Deer antler belongs to the Chinese medicine, the medicinal nature of warm, men should not take too much, you can take 1~2 grams at a time, the dosage of a day should not exceed 3 grams. Deer antler is the young antlers of sika deer or velvet horse deer, with the effect of tonifying the kidney and yang (the role of tonifying the kidney and yang), generating essence and blood, strengthening the tendons and bones, regulating the stroke, and supporting sores and poisons. Deer antler can be used to treat kidney deficiency, dizziness, deafness, darkness of the eyes, impotence, spermatorrhea, cold uterus infertility, lethargy, fatigue (lack of mental energy), fear of cold, lumbar and spinal cold pain, impotence of sinews and bones, leakage (excessive menstrual flow or more than a drop) with lowering of the belt, yin gangrene (a category of slow negative sores and ulcers of a general term) does not convergence and chronic disease and deficiencies and other evidence. Taking too much can cause adverse reactions, such as abdominal pain, nausea, cold sweat, etc. Do not take too much, deer antler is mainly powdered, 1-2g at a time. It is advisable to start with a small amount of this product and increase it slowly, and it is not advisable to consume a large amount of it suddenly, so as to avoid Yang rising and wind moving, or injuring Yin and moving blood. It should be avoided in cases of yin deficiency and hyperactivity of yang (deficiency of yin fluid and hyperactivity of yang qi), heat in blood (in the four periods of warm disease, Wei qi and Ying blood, it is the deepest stage or location of the disease), fire in the stomach or phlegm and heat in the lungs, as well as those who are suffering from exogenous heat diseases.