Nutritional supplements are precise nutritional solutions for dietary gaps, covering categories such as vitamins and minerals, with the main features of safety, clear efficacy and efficient absorption. Customers are concerned about ingredient safety, adaptation scenarios (such as postoperative recovery, pregnancy) and absorption efficiency. Core utility: precise filling of gaps (customized supplements), functional enhancement (such as probiotics + prebiotics to regulate immunity), safety and convenience (small doses to prevent overdose). Provide a closed-loop service of testing-matching-feedback, with scientific evidence and personalized services as the core, to provide precise nutritional solutions and avoid the risk of blind supplementation.