Acquired essential Qi mainly include nutrient Qi

clear Qi and pectoral Qi. The nature of nutrient Qi mainly refers to internal nutrient substances composited by small biological molecules of monosaccharide

amino acid

fatty acid

vitamin

mineral salt and water. The nature of clear Qi refers to oxygen-enriched air. The nature of pectoral Qi mainly embodied as energy carrier adenosine triphosphate which could be used directly by the body. Acquired essential Qi nourishes kidney essence by endocrine system and providing materials

energy and information which are used for synthetizing biological macromolecules.