<p>An injectable polymer-lipid blend is provided. The drug-free blend may be used as an injectable substance for cosmetic or therapeutic purposes. The blend may be prepared from a chitosan-based material, fatty acid and phospholipid. The chitosan-based material may be a water soluble chitosan derivative. The fatty acid may be a fatty acid or a fatty aldehyde, such as laurinaldehyde, having an acyl chain length of C8-C16. The Theological properties of the blend relates to the ratio of the components and to the acyl chain length of the fatty acid. The injectable system when drug-loaded is well suited for the delayed release of pharmaceutically active agents in the treatment of cancer and other diseases requiring localized drug delivery.</p>
