From what I understand. Its most likely going to be illegal rather than not.
Designer Anabolic Steroid Control Act of 2014 - Amends the Controlled Substances Act to add specified substances to the list of those included within the definition of "anabolic steroid." Provides that a drug or hormonal substance (other than estrogens, progestins, corticosteroids, and dehydroepiandrosterone) that is not listed and that is derived from, or has a chemical structure substantially similar to, an anabolic steroid that is listed, shall be considered to be an anabolic steroid for purposes of such Act if it: (1) has been created or manufactured with the intent of producing a substance that either promotes muscle growth or otherwise causes a pharmacological effect similar to that of testosterone; or (2) has been, or is intended to be, promoted in any manner suggesting that consuming it will promote any pharmacological effect similar to that of testosterone.