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Photobiology

Outdoor sunscreen testing with high-intensity solar exposure in a Chinese and Caucasian population.

The ability of a sunscreen to prevent ultraviolet (UV)-induced erythema and pigmentation is assessed following the international validated indoor in vivo methods of sun protection factor (SPF) testing1 (a measure of UVB protection) and UVA protection factor (UVAPF).2 Of these, the SPF value is probably the most widely recognized and widely used measure of protection level. However, the testing methods use solar UV simulators that differ from real sunlight both in irradiance—the irradiance is higher than that of sunlight to avoid the need for prolonged exposure—and spectrum.

Author(s): Corinne Granger

Date: 4 March 2022
Publish: 22 June 2021
Skin Care

Antioxidant and Anti-Aging Potential of Indian Sandalwood Oil against Environmental Stressors In Vitro and Ex Vivo.

Distilled from the heartwood of Santalum album, Indian sandalwood oil is an essential oil that historically has been used as a natural active ingredient in cosmetics to condition and brighten the skin. It has been documented to exhibit antioxidant, anti-inflammatory, and anti-proliferative activities. Here, we investigated the protective and anti-aging effects of Indian sandalwood oil in scavenging reactive oxygen species (ROS) in HaCaT cells and in human skin explants after exposure to oxidative stress.

Author(s): Véronique Francois-Newton

Date: 4 March 2022
Publish: 19 June 2021
Hair Care

Evaluation of the efficacy and tolerance of a cosmetic mask containing 89% of vichy volcanic mineralizing water and hyaluronic acid after facial laser procedures.

The number of dermatological or cosmetic procedures has continuously increased over the last decades. The main population requesting dermatological procedures are women over the age of 40 (92%). Dermatological procedures, including ablative and nonablative fractional lasers, microneedling, radiofrequency, microfocused ultrasound, and intense pulsed light, are mainly performed on the face and may result in transient local side effects, such as erythema, blistering, crusts, scaling, hypo- or hyperpigmentation, or hemorrhagic lesions. They may even alter the natural skin barrier.

Author(s): Paulo Torreao MD

Date: 4 March 2022
Publish: 03 February 2021
Nail Care

Pigmentation effects of blue light irradiation on skin and how to protect against them

Solar radiation, in particular ultraviolet radiation (UVR), is still considered to be the main cause of skin ageing, a phenomenon known as photoageing [1, 2]. However, for a couple of years now, visible light, with a wavelength of 400–700 nm and accounting for around 50% of all solar radiation, has come into focus as an additional contributor to photoageing. More specifically, high energy visible (HEV) light, commonly referred to as blue light – with a wavelength of 400–500 nm adjacent to UVA light – has been shown to induce signs of cutaneous photoageing in vitro, ex vivo and in vivo

Author(s): R. Campiche

Date: 4 March 2022
Publish: 01 June 2020
Blue Light

A novel method for evaluating the effect of pollution on the human skin under controlled conditions.

Generally considered as a major risk factor for various respiratory diseases, air pollution can also have a significant impact on the skin. To date, there is a plethora of cosmetics products with “anti-pollution” claims. However, these claims have not been fully substantiated with robust scientific evidence and currently there is no standardized method in place for validating the anti-pollution efficacy of cosmetics products.

Author(s): Seerooven Curpen

Date: 4 March 2022
Publish: 01 August 2019
Pollution

New Methodology to Evaluate Sunscreens Under Outdoor Conditions: A Double-Blind, Randomized Intra-Individual Clinical Study of a Water-Based Broad-Spectrum SPF50+ Versus SPF15 (P3) and SPF50+

This study explored a new method to test sunscreens in outdoor conditions (very high to extreme ultraviolet [UV] radiation) approximating real-life solar exposure while maintaining scientific standards and acceptable conditions, and assessed the efficacy of a water-based sun-protection factor (SPF) 50+ versus a reference SPF15 and two comparator SPF50+ products.

Author(s): Jean Krutmann

Date: 4 March 2022
Publish: 27 July 2019
Skin Care

A randomized study to evaluate the efficacy and effectiveness of two sunscreen formulations on Indian skin types IV and V with pigmentation irregularities.

India is geographically located in Asia; however, describing Indian skin as Asian skin or skin of color may not be accurate. Indian skin color is diverse with Fitzpatrick phototypes varying from III in North India to VI in South India, with the majority of population having phototypes IV (28° < individual typological angle <10°) and V (10° < individual typological angle < −30°). The latitude and environmental conditions have a great impact on the Indian skin color.

Author(s): Rashmi Sarkar

Date: 4 March 2022
Publish: 29 October 2018
Skin Care

Clinical Efficacy of a Novel Two-Part Skincare System on Pollution-Induced Skin Damage.

Increased awareness of the hazardous consequences of air pollution has led to global efforts to reduce air pollution and improve air quality. Air pollution is a serious issue for overall public health as it has been linked to ~7 million deaths annually, primarily through cardiovascular and pulmonary diseases. As such, it is the world’s largest environmental health risk putting it in the same league with other health risks including smoking, high cholesterol and obesity.1 Air pollution also has aggravating effects on skin conditions and diseases such as atopic dermati- tis.

Author(s): Elizabeth T. Makino BS MBA

Date: 4 March 2022
Publish: September 2018