approved without a prescription for any purpose. Warnings describe plans near 500 calories a day: gallstones, electrolyte problems, an irregular heartbeat, and harm that can be fatal.

Do not start from an article. If you already have a product or a clinic handout, stop both the product and the dieting instructions, and talk with a qualified clinician. A registered dietitian nutritionist (RDN) can help with ordinary meals. No results are guaranteed.

Restrictive risk band. Strong caution. This is a crash pattern with a hormone story. The calorie cut explains the scale. The hormone does not. No doses, phase calendars, gram weights, or sample day appear below.

Quick facts

What it is	HCG, or a product marketed as HCG, plus a very-low-calorie diet.
The hormone	Made in pregnancy. Prescription HCG is used in some fertility care. Weight loss is not an approved use.
What is sold	Drops, pellets, or sprays; some clinics use injections. “Homeopathic” on a label is marketing, not proof of safety.
Calories in the warnings	About 500 a day (FDA). Often 500 to 800 (Mayo Clinic). A risk description, not a target.
Risk band	Restrictive. Explain ≠ endorse.
Not the same as	A balanced plate, Mediterranean eating, or DASH.
Safer baseline	Grocery meals you can keep, with clinical care if illness or weight is why you want a change.

The hcg diet grew from a 1950s clinic plan by British physician A. T. W. Simeons: this pregnancy hormone plus a tiny food list. Later sellers moved the same claim into bottles — that the hormone would blunt hunger or pick where fat came off.

The prescription label, as the FDA quotes it, says there is no substantial evidence that HCG adds weight loss beyond caloric restriction, causes a more “normal” distribution of fat, or eases the hunger of calorie-restricted diets. It also states that HCG has no known effect on fat mobilization, appetite, hunger, or body-fat distribution.

How it works

Ads bundle a hormone and a diet. Only the diet moves the scale.

The hormone. In pregnancy, HCG supports early pregnancy hormones. Lab-made HCG is an FDA-approved prescription drug for female infertility and some other conditions. Weight loss is outside those uses. This page does not explain how to get HCG, mix it, inject it, or pick a dose.

The diet. People are told to eat very little while using the product. FDA guidance describes about 500 calories a day. Mayo Clinic’s June 4, 2024 patient answer describes the usual range as 500 to 800. Loss at that intake is the energy gap. In the FDA’s consumer update, Carolyn Becker of the Center for Drug Evaluation and Research said people credit HCG because the scale moves, and the data do not support that. Any loss is from severe calorie restriction. Ads quoted there promise to “reset your metabolism” and to take off 20 to 30 pounds in 30 to 40 days. Those are sales lines, not a schedule.

Clinicians sometimes use a very-low-calorie diet for adults with more weight to lose, inside care for problems such as high blood pressure. The FDA says even that needs strict, constant supervision, or vitamins, minerals, and protein run short. A bottle, a coach, or a spa is not that supervision. HCG does not make it safer.

Some clinics still inject prescription HCG for weight loss. FDA warnings focus on drops, pellets, and sprays sold online, in stores, and at clinics. The agency has called them unsafe, and a “homeopathic” label illegal. In December 2011 the FDA and the Federal Trade Commission warned sellers of over-the-counter “homeopathic” HCG: unapproved drugs, unsupported claims. Whether a bottle contains the hormone or not, the calorie instruction is the harm that remains.

Foods and rules

Published menus keep a short set of lean proteins, a few vegetables, a little fruit, and coffee or tea, and they push off added fat, starch, most dairy, sugar, and mixed dishes. Portions are tiny on purpose. Gram weights and a sample day would be the crash plan, so they are not printed here.

• The intake is a crash level for a stretch of days or weeks. Warnings cite about 500 calories, sometimes discussed up toward 800. Neither figure is a goal.
• The allow-list is short, so fiber and vitamins from grains, beans, dairy, and varied produce fall away.
• Fat is treated as forbidden in order to keep the total tiny. A balanced plate keeps fats that make meals satisfying.
• Phases show up in the marketing: a short higher-intake start, the very-low-calorie stretch, then a staged return to food. No phase lengths, “loading” steps, or maintenance ladder belong here.
• The product is supposed to make hunger acceptable. The label says that evidence is lacking. Hunger here is a signal, and a normal dinner is not a failure.

Potential benefits

People look this up for fast loss and milder hunger. Those wants do not make the pattern safe. On a few hundred calories the scale can move, and Mayo Clinic ties that to the calorie cut — the same speed linked to gallstones, electrolyte shifts, and heart-rhythm risk. A closed menu feels simple because shared meals no longer fit. A clinic and a scientific name make the scheme feel medical. Weight loss is still not a labeled use.

Hunger relief, spot reduction, and a metabolism “reset” are ad claims. FDA-cited labeling says substantial evidence for them is absent. When eating becomes ordinary again, weight often returns, because the habit was a tiny list.

What the evidence supports

The FDA update “Avoid Dangerous HCG Diet Products” says to avoid the products, discard them, and stop the dieting instructions. Loss is from the calorie cut, not from HCG. Mayo Clinic’s June 4, 2024 answer says the diet is not safe, does not lead to lasting weight loss, and that the products alone are unproven. This draft invents no trial names or statistics.

Risks and who should avoid it

Restrictive is the right band. Most everyday food is removed, and intake sits where harm is built in.

Harms tied to the calorie cut

The FDA names gallstones, an imbalance in the electrolytes muscles and nerves need, an irregular heartbeat, and danger that can be fatal. It also warns that unsupervised plans run short on vitamins, minerals, and protein. Mayo Clinic describes the same nutrient gaps, with electrolytes too high or too low. Low protein and energy can cost muscle. That follows from under-eating. It is not a reason to add a hormone.

