Yohimbe, an African herbal medicine, can help with erections but it can also cause a number of undesirable effects.
People who get 400 to 600 mg of flavanols in their daily diets are less likely to suffer from diabetes or cardiovascular problems.
Turmeric raises the risk of hemorrhage, especially if it is combined with an anticoagulant such as warfarin (Coumadin) or clopidogrel (Plavix).