Doctor Lois B Ignario recieved Nobel Prize in Medicine back in 1998.
He and two other doctors discovered that the gas molecule NO or Nitric Oxide which is always produced by the body, relaxes the blood vessels and lowers blood pressure, plus it cleans the arteries.
Dr Ignario wrote a book called:
“NO” More Heart Desease!
Check it out!
Foods that are high in Argnine a protien that produces NO are:
Watermellon
Salmon
Walnuts
and many others!