Those men that took 3gm of the root daily for 8 solid weeks are said to have improvement in their sexual intercourse frequently when compared to those that did not take it. As Maca is very safe generally, research shows that it increased the blood pressure in the user that have cardiovascular disease that took 0.6 gm of the root daily. Therefore, it is highly suggested that your daily intake must be less than 1 g/kg or 1g/2.2 pounds.
Antioxidants boost nitric oxide production and prevent NO breakdown. Ascorbic acid has direct effects on the bioactivity of NO, and augments NO production in a variety of body processes. The effects are actually synergistic with Vitamin E. Both vitamins are not usually measured, and a reasonable dose of Vitamin C is 500 to 1,000 mg daily. Vitamin E supplementation should be limited to <400 IU per day because of potential adverse long-term health effects of higher doses.
Yohimbe A number of clinical trials have shown that the primary component of this bark from an African tree can improve sexual dysfunction associated with selective-serotonin reuptake inhibitors (SSRIs) used to treat depression. This herb has been linked to a number of side effects, including increased blood pressure, fast or irregular heartbeat, and anxiety. Yohimbe shouldn't be used without a doctor's supervision.