The invention relates to the use of alduronic acids and dialdehydes of the aldoses and derivatives thereof as tanning enhancers for dihydroxyacetone or for a mixture of self-tanning substances comprising dihydroxyacetone or as self-tanning substance. The invention furthermore relates to the use thereof for modulation of the hue achieved in the case of tanning with dihydroxyacetone or by the mixture or preparation comprising dihydroxyacetone. The invention furthermore relates to the use thereof as contrast reduction agent in a mixture or preparation comprising at least dihydroxyacetone as self-tanning substance. The use of such compounds enables a significantly improved colouring result of the skin.
