New Insight for Enhanced Topical Targeting of Caffeine for Effective Cellulite Treatment: In Vitro Characterization,...

Area of Science:

• Nanotechnology
• Dermatology
• Cosmeceuticals

Background:

• Cellulite (CLT) is a common cosmetic concern affecting post-adolescent women.
• Current treatments like liposuction and mesotherapy are invasive and risky.
• Topical treatments are preferred, but caffeine's (CA) hydrophilicity limits skin penetration.

Purpose of the Study:

• To develop solid lipid nanoparticles (SLNs) for enhanced topical delivery of caffeine (CA).
• To evaluate the anti-cellulite efficacy of CA-loaded SLNs incorporated into a hydrogel formulation (CA-SLN-Ngel).

Main Methods:

• Caffeine was loaded into SLNs using high shear homogenization and ultrasonication.
• Formulation variables were optimized for entrapment efficiency, particle size, zeta potential, and polydispersity index.
• CA-SLN-Ngel was prepared and its physical properties, in vitro release, and histological effects on subcutaneous fat tissue were assessed.

Main Results:

• Optimized CA-SLNs (CA-SLN-4) achieved high entrapment efficiency (92.03%), small particle size (232.7 nm), and optimal zeta potential (-25.15 mV).
• CA-SLN-4 exhibited superior caffeine release (99.44% at 1h) and demonstrated successful transepidermal permeation.
• CA-SLN-Ngel significantly reduced subcutaneous fat tissue thickness compared to caffeine gel and untreated groups.

Conclusions:

• Solid lipid nanoparticles effectively enhance caffeine's skin delivery and anti-cellulite effects.
• CA-SLN-Ngel represents a promising nanocosmeceutical gel for topical cellulite treatment.
• The study highlights the importance of skin appendages for effective topical drug delivery.