Shelf life of microcapsules, liposomes prepd. from natural lipides is greatly increased by organism-compatible anti-oxidant systems. Constituents of these systemsa comprise water and/or lipid soluble cpds. with antioxidant characteristics e.g. histidine or histidine contg. di:peptides, their salts and/or alpha-tocopherol. This antioxidant system has a wide field of application
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