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HCG (Human Chorionic Gonadotropin)

Written by The Peptide Record editorialClinical review not yet completedLast reviewed 1 October 2026Funding No vendor payment

Yes, it's a real approved drug (Novarel, Pregnyl) for narrow reproductive-endocrinology uses. No, it is not effective for weight loss — and that's not our assessment, it's the language on the FDA-approved label itself. The TRT/fertility-preservation use it's most often bought for today is off-label, not fraudulent the way the weight-loss use is, but not what it was approved or tested for either.

Evidence grade B: what kinds of studies support the claims on this page, with limits. It is not a verdict on any product. How we grade

On this page

  1. What it's actually approved for
  2. The weight-loss claim FDA rejects
  3. Off-label use in testosterone therapy
  4. Safety and legal notes

In brief

Should you care? Yes if you've seen it marketed for weight loss — the FDA-approved label for this exact drug says plainly that it doesn't work for that.

The short version

  • Genuinely approved for narrow fertility and hypogonadism indications, not weight loss.
  • FDA's own label states HCG has not been shown effective for weight loss beyond caloric restriction alone.
  • Widely used off-label in testosterone-therapy protocols, with supportive mechanistic evidence but no dedicated randomized trial for that specific use.

Update, 1 October 2026

This page no longer prints dose figures for off-label use, and its sentence about trial evidence now says only that this page cites no large randomized controlled trial of HCG for that use. No facts about HCG's approval or labelling changed. No evidence grade changed.

What it's actually approved for

FDA-approved HCG products (Novarel, Pregnyl) are indicated for prepubertal cryptorchidism not due to anatomic obstruction; selected cases of hypogonadotropic hypogonadism in males; and induction of ovulation and pregnancy in anovulatory infertile women whose anovulation is secondary. Novarel's initial US approval dates to 1974.

The weight-loss claim FDA rejects

The FDA-mandated label language for approved HCG products states plainly that "HCG has not been demonstrated to be effective adjunctive therapy in the treatment of obesity," and that there is no substantial evidence it increases weight loss beyond what caloric restriction alone produces. FDA and FTC have jointly pursued sellers of over-the-counter "HCG diet" products for exactly this reason. No FDA-approved weight-loss product contains HCG.

This isn't our assessment — it's the label

The "not demonstrated effective... obesity" language is FDA-mandated text on the approved product's own label, not an outside critique.

Off-label use in testosterone therapy

Off-label, HCG is widely used in testosterone-replacement protocols to prevent testicular atrophy during therapy and to help restart natural sperm production afterward, since exogenous testosterone suppresses the body's own hormonal signaling to the testes. There's real supportive mechanistic and observational literature behind this practice, but this page cites no large randomized controlled trial of HCG for this exact off-label use — the physiology is sound and the practice is widespread, but that's a different thing from a dedicated trial confirming it.

Safety and legal notes

HCG is not legally available over the counter in the US and requires a prescription. It also remains subject to anti-doping rules for competitive athletes.

What you can do next

References

  1. Novarel/Pregnyl FDA-approved labeling, accessdata.fda.gov — the "not demonstrated effective... obesity" language is FDA-mandated label text.
  2. FDA and FTC enforcement actions against over-the-counter "HCG diet" product sellers.