Education — 2026-10-28
If you're researching HCG and trying to figure out which vial to buy and how to dose it, this is the one guide that covers both sizes side by side. HCG is among the most-searched compounds we carry, and the questions are almost always the same: what is it, how do I mix it, how much do I use, and should I get the 5000iu or the 10000iu vial? Here are all four answers in plain language. For laboratory research use only.
Both products are a tap away — HCG 5000iu and HCG 10000iu — with batch COAs and current pricing on their pages. Each size also has a dedicated walkthrough: the HCG 5000iu guide and the HCG 10000iu guide.
HCG (human chorionic gonadotropin) mimics luteinizing hormone, which is why it's studied in reproductive and hormonal research models — it signals the gonads much the way LH does. For the deeper biology, what is HCG peptide is the best primer.
Both vials are dosed the same way: 250–500 IU, 2–3 times per week, injected subcutaneously into the pinched fatty layer of the abdomen. The only difference is how many syringe units that dose takes, because the 10000iu vial is double-concentration when mixed with the same 2 mL of water:
| Dose | IU | 5000iu vial (2 mL) | 10000iu vial (2 mL) |
| Low | 250 IU | 10 units | 5 units |
| Standard | 500 IU | 20 units | 10 units |
Add 2 mL of bacteriostatic water to either vial. That gives:
If you want the 10000iu vial to read on the syringe exactly like a 5000iu vial, add 4 mL instead — same total IU, just more dilute. Inject the water down the vial wall, swirl gently, and refrigerate immediately; HCG is heat-sensitive. You'll need bacteriostatic water. The per-size reconstitution guides — 5000iu and 10000iu — have the step-by-step.
It comes down to how much total HCG your protocol needs:
The HCG 5000iu vs 10000iu comparison breaks down the per-IU economics if you're on the fence.
HCG is heat-sensitive for both sizes. Refrigerate the dry powder, and after reconstitution keep it at 2–8°C and use within about 30 days. Don't leave it at room temperature and avoid freeze-thaw cycles. Monitor for estrogen rise and water retention in research models. HCG is also commonly studied alongside GP-class compounds — see using HCG with GLP compounds.
With a hormone-signaling compound, an accurately filled, genuinely pure vial is what makes your IU count meaningful. Every HCG vial from Platinum Biolabs — 5000iu and 10000iu — ships with a batch-matched COA at 99%+ HPLC purity, handled from a US facility. Code PLATINUM25 takes 25% off at checkout.
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.