Influence of nanoencapsulation on the sensory properties of cosmetic formulations containing lipoic acid

Abstract

Sensory analysis has become a valuable tool in qualifying consumer perception regarding cosmetic products. This study aims to explore the application of discriminative and affective consumers sensory analysis in evaluating the influence of nanoencapsulation on the sensory properties and rheological characteristics of a cosmetic formulation containing lipoic acid. The nanocapsules were prepared by the pre-formed polymer precipitation method. Semisolid formulations were prepared using a silicone emulsion system, and these pseudoplastic fluids were characterized using rheological methods. The panellists (n = 88) analysed the formulations with and without nanoencapsulated lipoic acid as paired comparisons within the discriminative and affective sensory analysis. In these measurements, spreadability, stickiness, oiliness and sulphur odour were evaluated. The panellists had no previous training in conducting these measurements. It was shown that nanotechnology can change some sensory characteristics of the formulations. The spreadability, stickiness and oiliness are the attributes for which the panellists noted differences with statistical significance. The spreadability difference could be due to the results found in the rheological profiles and consistency indexes between formulations. In the discriminative analysis, the panellists could not detect any noticeable differences in the sulphur odour or residual properties between samples, attributes that would influence whether consumers adhered to the selected treatment. Considering affective analysis, the consumers communicated that the formulation containing the nanoencapsulated lipoic acid, which presented less consistency, was preferred based on the reduction in immediate stickiness and residual sulphur odour. The free lipoic acid formulation was preferred in terms of residual oiliness and spreadability.

Preliminary study on the development of an antistretch marks water-in-oil cream: ultrasound assessment, texture analysis, and sensory analysis

“…Moreover, the different texturizing excipients reveal different texture properties and show the importance of the choice of excipients in order to obtain an appropriate cosmetic product. 15 , 31 …”

“…Sensory analysis represents a valuable tool in qualifying consumer perception, regarding a cosmetic product. 15 Sensory evaluation provides helpful input to formulators and supports them to improve the texture properties of the cosmetic product. The sensory panel consisted of 22 volunteers aged from 22 years to 34 years.…”

Rheology, clinical efficacy and sensorial of a silicone-based formulation containing pearl extract

“…After application, silicones can contribute to skin smoothness, provide luster or a matte appearance, add a perception of moisturizing, impart lubrication without tackiness, or give a soft, dry, even powdery feel (3) . Sensory properties are the first contact that consumers have with cosmetic products, and according to Kül-kamp-Guerreiro et al (8) , they relate such properties to product efficacy. In this sense, silicone-based formulations claim to have occlusive properties without oily feeling, and taking into account silicone sensory properties, consumers consider that silicone-based formulations have skin hydration properties.…”

Stability of Sun Creams Formulated with Thermal Spring Waters from Ourense, Northwest Spain

“…Some of the panelists (14%) knew some of the techniques, although the evaluation by untrained panelists has also been used [54]. This evaluation was proposed as a consumer test for the five mineral waters used and the cream with distilled water was used as control.…”