Solid Lipid Nanoparticles of Fenugreek Seed Extract in a Dermatological Base for Alopecia: An in Vivo Study

Abstract

Objective: The objective of the study was to investigate the potential of Solid Lipid Nanoparticles (SLN) of Fenugreek Seed Extract (FSE) in a dermatological base for its hair growth activity in alopecia Methods: The optimized SLN formulation of FSE was loaded into neutralized Carbopol 934 gel, and its hair growth efficacy was studied in Wistar rats in terms of hair density and length. Alopecia was induced in the rats by administering cyclophosphamide at a dose of 40 mg/kg for three days. The formulations were applied to the skin for twenty-one days following the induction of the disease. The hair growth in FSE-SLN gel-treated groups were compared with disease control and other treatment groups using qualitative and quantitative assessments. Results: FSE-SLN gel reduced the hair growth completion time comparable to that of the standard (p<0.01). The increase in hair length was significantly (p<0.01) greater in FSE SLN groups compared to groups treated with conventional gels, oils, and marketed formulations, demonstrating the superior hair growth efficacy of the developed FSE SLN. Conclusion: SLNs can enhance the penetration of extract into the skin (stratum corneum) compared to oil and gels, thereby increasing treatment efficiency, targeting the epidermis, and reducing systemic absorption and related side effects. Consequently, the developed nanoformulation can be a substitute for in vivo hair growth activity.