Hello Thanks for query . The problem of Erectile Dysfunction that you have is age related .As the age advances there is fall in serum testosterone by 1% for every year .This lowered serum testosterone is one of the factors is the cause of Ed . Other factors like senile atherosclerosis involving the blood vessels of penis leading to reduced blood flow to penis along with neuritis are important factors leading to ED. There are so may agencies and manufacturer marketing various drugs and supplements who claim to solve this problem of ED .But none of these have any scientific base for their claim . I would suggest you not to fall in such plays .Instead consult qualified Urologist for scientific evaluation of your problem and further treatment . Taking Sildenafil or Cialis on demand will help to resolve the issue . Dr.Patil.