How should I store hCG powder?

Keep the sealed vial dry, cold and away from light, and follow the storage notes on the lot COA. Lyophilized hCG is fairly stable before mixing, especially when kept dry. Prescription hCG labels allow room-temperature storage before reconstitution, then refrigeration after mixing, with use within about 30 to 60 days depending on the product.

Once in solution, hCG is a protein that can unfold, stick to vial walls or break down, and activity drops faster at room temperature and with repeated freeze-thaw cycles. Many labs split reconstituted material into single-use aliquots and note the preparation date. Swirl gently rather than shake, since shaking can denature proteins. Our lab testing page explains the full batch panel. Shop HCG for your lab.