Sequential transformation of the structural and thermodynamic parameters of the complex particles, combining covalent conjugate (sodium caseinate + maltodextrin) with polyunsaturated lipids stabilized by a plant antioxidant, in the simulated gastro-intest

•The density of the complex particles is one of the key parameters for digestion•The elongated architecture of the complex particles facilitates the digestion•Decrease in the density of the complex particles facilitates the release of lipids•Composition of the GIT fluids has a great impact on the particle transformation•Thermodynamics of the pair particle interactions changes markedly in the GIT fluids

The present work is focused on the structural transformation of the complexes, formed between covalent conjugate (sodium caseinate + maltodextrin) and an equimass mixture of the polyunsaturated lipids (PULs): (soy phosphatidylcholine + triglycerides of flaxseed oil) stabilized by a plant antioxidant (an essential oil of clove buds), in the simulated conditions of the gastrointestinal tract. The conjugate was used here as a food-grade delivery vehicle for the PULs. The release of these PULs at each stage of the simulated digestion was estimated.

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