Separation and extraction method of rare ginsenoside quasi-monomeric compounds Rg5 and Rk1, nutritional composition and application

The invention provides a separation and extraction method of rare ginsenoside quasi-monomeric compounds Rg5 and Rk1, a nutritional composition and application, and belongs to the technical field of nutritional compositions. The rare ginsenosides Rg5/and Rk1 can be separated and extracted in a low-cost, high-efficiency and large-scale manner through a simple column chromatography separation technology. Meanwhile, the rare ginsenoside Rg5/and Rk1 is compounded with a plant extract, carbohydrate, protein, basic amino acid, small molecular protein peptide, grease microcapsule powder, dietary fiber, a mineral compound, a vitamin compound, immune nutrients and mogroside to prepare a composition capable of comprehensively supplementing nutrition. The composition provides comprehensive and reasonable nutrition support for patients in a perioperative period, a radiotherapy/chemotherapy period and advanced palliation treatment, has obvious effects in the aspects of enhancing immunity, promoting muscle regeneration and