hCG in Men
A positive result is never noise: the cancer-marker rule, the legitimate prescriptions, and the gray market.
hCG is called the pregnancy hormone, but it has an established place in men's medicine — and an hCG result in a man is never noise. Two very different contexts, one page.
Healthy men have essentially no circulating hCG. A confirmed positive hCG in a man is a red flag until explained, because germ cell tumors of the testis — the most common solid cancer in young men — frequently secrete it. This is why an unexplained positive belongs to a physician, promptly: testicular exam, ultrasound, and companion markers (AFP, LDH). Two important nuances: some assay interference and rare pituitary hCG (in older men) can produce low-level false signals, resolvable by the same laboratory approaches as phantom hCG — and a supplement-taking man may simply be injecting the hormone (next section). Neither nuance is a reason to skip the workup. Detected early, testicular cancer has cure rates above 95%.
hCG is structurally an LH mimic — and in men, LH is the pituitary's order to the testes to make testosterone and support sperm production. Legitimate prescription uses:
And the non-legitimate ecosystem: hCG circulates widely in bodybuilding as post-cycle “therapy” after anabolic steroids. It is prohibited at all times for male athletes by the World Anti-Doping Agency precisely because it stimulates testosterone. Gray-market hCG carries every gray-market risk: unknown dosing, contamination, and — a detail this site can uniquely appreciate — it will turn a pregnancy test positive, which is not the locker-room prank outcome most users anticipate. Injection-site infections from underground products are documented in the literature.
In a man not taking hCG, a positive hCG is a tumor marker until proven otherwise; in a man taking hCG, the medicine deserves the same respect — and the same prescription — as any other hormone.