| abstract |
[Problem] To provide a substance and an external preparation for skin, which improve the function of the skin which is lowered by aging, is excellent in aging skin improvement effect, and is effective in maintaining aesthetically healthy skin. A nicotinic acid derivative represented by the following general formula (1) or (2): (In the formula, A represents a hydrogen atom or a methoxy group.) [Chemical 2] (In the formula, A represents a hydrogen atom or a methoxy group.) [Selection figure] None |