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Sun Care
New in Sun Care (page 2 of 8)
Feb 02, 2012 | 09:54 AM CST
Gauging UV Light Exposure to Reduce Vitamin D Deficiency
By: Jack Surrette, SkinHealth Technology LLC
Vitamin D is critical to human health and the best source is from natural UVB light. However, contrary to the benefits gained are the well-documented damaging effects of sun exposure. In response, described here as a complementary approach to sun care is the development of an accurate gauge of UV exposure to produce optimum levels of vitamin D before sunburn results.
Feb 02, 2012 | 09:43 AM CST
Developing Sunscreens for the Preventive Treatment of Photodamage and Premature Aging
By: Linda D. Rhein, PhD Fairleigh Dickinson Unive…
This article reviews the mechanisms of ultraviolet radiation insult to skin and explains the formulation of sunscreens to protect against this damage. Further, since the efficacy of combinations of UV filters will vary with formulation base, the formula vehicle and form are discussed, as well as an overview given of typical sunscreen efficacy tests performed prior to production.
Feb 02, 2012 | 09:35 AM CST
Ingredient Profile—Ethylhexyl Methoxycinnamate
By: Michael J. Fevola, PhD, Johnson & Johnson
Ethylhexyl methoxycinnamate (EHMC) is among the most frequently used organic ultraviolet (UV) filters, known primarily for its role as an active ingredient in sunscreen products.
Oct 05, 2011 | 11:49 AM CDT
Antioxidants in Sunscreens for Improved ROS Protection
By: Kerry Hanson and Christoper Bardeen, Universit…
In the present article, sunscreens containing the antioxidants vitamin E and diethylhexyl syringylidene malonate were tested for their efficacy in preventing UV-induced reactive oxygen species in the lower stratum corneum. The addition of the antioxidants was found to significantly improve the ability of low to high SPF sunscreens to attenuate ROS formation in UV-exposed skin.
Sep 01, 2011 | 01:34 PM CDT
Ingredient Profile—Ascorbic Acid
By: Michael J. Fevola, PhD, Johnson & Johnson
L-Ascorbic acid (AscA), more commonly referred to as vitamin C, is best known for its vital role in human health and nutrition, where it functions as a cofactor in enzymatic reactions, such as collagen synthesis, and as an antioxidant.
Jun 01, 2011 | 01:31 PM CDT
The Effects of Solvents on Sunscreens: A New Ester to Improve Efficiency
By: Thomas O’Lenick, PhD, SurfaTech Corp.; and Den…
The present paper evaluates the effects of solvent systems on the in vivo SPFs of sunscreen formulations. Formulations incorporating identical active systems were prepared using traditional solvent systems and varying concentrations of sorbeth 2 hexaoleate, a new ester having both polar and nonpolar segments. Results indicate the ester enhances SPF in a dose-dependent manner.
Jun 01, 2011 | 01:26 PM CDT
Ingredient Profile: Titanium Dioxide
By: Mike J. Fevola, Johnson & Johnson
While TiO2 is often incorporated as a colorant and an opacifier in cosmetics and personal care products, its most important applications are as a sunscreen active and as a component of specialty pigments for color cosmetics.
Mar 02, 2011 | 03:36 PM CST
A Melanin Derivative to Shield the Skin from High Energy Visible Light
By: N. Dayan, PhD, Lipo Chemicals Inc.; A. Ballant…
High energy visible (HEV) light recently has been suspected of causing as much damage as UVA and UVB combined. Thus, the present paper describes a fractionated melanin tailored to absorb light in the visibile 400–500 nm range. In addition, because the material exhibits color, the authors focus on formulation techniques to incorporate it into semi-solid formulations.
Jan 03, 2011 | 02:18 PM CST
Photostabilization of Retinol and Retinyl Palmitate by Ethylhexyl Methoxycrylene
By: Craig Bonda and Jean Zhang, The HallStar Compa…
This study examines the photostability of retinol and retinyl palmitate, finding they break down rapidly when exposed to UV radiation in the 290–400 nm range. This severely reduces their concentrations in finished formulations. However, when combined with ethylhexyl methoxycrylene, these retinoids are shown to be protected against photodegradation, thus preserving their concentrations both during the manufacturing process and following application to the skin.
Sep 01, 2010 | 10:41 AM CDT
Silicon Microspheres as UV, Visible and Infrared Filters for Cosmetics
By: Isabelle Rodriguez, PhD, Roberto Fenollosa, Ph…
Silicon microspheres are described as UV, visible and infrared (IR) radiation filters. Parameters of these spheres including shape, smoothness, refractive index and size are examined for their potential benefits in cosmetic formulations. Finally, the ability of the spheres to block IR radiation is evaluated for thermo-regulatory effects.