Is using herbal supplements worth the risk?

Yes. It cannot be discounted that many who have tried herbal supplements experienced an improvement in their health—whether this is due to the herbals themselves or due to a placebo effect, as long as they do not worsen the condition of an individual, then using them is worth the risk. But of course, certain things must be considered before taking those herbal supplements:
 
Your doctor knows best.

First of all, clear your condition with your doctor. Ask him/her if taking a particular herbal supplement is safe given your health condition. People with heart, liver, or kidney trouble or malfunction, are usually not advised to take these, or at the minimum is to take these herbals in minimum amounts. All substances pass through the liver and kidney to be processed and filtered respectively. Kava, which is used to relieve people from stress, has been pulled out from the Canadian, Singaporean, and German markets because it contains substances that cause liver damage. Certain herbals such as Ephedra used for losing weight, contains chemicals with heart-inducing effects that can increase heart rate, which in turn can exhaust the heart and cause heart attacks in several documented cases by the American Medical Association.

Follow the directions for use.

Never take more herbal supplements than what is directed by the doctor or as instructed on the bottle. Each individual reacts differently to the components of herbal supplements. While it is perfectly safe for one individual to take in a supplement of primrose oil capsules, another person may be allergic to it. So, do not even think about downing one bottle of

It has no approved curative effect.

No matter how the product pamphlet or the label of the bottle sounds about how it has been found to be helpful in certain health conditions, these herbal supplements are not therapeutic. So do not substitute these for the medications prescribed by your doctor for the treatment of certain diseases, or for the maintenance of blood pressure, lowering of blood sugar and cholesterol, and fight off infections.