Men take maca side effects, there are the following points: the first point, lead to thyroid disease, goiter, hyperthyroidism, etc.. The second point, the appearance of allergies. Maca can make patients appear herpes, itching, swelling, stinging, etc. in the corners of the mouth, the skin will also appear the redness, swelling and heat pain, and diarrhea, vomiting and a series of respiratory and digestive tract symptoms, in serious cases, respiratory distress, coma, shock, etc. The third point is that maca can cause hormonal disorders, especially leading to a decrease in male libido, and induce functional impotence. The fourth point, maca can appear serious symptoms of fire. It can be manifested as dry mouth, dry throat, irritability, etc.