Double-emulsion encapsulation system for co-delivering micronutrients in vegan beverages

Overview

This solution is a water-in-oil-in-water (W/O/W) double emulsion encapsulation system designed to functionalize low-pH plant-based beverages by co-delivering lipophilic and hydrophilic micronutrients. Stabilized with saponin, the system targets beverages in the pH range of 2.7–3.2, such as Hibiscus sabdariffa drinks. It addresses a key challenge in the plant-based beverage market: delivering heat-sensitive and chemically diverse bioactives without compromising flavor, stability, or shelf life. By enabling simultaneous encapsulation of incompatible nutrient types, this technology opens new product development opportunities for fortified vegan beverages, functional drinks, and nutraceutical delivery.

Technical specifications

• Double emulsion architecture (W/O/W): Enables co-entrapment of both water-soluble and oil-soluble micronutrients in a single delivery system.
• Saponin stabilization: Replaces or supplements protein-polysaccharide complexes (such as sodium caseinate with sodium alginate or sodium carboxymethyl cellulose) to improve stability across a broad range of physical conditions, including low pH.
• Prior encapsulation performance: Reported encapsulation efficiencies above 75% for co-entrapped iron and curcumin, with iron bioaccessibility of 72–75%.
• Thermal stability: Designed to withstand processing temperatures up to 96.1°C for at least 33 seconds.
• Shelf-life target: Engineered for stability of at least 6 months under low-pH beverage conditions.
• Organoleptic preservation: Formulated to maintain the taste, color, and sensory qualities of the host beverage.
• Planned characterization: Particle size, zeta-potential, emulsification activity, emulsion stability, morphology, environmental stability, rheological properties, simulated in vitro digestibility, encapsulation efficiency, and bioaccessibility.

Technology readiness level

The technology is at an early-to-mid stage of development. Proof-of-concept work has already demonstrated successful co-encapsulation of iron and curcumin with high efficiency and bioaccessibility using protein-polysaccharide stabilized W/O/W emulsions. Current and planned work focuses on introducing saponin as a stabilizer, optimizing the process for scalability, and validating extended shelf life (6–9 months) under low-pH beverage conditions. Additional validation through simulated digestion studies and comprehensive physicochemical characterization is underway to advance the system toward commercial readiness for functional vegan beverage applications.