Widely practiced interventions that have been used for a long time are not necessarily beneficial or safe.
Interventions that have not been properly evaluated but are widely used or have been used for a long time are often assumed to be beneficial or harmless. Sometimes, however, they may be unsafe or of doubtful benefit.
BEWARE: Do not assume that interventions are beneficial or safe simply because they are widely used or have been used for a long time.
REMEMBER: Think about whether the intervention has been tested in fair comparisons.