Biology

Recent in Biology (page 9 of 28)

Potential Differences in Percutaneous Penetration, Barrier Function Between Individuals of Different Ethnicity or Skin Color

The current understanding of percutaneous penetration and parameters that can influence it remains a sub judice area. Ethnicity or pigmentation, for instance, can be implied in percutaneous absorption for which several studies, described here, have been conducted to clarify their roles.

Variations in Pigmentation and Ultrastructural Skin Differences Among Ethnic Groups*

As formulators create products for varying ethnic backgrounds and with diverse skin types, an understanding of differences in pigmentation and skin structure and function becomes more important. This column reviews recent studies on the structural, genetic and ultraviolet (UV)-responsive differences in skin pigmentation to allow the formulator to create successful products for varying ethnicities and to accurately measure pigmentation.

Enhancing Sunscreen Efficacy for Realistic Application

The ability of a sunscreen to protect the skin from erythema is expressed on product labels as the sunburn protection factor (SPF)—i.e., the ratio of the minimum erythema dose (MED) with sunscreen to the MED without protection. Yet in reality, consumers do not apply the same mass/cm2 as is utilized in SPF testing, so maximal protection is not achieved.

Researchers Identify Vitiligo Cause and Compound for Hair/Skin Repigmentation

Researchers from the University of Bradford and E.M. Arndt University of Griefswald have hypothesized the cause of vitiligo by repigmenting hair/skin with a compound activated by UVB oxidation. Although this treatment was developed as an answer for those suffering with vitiligo, it may also serve as an intervention for aging hair.

Interpersonal Hormone Transfer and Cosmetic Contact Allergens

It is possible that the transdermal transfer of applied hormones is of clinical relevance to personal care products. An estimated 1–3% of the population is allergic to a cosmetic product or ingredient contained therein.

Gauging UV Light Exposure to Reduce Vitamin D Deficiency

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.

Consumer Perspective: Achieving an Even Skin Tone

Consumers are becoming more aware of the evenness of their skin tone, and it has become an important concern. Consequently, the primary focus of anti-aging skin care has shifted from reducing wrinkles to evening out skin pigmentation

Molecular Targets of Aging Processes

The purpose of this article is to discuss some key target molecules and receptors involved with aging mechanisms. As scientists learn more about the biochemical processes involved with aging, an increasing number of these loci are discovered that could be selected as targets for cosmeceutical ingredients with the final goal of an end-product with good anti-aging benefits.

Molecular Targets of Aging Processes

The purpose of this article is to discuss some key target molecules and receptors involved with aging mechanisms. As scientists learn more about the biochemical processes involved with aging, an increasing number of these loci are discovered that could be selected as targets for cosmeceutical ingredients with the final goal of an end-product with good anti-aging benefits.

Types of Skin Aging

The process of skin aging is complex and multifactorial, as structural, functional and aesthetic changes happen at a variable rate. It is misleading to consider skin aging as a uniform biological event; several distinct biological processes may occur concurrently. There are five types of skin aging, including: intrinsic, extrinsic, lifestyle, hormonal or catabolic.

Types of Skin Aging

The process of skin aging is complex and multifactorial, as structural, functional and aesthetic changes happen at a variable rate. It is misleading to consider skin aging as a uniform biological event; several distinct biological processes may occur concurrently. There are five types of skin aging, including: intrinsic, extrinsic, lifestyle, hormonal or catabolic.

Unexpected Lessons in Dermatotoxicology: De minimis Magnesium++

Traditional dermatotoxicologic investigations focus on dermatitis as well as potential systemic effects but rarely have they focused on trace ions. The following lesson opens new avenues of thought and investigation for intimate care product developers, since the trace ions described may dramatically impact the end product.

Can't find what you're looking for? Try searching, or looking through past issues.