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Saizen made by Merck Serono is a FDA approved Huaman Growth Hormone. Saizen in Mexico comes in small 1.33 mg, 4 IU vials that is mixed manually. Saizen like Humatrope and Norditropin is FDA, pharmacy grade HGH. While Saizen does have a 8mg, 24 IU pen the price for the pen is 3x the amount per IU for the vial. If you are looking for a pen because of its easy of use, we highly recommend the Norditropin NordiLet pen.
Our favorite quality about Saizen is it is the most stable human growth hormone available. Saizen can handle 3 weeks of normal room temperature without loosing its potency. Therefore we highly recommend Saizen for people whose lifestyles have them constantly traveling.