The present invention relates to a delivery system, and in particular to carboxylic acids for use as a delivery system of sensitive agents such as bioactive peptides. The carboxylic acids and salts can form non-covalent mixtures with biologically-active agents. These mixtures are suitable for oral administration...http://www.google.com/patents/US5541155?utm_source=gb-gplus-sharePatent US5541155 - Acids and acid salts and their use in delivery systems
