| abstract |
The present invention provides a cosmetic material, a bathwater additive and a pharmaceutical composition containing chitin nanofibers or chitosan nanofibers. Preferably, the chitin nanofibers are produced according to a method characterized in that chitin-containing biological materials are submitted to at least one deproteinization step and at least one decalcification step, and then submitted to a defibration step; the widths of the fibers are approximately 2 nm to approximately 200 nm; and the fibers are extended chain crystals. Preferably, the chitosan nanofibers are produced according to a method characterized in that chitin-containing biological materials are submitted to at least one deproteinization step, at least one decalcification step, and at least one deacetylation step, and then submitted to a defibration step; the widths of the fibers are approximately 2 nm to approximately 200 nm; and the fibers are extended chain crystals |