How extract from poisonous Foxglove can PROTECT against high blood pressure and heart failure

A lethal poison made from a toxic plant once used as a Victorian murder weapon could help treat millions of people with high blood pressure.
Since the 13th century, the herb Foxglove has been used to cleanse wounds and its dried leaves were brewed by Native Americans to treat leg swelling caused by heart problems.
Researchers at the University of Michigan reveal that digoxin, the active ingredient in digitalis, or Foxglove, can enhance the body's own protective mechanism against high blood pressure and heart failure. Around one in three people in Britain and the U.S have high blood pressure, also known as hypertension. The condition is linked to obesity and can be prevented by reducing salt intake, being active and keeping a healthy weight.
Most current treatments prevent excess hormone and stress signals that can lead to high blood pressure and heart failure.
But recent studies have found that the body has the ability to keep excess stimulation in check through production of a family of inhibitors called RGS proteins.
Researchers looked for ways to 're-purpose' old drugs to tap into this protective mechanism which is lost among some individuals with high blood pressure and heart failure.

Source  - Daily Mail