It does not work immediately. It is estimated that about 10% to 20% of impotence cases are the direct result of various psychological factors, such as low self-esteem, depression, and — especially — stress and anxiety (general and performance anxieties). Impotence, or erectile dysfunction, was once regarded as a man's worst nightmare.
Although they are often dismissed as ineffective solutions to impotence, more and more clinical research studies have found that herbs can help impotent men. The active ingredient of Tribulus acts as a natural precursor to these hormones and is converted into its final forms by the body's own natural enzymes. More than nine clinical studies performed by six universities and academic hospitals on this purified extract have confirmed the herb's beneficial effect.