Ohio Rev. Code Ann. § 2925.34
(A) As used in this section:
(2) "Pure caffeine product" does not include any of the following that contains caffeine and is formulated, manufactured, and labeled in accordance with the laws and regulations enforced by the United States Food and Drug Administration:
(D) Nothing in this section prohibits either of the following:
(2) Possession of a pure caffeine product by any of the following: