Every thing natural may not necessarily mean good for health. Study shows that a natural compound called berberine found in Oregon grape and many other plants is not good for heart patients.
The same compound is also found in a popular chinese herb called
huang lian
. This herb is widely used for treating leg pains,
arthritis
, mumps, pneumonia, tennis elbow and many other problems.
Berberine slows down the heart contractions and so not good for people with heart problems. So take a medical advice when required.
More details about this research can be found at this
article on herbal research.