Abstract: A preventive for circulatory diseases which can prevent the onset of circulatory diseases, particularly cerebral stroke, without causing adverse effects such as blood-pressure fluctuation. The preventive contains as the active ingredient a low-molecular-weight peptide fraction prepared by the trypsinization of casein followed by partial purification.

Abstract: A hair dye consisting of an anti-hair antibody immobilized on a high bulky coloring material. The coloring material may be a coloring substance such as an inorganic pigment, water-soluble coloring matter, or water-insoluble coloring matter, or a composite of the coloring substance and a macromolecular carrier. Since it provides a good and strong coloring capability specific to hair, the hair dye of the present invention will neither stain the skin nor cause skin irritation. Further, the touch and feel of the hair will be improved.

Abstract: Hair treatment compositions, hair damage protective agents and hair care products, each contain an active ingredient comprising an antibody which binds to human hair keratins which constitute intermediate-diameter filaments. This antibody can be produced efficiently and in a large quantities from the milk of a bovid animal immunized with said keratins. As this antibody binds to the hair specifically, it is effective in preventing the elution of proteins from the hair, imparting smoothness and flexibility to the hair, and improving the adaptability to combing and luster of the hair.