HCG
Human chorionic gonadotropin (hCG)
What is HCG?
HCG: Human chorionic gonadotropin, a glycoprotein hormone that mimics LH to stimulate testicular Leydig cells (testosterone) and ovarian ovulation. The sources cited here most often discuss it for: Keeps testicular function on TRT; Treats male hypogonadism; Size, libido and mood, anecdotal. Evidence label: Approved (specific use).
- Type
- Peptide
- Family
- Sexual Health & Hormones
- Evidence label
- Approved (specific use) (5 of 5)
- Regulatory status
- FDA has approved HCG as a prescription drug for female infertility and other medical conditions; it is not approved for weight loss or for use without a prescription, and FDA advises consumers to avoid HCG weight-loss products sold as oral drops, pellets and sprays.
- Goals discussed
- Hormones & Fertility, Libido & Sexual Health
- Also called
- human chorionic gonadotropin, chorionic gonadotropin, Pregnyl, Simeons therapy, pregnancy hormone
- Last reviewed
- 2026-10-11
- Human chorionic gonadotropin, a glycoprotein hormone that mimics LH to stimulate testicular Leydig cells (testosterone) and ovarian ovulation; FDA-approved (Novarel, Pregnyl) for prepubertal cryptorchidism, male hypogonadotropic hypogonadism, and ovulation induction; label states it is NOT effective for weight loss.12
Regulatory status FDA has approved HCG as a prescription drug for female infertility and other medical conditions; it is not approved for weight loss or for use without a prescription, and FDA advises consumers to avoid HCG weight-loss products sold as oral drops, pellets and sprays. 3
But the data simply do not support this; any loss is from severe calorie restriction. Not from the HCG.
FDA official on HCG weight-loss products sold alongside very low calorie diets.
What is HCG researched for?
The three outcomes most discussed for HCG in the sources below, as those sources report them. humanpeptides.fyi makes no claims of its own: a listed benefit can be unproven or can have failed in trials, and the label on each line says which.
What do researchers and users say about HCG?
Treatment with human chorionic gonadotropin (hCG) has shown the ability not only to reverse azoospermia brought on by testosterone supplementation therapy but also to help maintain elevated intratesticular testosterone levels.
Abstract of a narrative review on protecting sperm production in men taking testosterone.
HCG and TRT go together like peanut butter and jelly! HCG makes up for what TRT takes away.
Forum self-report; the same user noted carrying more water from higher estradiol, and others in the thread reported mood swings or poor sleep.
What side effects of HCG are reported?
- Label warnings: ovarian hyperstimulation syndrome, multiple pregnancy, arterial thromboembolism, precocious puberty in boys, gynecomastia, headache, irritability, edema1
- Elevated estradiol, water retention or worse sexual function in some TRT usersanecdotal12
- Severe allergic reactions including anaphylaxis, and rarely generalized rash or fever.FDA label1
- Depression, restlessness and fatigue.FDA label1
- Fluid in the chest (hydrothorax) as a complication of severe ovarian hyperstimulation in women.FDA label1
- The very low calorie diets sold with HCG weight-loss products raise the risk of gallstones, electrolyte imbalance and irregular heartbeat, and can be potentially fatal.FDA consumer warning3
What do peptide guides say about HCG?
- Seek Peptides Seek Peptides notes that hCG, at 237 amino acids, is technically a protein hormone rather than a peptide, and is grouped with peptides because it mimics LH to keep the testes producing testosterone. 13
- NCBI PMC A review of fertility care in men on testosterone reports that hCG can restore sperm production after testosterone-induced azoospermia, and is often paired with selective estrogen receptor modulators. 6
- NCBI PMC A meta-analysis of 24 trials of the Simeons hCG diet rated most studies as poor quality; of the 12 better-designed studies, only one found hCG a useful addition to dieting. 14
- FDA FDA says HCG weight-loss products are typically sold as drops, pellets and sprays with a roughly 500 calorie a day diet, and that hCG is not approved for use without a prescription for any purpose. 3
What does the research say, system by system?
Body & tissues2
Hormones & physiology2
Brain, mood & sleep1
- Some users report mood/sleep disturbances, likely estrogen-relatedanecdotal Reddit9
Weight & metabolism3
Muscle1
- No direct data identified (indirect only via raising testosterone)
How strong is the evidence for HCG?
FDA-approved with solid human data for hypogonadism/fertility; strong evidence it does NOT work for weight loss; TRT-adjunct benefits supported by small human studies + anecdotes
Approved by the FDA (or a major regulator) for at least one specific use. Approval covers that use only, not the other benefits listed. How tiers work
Questions about HCG
What is HCG?
Human chorionic gonadotropin, a glycoprotein hormone that mimics LH to stimulate testicular Leydig cells (testosterone) and ovarian ovulation.
Is HCG FDA-approved?
FDA has approved HCG as a prescription drug for female infertility and other medical conditions; it is not approved for weight loss or for use without a prescription, and FDA advises consumers to avoid HCG weight-loss products sold as oral drops, pellets and sprays.
What is HCG researched for?
The sources cited on this page most often discuss three outcomes: Keeps testicular function on TRT; Treats male hypogonadism; Size, libido and mood, anecdotal. Each line above shows what the source reports and how strong that evidence is.
What side effects of HCG are reported?
Reported in the cited sources: Label warnings: ovarian hyperstimulation syndrome, multiple pregnancy, arterial thromboembolism, precocious puberty in boys, gynecomastia, headache, irritability, edema; Elevated estradiol, water retention or worse sexual function in some TRT users; Severe allergic reactions including anaphylaxis, and rarely generalized rash or fever. The list is not complete, and few listed risks does not mean a compound is safe.
How strong is the evidence for HCG?
Evidence label: Approved (specific use). FDA-approved with solid human data for hypogonadism/fertility; strong evidence it does NOT work for weight loss; TRT-adjunct benefits supported by small human studies + anecdotes.
What else is HCG called?
Names used for it include human chorionic gonadotropin, chorionic gonadotropin, Pregnyl, Simeons therapy, pregnancy hormone.
Does humanpeptides.fyi recommend HCG?
No. humanpeptides.fyi makes no claims and no recommendations of its own. It summarizes and links to what others have published and posted. Nothing here is medical advice; talk to a licensed clinician.