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R&D background: Solving the problem of bioavailability of oral dosage forms of protein drugs has always been a worldwide research difficulty and hot spot. The Chinese government has listed this as a key project in the Ninth Five-Year Plan and the 863 Plan, and has invested a lot of money at the same time. Mr. Wu Xiangfu, a scientist from the Institute of Biochemistry of China Academy of Sciences, Professor Zhang Yaozhou, Dean of the School of Life Sciences of Zhejiang Sci-Tech University, and other experts and related research groups, after more than 2 years of painstaking research and tackling key problems, have successfully used silkworm as a bioreactor to prepare bioactive proteins with high absorption rate for export, thus solving the bioavailability of oral dosage forms of protein drugs. This achievement is the first in the world, and won the second prize of national scientific and technological progress and the national invention patent. Because HGH plays an important physiological role in human body, its oral bioavailability has not been solved, and biogenic protein was developed by using this technology. Product Description: This product uses high-quality fresh silkworm chrysalis and silkworm eggs as bioreactors, and uses high-tech biotechnology and environmental induction technology to produce a variety of bioactive factors. HGH (including HGH releasing factors, polypeptide cytokines, amino acids and other substances) is expressed through silkworm chrysalis and silkworm eggs, and its biological activity is ensured. It is made by German ultra-low temperature freezing extraction process and refined according to GMP standard.