Which of the following statements concerning nutritional supplement (dietary supplement) are True:
a) Nutritional supplements are intended to supplement the diet and bear or contain one or more of the following dietary ingredients: a vitamin, a mineral, an herb or other botanical, an amino acid, a dietary substance for human use to supplement the diet by increasing the total daily intake (e.g., enzymes or tissue from organ or glands), a concentrate, such as a meal replacement or energy bar, a metabolite, constituent, or extract
b) Nutritional supplements are regulated as foods, and not as drugs
c) Nutritional supplements are not pre-approved on their safety and efficacy, unlike drugs
d) All of the above
