The dangers of drinking yellow essence water for a long period of time are not clear. Drinking yellow essence water for a long time or in large quantities is not recommended. Yellow essence, has the effect of nourishing yin and moisturizing the lungs (nourishing the lungs by replenishing the lung fluid), tonifying the spleen, nourishing the kidney and filling the essence. It is mainly used for treating yin deficiency and laborious cough, lung dryness and cough, spleen deficiency and fatigue, poor appetite and dry mouth, thirst; kidney deficiency and lumbar and knee weakness (a feeling of soreness and weakness in the waist and knees), impotence and spermatorrhea, tinnitus and darkness in the ears and eyes, premature whitening of the beard, and weakness and thinness of the body. Yellow essence is forbidden to be taken by people with cold and diarrhea, phlegm-dampness and plumpness (stomach distension and discomfort) and stagnation of Qi. The effective dosage of yellow essence in water or boiled water is limited and generally cannot achieve therapeutic effect. If there is any discomfort after drinking yellow essence water, it is recommended to stop using it and seek medical advice promptly.