Poster 1: Strategies to Substantiate Microbiome-Related Cosmetic Claims
Introduction: The human skin is colonized by a diverse microbial community of commensals and species, which fulfil several beneficial functions for their host. However, from a cosmetic point of view, skin microorganisms are also responsible for negatively perceived effects, such as body malodor. Since long, it is well known that the composition of the human axilla microbial community plays a key role in the formation of body odor. Technological progress in the field of gene sequencing and computerized data handling now allow the analysis of the complete microbiome instead of just single species investigations.
Poster 2: Assessment of Anti-Pollution Effects for Two Antioxidants and a Chelator In Vitro and In Vivo on Human Skin by Use of the Cigarette Smoke Model
Introduction: Skin damage arising from pollutants as gases and particulate matter is mainly mediated by oxidative stress. The pollutants directly or indirectly generate free radicals on and in the skin, leading e.g. to MMP upregulation and damage of collagen fibers. The mechanisms seem to be similar to those of UV light . Particulate matter e.g. from combustion smoke, usually contains heavy metals, metal ions, and organic toxins, which further promote the generation of free radicals on the skin. Antioxidants and chelators are used in anti-pollution cosmetics to reduce the harmful effects of free radical generation. In this study we investigated the efficacy of two antioxidants and one chelator in an anti-pollution cigarette smoke model. Free radical generation was measured directly after UV and cigarette smoke exposure on pig skin (slaughterhouse waste), by use of Electron Spin Resonance (ESR) in vitro. ESR was also used to measure the Copper-chelation activity of the test products. After cigarette smoke application in vivo, two markers of lipid peroxidation were measured from swab solutions taken from the smoke exposed skin sites .
Poster 3: A Method to Determine Anti-Static Effects of Hair Cosmetics
Introduction: During the cold winter season, ambient conditions are dry and many people experience the effect of „flying hairs“. Hair surface usually is negatively charged . Due to friction (drying, combing), increased charge develops between hair fibers which is leading to an electrostatic repulse [2, 3]. The hair starts „flying“ , sizzling and sticking to head and face. These effects mainly occur in fine, medium long to long hair with a certain degree of hair damage  or in specific ethnicities like Caucasians .
There are many hair products that are marketed to counteract this uncomfortable effect. Only little work exists that describes this anti-static efficacy of cosmetics and only few methods exist to measure the electrostatic charging of hair fibers . Up to now, the efficacy assessed by instrumental measurements was not yet compared with visual perception and consumer perception.