hCG for Weight Loss: What the Evidence Shows
What human and animal studies show about hCG for weight loss, how strong that evidence is, and what is still unproven.
- Strongest evidence
- Human RCT
- Human studies
- 156
- PubMed records, our ledger
- Animal studies
- 124
- PubMed records, our ledger
- Studies we summarised
- 5
- with an outcome for weight loss
Evidence for weight loss
Each row is an outcome related to weight loss from a published study, strongest design first. Animal and cell results are labelled and are not human results. User reports are not counted as evidence here.
| Outcome | Result | Study type | Source |
|---|---|---|---|
| Lean body mass and fat mass | Lean body mass rose by about 2 kg (P < 0.001), body weight about 1 kg and fat mass fell about 1 kg (P < 0.05). | Human RCTn = 40 | The Journal of clinical endocrinology and metabolism 2002, PMID 12107212 |
| Weight loss vs placebo | hCG showed no advantage over placebo for any recorded variable in obese women on a diet. | Human RCTn = 40 | South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde 1990, PMID 2405506 |
| Weight loss vs placebo | No significant difference in weight loss, waist/hip circumference or hunger between hCG and placebo. | Human RCTn = 51 | The American journal of clinical nutrition 1976, PMID 786001 |
| Body composition | hCG treatment lowered insulin resistance, triglycerides, body fat ratio and waist-to-hip ratio and raised fat free mass in IHH. | Human uncontrolled trialn = 16 | Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme 2016, PMID 26485362 |
| Efficacy in obesity | Meta-analysis found no scientific evidence that hCG is effective for obesity. | Meta-analysis | British journal of clinical pharmacology 1995, PMID 8527285 |
PubMed records for hCG and weight loss: 156 human, 124 animal (search counts, not studies we reviewed). Grades follow our evidence scale.
How strong is it?
A human randomized trial outweighs any number of animal studies. Animal and cell results show a mechanism worth testing, not that it works in people.
Other peptides people research for weight loss
All peptides for weight loss, comparedCommon questions
Does hCG help with weight loss?
The strongest study we summarise for weight loss is human rct evidence, across 5 studies with an outcome for weight loss. A trial result is not an approval; see the legal status.
Is hCG approved for weight loss?
hCG is FDA approved (prescription only). Which conditions that approval covers is set by the label; use for anything else is off-label.
What is the best peptide for weight loss?
There is no single answer. Our weight loss overview compares each candidate by evidence grade and legal status rather than by popularity.
More on hCG
Sources
- 1A double-blind, placebo-controlled, randomized clinical trial of recombinant human chorionic gonadotropin on muscle strength and physical function and activity in older men with partial age-related androgen deficiency.The Journal of clinical endocrinology and metabolism · 2002PMID 12107212Accessed 2 Oct 2026
- 2Human chorionic gonadotrophin and weight loss. A double-blind, placebo-controlled trial.South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde · 1990PMID 2405506Accessed 2 Oct 2026
- 3Ineffectiveness of human chorionic gonadotropin in weight reduction: a double-blind study.The American journal of clinical nutrition · 1976PMID 786001Accessed 2 Oct 2026
- 4The Effects of Gonadotropin Replacement Therapy on Metabolic Parameters and Body Composition in Men with Idiopathic Hypogonadotropic Hypogonadism.Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme · 2016PMID 26485362Accessed 2 Oct 2026
- 5The effect of human chorionic gonadotropin (HCG) in the treatment of obesity by means of the Simeons therapy: a criteria-based meta-analysis.British journal of clinical pharmacology · 1995PMID 8527285Accessed 2 Oct 2026
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