Drinking yellow essence in water has the effect of nourishing yin and moisturizing the lungs (nourishing the lungs by replenishing the lung fluid), tonifying the spleen, nourishing the kidneys and filling up the essence, but the effect is limited and generally fails to achieve the effect of treating diseases. Huang Jing (黄精), is used for treating yin deficiency and laborious coughing, lung dryness and coughing, spleen deficiency and fatigue, low food and dry mouth, thirst; kidney deficiency and lumbar and knee soreness and tenderness (a feeling of soreness and weakness in the lumbar area and knees), impotence and spermatorrhea, tinnitus and darkness of the eyes, premature whitening of the beard and hair, weakness and thinness of the body, and wind, mange, ringworm and fungal diseases. Yellow essence is forbidden to be taken by those who have cold and diarrhea, phlegm-dampness and stagnation of qi (stomach distension and discomfort). It should be noted that the effective dosage of yellow essence in water is limited and generally cannot achieve a therapeutic effect. If you want to achieve the desired effect, it is recommended to take regular treatment under the guidance of a doctor.