It is intended to provide a hair care preparation. The invention is directed to a hair care preparation (a hair regrowth agent, a hair restorer or an agent for preventing hair loss) comprising as an effective component, an enzymatic or hydrolytic degradation product of a nucleoprotein and/or DNA or RNA, a deoxyoligonucleotide, a deoxymononucleotide, an oligopeptide, an oligonucleotide or a mononucleotide spearated from the degradation product, or a mixture of at least two members selected from the degradation products or compounds. The effective component such as a deoxyloligonucleotide has a relatively small molecular weight, therefore, it is easy to be percutaneously absorbed. Further it has a cell activation effect and a blood circulation-promoting effect when it is percutaneously absorbed. Therefore, when it is applied to the scalp, an excellent hair regrowth-promoting effect, hair restoration effect and effect of preventing hair loss are exhibited. The hair care preparation of the present invention is useful as a hair care pharmaceutical product, quasi-drug or cosmetic product for mammal, particularly for humans, or a preparation to be added thereto.
