Oat fiber as a carrier for curcuminoids

Area of Science:

• Food Science
• Nutritional Science
• Biomaterials

Background:

• Curcuminoids exhibit poor aqueous solubility, limiting their bioavailability and application in functional foods.
• Oat fiber, rich in beta-glucan, presents a potential natural carrier for hydrophobic compounds.

Purpose of the Study:

• To investigate the potential of oat fiber as a carrier for curcuminoids.
• To assess the impact of oat fiber on curcuminoid solubility, stability, and physical state.

Main Methods:

• Preparation of curcuminoid-oat fiber dispersions in aqueous ethanol.
• Fractionation using centrifugation to separate supernatant and precipitate.
• Analysis of curcuminoid partitioning, solubility, and physical state (amorphous vs. crystalline).

Main Results:

• Curcuminoids were effectively carried by oat fiber, with near-equal partitioning between supernatant and precipitate fractions.
• Curcuminoid solubility was significantly enhanced in the oat fiber supernatant compared to aqueous ethanol and water.
• Curcuminoids in the precipitate were in an amorphous state and exhibited greater stability against degradation.

Conclusions:

• Oat fiber demonstrates significant potential as a carrier for improving curcuminoid solubility and stability.
• The findings suggest oat fiber can facilitate the incorporation of curcuminoids into functional food products.
• Amorphous state stabilization of curcuminoids within the oat fiber precipitate offers enhanced protection against degradation.