Edible lipid nanoparticles: digestion, absorption, and potential toxicity

Area of Science:

• Food Science and Technology
• Nanotechnology
• Toxicology

Background:

• Food-grade nanoemulsions, featuring lipid nanoparticles (radius <100 nm), are increasingly used in the food industry.
• They serve to encapsulate and deliver hydrophobic compounds like flavors, colors, vitamins, and nutraceuticals.
• Their physicochemical properties can be tailored through ingredient selection and fabrication methods.

Purpose of the Study:

• To provide an overview of the biological fate of food-grade lipid nanoparticles.
• To assess the potential toxicity associated with these nanoparticles in food applications.
• To inform the safe utilization of nanoemulsions in the food and beverage sector.

Main Methods:

• Review of current scientific literature on food-grade lipid nanoparticles.
• Analysis of studies concerning nanoemulsion composition, fabrication, and characterization.
• Evaluation of research on the gastrointestinal fate and toxicological profiles of ingested lipid nanoparticles.

Main Results:

• Nanoemulsions offer advantages like enhanced stability, optical transparency, and bioavailability compared to conventional emulsions.
• Potential risks include altered gastrointestinal fate of bioactive components and toxicity from certain fabrication materials (surfactants, solvents).
• Physicochemical characteristics of lipid nanoparticles influence their biological behavior and safety.

Conclusions:

• Food-grade nanoemulsions present significant potential for ingredient delivery in food products.
• A thorough understanding of their biological fate and toxicological impact is crucial for safe application.
• Further research is needed to mitigate risks and ensure the safety of lipid nanoparticles in the food supply.