Liposomal Vitamin A: Emerging Trends in Nanometric Delivery, Manufacturing, and Therapeutic Outcomes

Vitamin A is an essential fat-soluble micronutrient critical for vision, immune function, and skin health. It degrades rapidly when exposed to light, heat, or oxygen. Its lipophilic nature makes it vulnerable to first-pass hepatic metabolism. Traditional oral delivery forms result in poor bioavailability. This review explores liposomal encapsulation as a strategy to overcome these barriers. Embedding Vitamin A in phospholipid bilayers significantly enhances its stability. Liposomes shield the retinoid from harsh gastric conditions and enzymatic degradation. Absorption is facilitated through biomimetic membrane interaction and lymphatic transport pathways.

The review examines the formulation chemistry of liposomal Vitamin A in detail. The lipophilic retinoid is partitioned into the hydrophobic tail region of the bilayer. Manufacturing technologies, including high-pressure homogenization and thin-film hydration, are evaluated. Particle size is maintained between 50 and 150 nm for optimal bioavailability. Zeta potential is kept above ±30 mV to ensure colloidal stability. In nutrition, liposomal delivery enables lymphatic absorption, effectively bypassing the liver. It also supports bone-targeted therapy and benefits patients with malabsorption. In dermatology, controlled release mitigates retinoid dermatitis and enables deep follicular penetration.

WBCIL’s proprietary LipoEdge™ technology produces nanometric vesicles ranging from 50 to 150 nm. Encapsulation efficiency exceeds 70% for lipophilic compounds like Vitamin A. Manufacturing is conducted under inert gas and controlled lighting conditions. This protects the light-sensitive retinoid during the emulsification process. LipoEdge™ formulations are designed to resist leakage and aggregation. Comparative studies confirm a 2.36-fold increase in relative bioavailability.