What is the difference between the effects of processed Polygonatum (Shu Huangjing) and raw Polygonatum (Sheng Huangjing)?

The difference between processed Polygonatum (熟黄精) and raw Polygonatum (生黄精) lies in their effects: processed Polygonatum primarily focuses on moistening the lungs and nourishing yin, whereas raw Polygonatum mainly emphasizes tonifying the spleen and boosting qi. The detailed analysis is as follows:

1. Processed Polygonatum

Processed Polygonatum is obtained by steaming raw Polygonatum in boiling water until it penetrates the center, followed by drying. It has a sweet taste and neutral nature, and acts on the spleen, lung, and kidney meridians. It functions to moisten the lungs, relieve cough, and nourish yin, and is commonly used to alleviate symptoms such as dry cough with little phlegm and nasal dryness.

2. Raw Polygonatum

Raw Polygonatum is made directly from dried Polygonatum rhizomes. It primarily focuses on strengthening the spleen and enhancing qi, with main actions including invigorating the spleen and stomach, moistening the lungs to stop coughing, and nourishing yin to promote body fluid production.

Patients experiencing cough or dry mouth should select medications under the guidance of a qualified physician based on their individual conditions, avoiding self-medication.