Shenzhen Longerlive Technology Co., Ltd. (SZlongerlive) is located in Shenzhen China, focusing on production of API of biologicals and medicines. All the managers and engineers are experts in the fields of biochemistry, chemistry, or pharmaceuticals. We are mainly producing NR(nicotinamide riboside), NMN(nicotinamide mononucleotide) and HGH powder. SZlongerlive is always paying much attention to quality assurance and quality control. Its products are widely and safely used in many countries. S...