Enzymatic Interesterification: An Innovative Strategy for Lower-Calorie Lipid Production From Refined Peanut Oil

Area of Science:

• Food Science and Technology
• Lipid Chemistry
• Nutritional Biochemistry

Background:

• Growing consumer demand for healthier food options necessitates the development of lower-calorie ingredients.
• Peanut oil's fatty acid profile can be modified to alter its nutritional properties.
• Enzymatic interesterification offers a targeted approach to lipid modification.

Purpose of the Study:

• To evaluate the fatty acid (FA) composition of refined peanut oil (RPO).
• To assess the impact of enzymatic interesterification on the regiodistribution of FAs in triacylglycerols (TAGs).
• To produce modified lipids with reduced digestibility and caloric value.

Main Methods:

• Analysis of FA composition and sn-2 TAG distribution using Gas Chromatography-Mass Spectrometry (GC-MS) and Thin-Layer Chromatography/GC-MS (TLC/GC-MS).
• Determination of acidity by titration and TAG content by High-Performance Size-Exclusion Chromatography (HPSEC).
• Enzymatic interesterification of RPO using TL-IM lipase to create the modified oil (CP-10).

Main Results:

• Refined peanut oil (RPO) had 16.98% saturated (SFA), 75.78% monounsaturated (MUFA), and 7.25% polyunsaturated (PUFA) FAs.
• Enzymatic modification (CP-10) significantly altered sn-2 FA distribution, increasing SFA content (34.67%) and specific SFAs.
• The modified oil (CP-10) exhibited a 10.6% reduction in in vitro digestibility compared to RPO.

Conclusions:

• Enzymatic interesterification is an effective strategy for modifying peanut oil's lipid structure.
• Structural changes lead to reduced digestibility and lower caloric content, enhancing nutritional value.
• This approach supports the development of healthier food products aligned with consumer health trends.