Dosing Guide — 2026-11-12
Unlike peptides that are run in fixed 4–12 week blocks, HCG doesn't have a single "cycle length" — how long it's run depends entirely on the research endpoint. This guide covers the common run structures, when HCG is used continuously vs. cycled, and how cycle length drives how many vials you need. For dose and frequency, see the HCG injection frequency guide.
::shop hcg-5000 hcg-10000
| Use context | Typical structure |
| Alongside TRT research | Often continuous — reasonable to leave on unless indicated to pause |
| Fertility-focused research | Shorter targeted runs tied to the endpoint |
| Non-medical experimentation | 4–8 weeks off periodically |
HCG doesn't drive the receptor-desensitization concerns that GH-axis peptides do, which is why continuous use is common in testosterone-support research rather than fixed on/off cycling.
HCG stimulates testosterone production, and that raises estrogen downstream. Protocols that periodically take 4–8 weeks off do so mainly to let estrogen normalize and to re-baseline hormonal bloodwork — not because of tolerance. See HCG side effects research for the estrogen angle.
Whether run continuously or in blocks, the per-dose amount stays the same: 250–500 IU, 2–3× weekly. Longer runs don't mean higher doses — they mean more total vials. See the HCG dosage chart.
At the standard dose, here's how long each vial lasts — and therefore how cycle length maps to vials:
| Vial | 500 IU 3×/week | 250 IU 2×/week |
| HCG 5000iu | ~3 weeks | ~10 weeks |
| HCG 10000iu | ~6–7 weeks | ~20 weeks |
For a long continuous run, the HCG 10000iu vial is the economical choice — at a lower 2×/week dose it can cover most of a 4–5 month block on a single vial.
One practical constraint: HCG is heat-sensitive and keeps ~30 days reconstituted. So even on a long cycle, only mix one vial at a time and keep it refrigerated — don't reconstitute a quarter's worth at once. See HCG storage and shelf life.
Disclaimer: All information presented in this article is for educational and informational purposes only. Platinum Biolabs does not promote or endorse the use of peptides for human consumption. All products sold by Platinum Biolabs are intended strictly for laboratory and research use only. Consult a qualified healthcare professional before making any health-related decisions.