Abstract: An aromatic hydrocarbon solution of a fullerene or a fullerene mixture is mixed with an ethanol solution of polyvinylpyrrolidone (PVP), water is added to the mixed solution, the solvent is removed and then an aqueous solution of a complex of a fullerene or a fullerene mixture with polyvinylpyrrolidone (PVP) is obtained. Under a condition free from a halogen, a PVP/fullerene complex excellent in manifestation of fullerene properties, stability and safety and an aqueous solution thereof are obtained.

Abstract: A preventive/therapeutic composition for free radical diseases, characterized by containing as an active ingredient at least one kind of a fullerene, a fullerene derivative, and a composite comprising a fullerene or fullerene derivative and an organic compound with which the fullerene or derivative has been modified or clathrated. The composition is reduced in side effects, has the high ability to eliminate free radicals in the body, and further has excellent preparation stability.

Abstract: A fullerene in which a solvent remains is subjected to heat treatment at a temperature higher than the boiling point of the solvent by 150° C. or more under a reduced pressure of 50 Torr or lower to reduce the residual amount of the solvent, and in order to allow the fullerene to be applied to drug products, the biohazardous residual solvent is reduced by a convenient method and removed until its concentration becomes equal to or lower than the regulatory limit.

Abstract: As a technical means of enabling the application of a fullerene and an analogue thereof in various fields relating to biocompatibility to achieve a novel function, in particular as a means of applying the same to a cosmetic product, a formulated skin preparation for external use or the like, an antioxidative composition comprising as an active ingredient at least one kind of a fullerene, a fullerene-containing oxygen derivative and the fullerene and the fullerene-containing oxygen derivative modified with or clathrated in an organic compound is prepared.