Deodorant Efficacy of Xylityl Sesquicaprylate Vehiculated into Roll-on and Stick Prototype Formulations

Abstract

Given the burgeoning global market for deodorant products, it is paramount to develop novel, safe, and efficacious molecules that align with the cosmetic industry’s trend toward active compounds sourced from natural, sustainable, and renewable sources. In this context, we in vitro and in vivo investigated the deodorant potential of xylityl sesquicaprylate, a compound that, besides other functions, has antimicrobial activity. We performed the time–kill test to challenge the xylityl sesquicaprylate against Staphylococcus epidermidis, Staphylococcus aureus, and Corynebacterium xerosis and in vivo trial efficacy was established through a sniff test using two deodorant prototype formulations containing xylityl sesquicaprylate at 0.35% (w/w). The xylityl sesquicaprylate at 0.35% (w/w) in glycerin presented in vitro deodorant activity through a bactericide/bacteriostatic profile against S. epidermidis, S. aureus, and C. xerosis. The in vivo efficacy trial performed by the sniffers through a single application of the roll-on and the stick prototype formulations added to the developed active compound deodorant’s effectiveness with a reduction in axillary bad odor, in comparison to the respective blank sample, for 2, 4, 8, and 12 h. When the deodorant efficacy was evaluated subjectively by the participants, there was always no difference between the stick sample and the blank; however, the roll-on deodorant was perceived as effective after 4 and 8 h of a single application of the sample, as established by the volunteers.

Keywords

• deodorant
• sniff test
• time–kill kinetic test
• xylityl sesquicaprylate