Hello. Velvet antler is pure yang. Of course, don't eat without a serious illness. Because after taking it, the general medicine will not work in the future.

In addition, 19 years old, generally not particularly weak constitution. Unless you're really sick.

If it is just general weakness, such as fear of cold and lack of energy to drink hot water, and the tongue coating is thin and white, it is recommended to take the Chinese patent medicine Jinkui Shenqi Pill. Just eat according to the instructions.

In addition, go to bed before 10: 30 at night, don't masturbate, don't have sex once, just take care of yourself. Otherwise, it's no use taking fairy medicine.