an in rem action contending that, under 21 U.S.C. § 342(a)(2)(C), the capsules should be condemned as “adulterated” food because they contain a “food additive,” the BCO, that Oakmont had not proven to be safe.
At the ensuing bench trial, certain facts were uncontradicted. BCO is a liquid obtained by squeezing black currant berry seeds. It is composed of polyunsaturated fatty acids. In its pure liquid form, it can be ingested by the spoonful as a dietary supplement. However, Oakmont markets BCO in capsules which are to be swallowed whole. The capsules contain pure BCO— nothing more. They are made from gelatin and glycerin (or an equivalent plasticizer) and have no independent nutritional value. Rather, a capsule serves a dual purpose as a container (enabling consumers to ingest predetermined quantities of BCO in solid form) and as a prophylactic (protecting the BCO from rancidity).
On these and other facts, the district court dismissed the government’s complaint and ordered the capsules released. See United States v. 29 Cartons, Etc., 792 F.Supp. 139, 142 (D.Mass.1992). The court reasoned that when, as in this case, BCO comprises the only active ingredient within a gelatin capsule, it can properly be classified as a “food,” but not as a “food additive.” See id. at 141-42. Accordingly, the FDA erred in seizing the bottles on the ground that they “allegedly eontain[] an unsafe food additive.” Id. at 142.
When the FDA appealed, the district court stayed its release order.
II. THE REGULATORY LANDSCAPE
To put this case into workable perspective, we first review the relevant statutory provisions. The Act defines “food” as:
(1) articles used for food or drink for man or other animals, (2) chewing gum, and (3) articles used for components of any such article.
21 U.S.C. § 321(f). The FDA concedes that pure BCO (sold, say, as a bottled liquid) falls within section 321(f)(1) and is, therefore, “food.” Substances classified as “food” are presumed safe. Thus, the FDA can prevent sale of bottled BCO or any other “food” only if it proves by a preponderance of the evidence that the food is “injurious to health.” 21 U.S.C. § 342(a)(1); see, e.g., United States v. Lexington Mill & Elevator Co., 232 U.S. 399, 411, 34 S.Ct. 337, 340, 58 L.Ed. 658 (1914); United States v. An Article of Food [FoodScience Labs., Inc.], 678 F.2d 735, 741 n. 3 (7th Cir.1982) (Cudahy, J., concurring). Although the FDA suspects that BCO may be unhealthful, it is unable at the present time to translate this suspicion into legally competent proof.
In addition to regulating the sale of food per se, the Act contains provisions anent food additives. These provisions are designed to protect consumers against the introduction of untested and potentially unsafe substances, such as flavor, texture, or preservative agents, into food. A gloss was added to the treatment of food additives in 1958. See Pub.L. No. 85-929, 72 Stat. 1784 (1958) (codified in scattered sections of 21 U.S.C.). Unlike section 342(a)(1), which places the burden of proving injuriousness upon the government in respect to foods, the food additives amendment allocates the burden quite differently: the FDA can prevent the sale of products containing a food additive unless and until the processor shows that the substance, when added to food, is generally recognized as safe (in the vernacular, “GRAS”). See S.Rep. No. 2422, 85th Cong., 2d Sess. (1958), reprinted in 1958 U.S.C.C.A.N. 5300, 5301-02 (explaining the processor’s burden “of proving that a newly discovered substance which ... [is] add[ed] to the food we eat is safe”). Thus, in contrast to the Act’s treatment of “food,” any substance that meets the Act’s definition of a “food additive” is presumed to be “unsafe” under 21 U.S.C. § 348 until the FDA, or more particularly, the Commissioner of Food and Drugs, has promulgated a regulation prescribing conditions assuring safe use. See 21 U.S.C. § 348(a)(2); 21 C.F.R. § 5.10(a)(1) (1992).
The 1958 amendment defines a food additive in pertinent part as: