Which of the following is NOT true concerning herbal supplements?a. Examples include echinacea, St. John's wort, ginseng, and ginkgo.b. Herbal supplements can have drug-like effects.c. Herbal supplements can contain toxins.d. Herbal supplements have a Recommended Dietary Allowance (RDA) associated with them.e. Herbal supplements can be dried preparations of flowers, leaves, bark, roots or seeds.
