(a) substances recognized as drugs in the official United States Pharmacopoeia, official Homeopathic Pharmacopoeia of the United States or official National Formulary, or any supplement to any of them
(b) substances intended for use in the diagnosis, cure, mitigation, treatment or prevention of disease in humans or animals
(c) substances (other than food) intended to affect the structure or any function of the body of humans or animals AND
(d) substances intended for use as a component of any article specified in paragraph (a), (b) or (c) of this subsection; however, the term does not include devices or their components, parts or accessories.