Answer: This is a very important question and we want you to understand the differences between AgeForce® and other brands. All AgeForce® HGH supplements are manufactured in the Untied States in FDA-GMP certified laboratories. For quality assurance, we do not, and will not, use cheaper imported HGH in our formulas. All formula ingredients (including the recombinant human growth hormone) used in our formulas, are sourced from leading United States pharmaceutical companies. For consistent quality, effectiveness, and your safety, we use recombinant HGH, which is an exact genetic duplication of human growth hormone (191) amino acid chain) We do not use animal (Bovine) HGH. Our HGH is tested and shown to be safe from any negative toxicity, mutogenicity, and carcinogenic activity. Our state-of-the-art filtration system insures purified air throughout the production process. We even employ special lighting instead of fluorescent lighting, because fluorescent lighting can compromise the formula ingredients. Vital steps in the formulation are done by hand! All or our HGH is hand-succussed (energetically activated) to avoid any exposure from electrical motors. Hand succussing HGH is a very slow, expensive, labor intensive production method, but we will not automate this very important production step because hand-succussing yields a far superior HGH formulation.