Seek urgent care for chest pain, fainting, confusion, a racing or irregular heartbeat, or severe weakness. Those are not a phase to push through.

Harms tied to the products

Mayo Clinic’s summary of reported effects includes headache, fatigue, trouble sleeping, depression, fluid retention (edema), and enlarged breast tissue in men (gynecomastia). Rarer reports include blood clots, testicular tumors, and ovarian cysts. The page links the products with making some cancers worse, including prostate cancer, because HCG may raise androgens that help those cells grow. That is a reason to stay away, not a personal prediction and not a dosing chart. Anyone who used a product and feels unwell should contact a clinician. Harm can be reported to FDA MedWatch.

Weight often rebounds, because the plan never taught a keepable plate. Phase rules can harden all-or-nothing eating, especially after harmful restriction. Shared meals become violations, and a clinic receipt can make a starvation menu feel supervised. Stacking fasting or another elimination diet makes this intake worse. Keto and commercial plans such as Optavia are restrictive peers, not safer swaps.

Who should stay away

Do not use HCG products or this calorie level for weight loss. The reasons are sharper if any of these apply:

• Pregnancy, trying to conceive, or breastfeeding
• Childhood or adolescence
• An eating disorder, past or current
• Gallbladder disease or gallstones
• Heart disease or an irregular heartbeat
• Kidney disease, or electrolytes that are already hard to hold steady
• Cancer, including prostate cancer, or a history a clinician is still watching
• A past blood clot
• Insulin or other glucose-lowering medicine — a crash intake can make a usual dose unsafe, and only the prescriber changes it
• Blood pressure drugs, diuretics, anticoagulants such as warfarin, lithium, or thyroid medicine — very low intake can change how drugs behave
• Underweight, frailty, or recovery from malnutrition

Ask before a sharp cut in food if you are in care for anything else. The medicine notes above are reasons to pause, not a chart for adjusting pills.

Safer alternatives

Ordinary food, in a pattern you will still recognize next year, is the safer default.

• Balanced plate. Vegetables and fruit, protein, satisfying carbohydrates, and fats. No hormone product and no 500-calorie ceiling.
• Mediterranean. Plants, olive oil, legumes, whole grains, and fish, with room for shared meals.
• DASH. A lifestyle-band pattern used in blood-pressure education. Food groups stay on the plate.
• Sustainable weight loss. Slower change, without a fad calendar.
• Calorie deficit, explained. A modest energy gap is a different idea from a few hundred calories a day. That article assigns no personal number.

Ask an RDN for a meal rhythm you can repeat. Very-low-calorie approaches, when used at all, belong under medical monitoring. Questions about a weight or blood-sugar prescription belong with that prescriber.

FAQ

What is the HCG diet?

A scheme that combines human chorionic gonadotropin, or a product sold as that hormone, with a very-low-calorie diet. Popular versions are described as about 500 calories a day, sometimes up to about 800. Prescription HCG has medical uses, including some fertility care. Weight loss is not an approved use.

Does HCG cause the weight loss?

The FDA attributes the loss to severe calorie restriction, not to the hormone. Labeling cites no substantial evidence that HCG adds loss, moves fat, or makes the diet more comfortable. Mayo Clinic says the pattern does not produce long-term weight loss.

Is the HCG diet safe?

No. The FDA says to avoid the products. Near 500 calories a day, risks include gallstones, electrolyte imbalance, an irregular heartbeat, and harm that can be fatal. Reported effects include headache, fatigue, depression, fluid retention, and breast enlargement in men, with rarer reports of blood clots.

What can you eat on it?

Published plans use a very short list and portions small enough to force a crash intake. This page does not reprint weights or a sample menu. The baseline here is a balanced plate.

Are drops safer than injections?

No. The FDA told people to avoid the drops, pellets, and sprays. “Homeopathic” does not make them legal or gentle. Injections use a prescription hormone for a purpose the label does not support, and they are still tied to the same calorie cut.

Who should avoid it?

Do not use it for weight loss. Pregnancy, breastfeeding, childhood, disordered eating, heart or gallbladder or kidney disease, cancer including prostate cancer, past clots, and medicines for glucose, blood pressure, clotting, mood, or thyroid disease are especially poor fits. If you feel unwell after starting, stop and contact a clinician. Do not change a dose from a forum.

Related

• Balanced plate — meals without a crash calorie ceiling
• Sustainable weight loss — slower change, no hormone product
• Mediterranean diet — lifestyle-band sibling
• DASH diet — lifestyle-band sibling
• Keto diet — restrictive peer, not a safer swap
• Optavia diet — commercial very-low-calorie peer, not a safer swap
• Diets directory — A–Z encyclopedia hub

Article URL for this entry: /diets/hcg/ only.

Sources

No trial was invented here, and no dose was copied from a label.

• U.S. Food and Drug Administration. “Avoid Dangerous HCG Diet Products.” Not approved for weight loss; loss is from calorie restriction; gallstones, electrolyte imbalance, irregular heartbeat, potentially fatal harm.
• FDA and Federal Trade Commission, December 6, 2011. Warnings on over-the-counter “homeopathic” HCG products as unapproved drugs.
• Mayo Clinic Staff. “HCG diet: Is it safe and effective?” June 4, 2024. Not safe; no lasting loss; often 500 to 800 calories; product harms, including a link with some cancers such as prostate cancer.
• Prescription labeling, as quoted by the FDA: no substantial evidence of extra loss, fat redistribution, or less hunger; no known effect on fat mobilization, appetite, or body-fat distribution.

Last reviewed

2026-09-24

Educational only. Not medical advice. Do not use HCG products for weight loss. Talk with a qualified clinician before any very-low-calorie approach.