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In page Phospholipid:

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Common sources of industrially produced phospholipids are soya, rapeseed, sunflower, chicken eggs, bovine milk, fish eggs etc. Phospholipids for gene delivery, such as distearoylphosphatidylcholine and dioleoyl-3-trimethylammonium propane, are produced synthetically.[citation needed] Each source has a unique profile of individual phospholipid species, as well as fatty acids, and consequently differing applications in food, nutrition, pharmaceuticals, cosmetics, and drug delivery.[citation needed]