What level of photoprotection can be obtained using facial mask? Determining effectiveness using an in vitro method.

It has become a general practice worldwide to wear a face mask serving as a barrier against the transmission of pathogens. This has prompted us to investigate whether masks could also protect our skin from UV radiation. We have studied eight masks, four surgical and four "homemade" using an in vitro method.

Demonstration of the dangerous nature of 'homemade' sunscreen recipes.

Background: Following a growing mistrust in a certain number of ingredients used by the cosmetic industry, it has become popular in recent years for consumers to make their own products at home. This trend now touches on all areas of the industry, but is especially found in the hygiene sector, with shampoos and toothpaste, and the care sector, with moisturizers and sunscreen, products.

Objectives: The objective of this study is to analyze sunscreen recipes found on the Internet and to assess their level of photoprotective efficacy.

Evaluation of Different Colorless Nail Polishes Used as Supportive Care in Patients with Cancer in Terms of Photoprotective Efficacy and Water Resistance.

In patients undergoing chemotherapy, the application of nail polish and/or a colorless base coat is recommended in order to prevent the adverse effects that can occur on the nails throughout treatment. In this study, the photoprotective effects of different clear nail polishes were examined. Twelve commercially available, colorless nail products were tested .

[Comparison of different nail polish in terms of photoprotective efficacy. Interest of their use as supportive care in patients with cancer].

Many different chemotherapy drugs including cytotoxics and docetaxel in particular are responsible for side effects involving the nails. To prevent these negative effects, patients are advised to apply nail polish. The aim of this article is to study the photoprotective effect of various products applied in two layers.

BB creams and their photoprotective effect.

BB creams appeared on the market quite recently. These creams, which give a perfect complexion by covering up the skin's blemishes, have a photoprotective effect in the majority of cases. An SPF value ranging from 10 to 45 concerning the products we tested is displayed on the packaging.

UV filters, ingredients with a recognized anti-inflammatory effect.

Background: To explain observed differences during SPF determination using either an in vivo or in vitro method, we hypothesized on the presence of ingredients having anti-inflammatory properties.

Methodology/principal Findings: To research our hypothesis, we studied the 21 UV filters both available on the market and authorized by European regulations and subjected these filters to the phorbol-myristate-acetate test using mice. We then catalogued the 13 filters demonstrating a significant anti-inflammatory effect with edema inhibition percentages of more than 70%.

Influence of certain ingredients on the SPF determined in vivo.

When determined in vitro, the SPF of certain commercial sunscreen products can be lower than the SPF indicated on the label. The study of the composition of this type of product enabled us to note that the majority contained substances reputed to have anti-inflammatory properties. This effect is shown by inhibiting the erythema, without protecting the skin, which constitutes a serious public health problem.

Silymarin, a molecule of interest for topical photoprotection.

Some UV-filters have side effects. For example, oestrogenic effect was demonstrated for 4-methylbenzylidene camphor. Given that secondary metabolites are known for their UVB photoprotective properties in plants that contain them, we chose to study silymarin as an agent which could potentially be used in sun products.

Foundations and self-tanning products: Do they provide any protection from the sun?

As soon as the weather turns sunny, everyone wants a tan. People with skin phototypes III and IV, called melanocompetent, have no problem meeting this fashion requirement. But things are quite different for people with phototypes I and II and so these individuals look for alternative solutions.

Flavonoids and polyphenols, molecular families with sunscreen potential: determining effectiveness with an in vitro method.

The numerous uses and properties of flavonoids are well known, in particular their antioxidant, cancer-control and antiinflammatory effects. These properties can be used to enrich the field of topically-applied sun protection. The aim of the study was to determine the effectiveness of various flavonoids and polyphenols.

Interest of ferulic acid ethyl ester in photoprotective creams: measure of efficacy by in vitro method.

Topical sunscreens have been used for many years on exposed areas to protect the skin from the damaging effects of ultraviolets. If the sunscreens were essential, it is suggested that they have adverse effects. We chose to study ferulic acid ethyl ester (FAEE) as agent which could potentially be used in sunscreen products.

Quercetin and rutin as potential sunscreen agents: determination of efficacy by an in vitro method.

Given that flavonoids are known for their ultraviolet (UV)B photoprotective properties in plants that contain them, we chose to study quercetin (1) and rutin (2) as agents that could potentially be used in sunscreen products. These two substances proved to behave in similar ways. When incorporated in oil-in-water emulsions, at a concentration of 10% (w/w), 1 and 2 give sun protection factor (SPF) values similar to that of homosalate, a standard substance.

Photoprotective activity of propolis.

The purpose of this study was to determine the photoprotective properties of propolis. The sun protection factor (SPF) of ethanol extract of propolis was evaluated by an in vitro method, using homosalate as control. This determination is based on the physical determination of the reduction of the energy in the UV range, through a film of product which has previously been spread on an adequate substrate.

Study of the photostability of 18 sunscreens in creams by measuring the SPF in vitro.

The target of this research was to evaluate the photostability of various sunscreen agents incorporated into an O/W emulsion. The concept of photostability is very important in the field of solar protection. The effectiveness of the anti-solar products is quantified using a universal indicator: the sun protection factor (SPF).