Most physicians do not recommend taking DHEA without a medical evaluation first. Frequent colds, muscle aches, and fatigue. You exercise regularly, your weight is normal, you take vitamins, and you don't smoke. Doctors attending the Botanical Medicine in Modern Clinical Practice seminar at Columbia University College of Physicians and Surgeons are learning that the old fashioned tonic may need to be rejuvenated. For example a tonic said to normalize mood would be able to energize a depressed mood and calm an excited mood.
Modern tonics claim to be able to increase resistance to stress and thereby promote longevity.
Ashwagandha also known as Indian ginseng and astragalus are two other popular herbs that meet the requirements to be called tonics.