Shiseido Company, Limited

Takeda Chemical Industries, Inc.

Yosuke Nakazawa

Masahiro Tajima

Eriko Takeoka

Chika Hamada

Jun Suzuki

Masazumi Watanabe

Yoshiharu Tsuji

Tsunao Magara

Masashi Ogou

Tsutomu Souma

A hair growth phase extender containing, as an effective ingredient, at least one compound selected from the group consisting of unsaturated fatty acid and/or its derivatives, especially an unsaturated fatty acid having the formula:

Extract composition as hair growth phase extender

The invention relates to a hair revitalizing tonic composition containing, as an active ingredient, at least one lipid derivative of the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4 and Y are as defined in the specification, and a and b are 0 or 1, as well as its use. Thus, there is provided a hair revitalizing tonic composition having an excellent hair loss prevention and hair revitalizing effect and, moreover, an excellent dandruff and itchy scalp prevention effect.

Hair revitalization tonic composition containing a lipid derivative and

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Yokohama, Japan

Yosuke Nakazawa