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Section: Research > Literature/Data

Technically Speaking--Acid-type Hair Color

Ajinomoto Co. Inc. discloses an inflammation inhibitor containing the zinc salt of acylamino acid intended to provide a good texture in use on skin.

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Is Your Microbiology Lab FDA-compliant? Part II: Cultures, Growth Media, Reagents and Testing

This two-part article provides an overview of areas relevant to the U.S. Food and Drug Administration’s (FDA’s) inspection of cosmetic microbiology laboratories. Part 1 covered personnel, facilities and equipment, test materials and procedures, and documentation. Part 2 addresses microbial cultures and growth media, biochemical reagents, test procedures and more.

[podcast] Biggest Consumer Concerns in Hair

"Today’s concerns are the same as they always have been," says Trefor Evans, Ph.D. "Although every now and then, a new attribute comes along." Learn more in this exclusive podcast and at the TRI-Princeton International Conference on Applied Hair Science.

Vitamin D Supplement

[Review] Vitamin D's Role in Hair Loss

The literature review provides a brief overview of vitamin D biology within the hair follicle, its role in etiopathogenesis and the rationale for supplementation in various alopecias.

Hair Ethnicity and Ellipticity: A Preliminary Study

Ethnic hair care addresses diverse fiber compositions that require unique products. This comprehensive review in hair fiber dimensions among straight, wavy and curly/coily hair serves as a basis from which product developers can design products to cater to unique hair type needs. The current study examines the ellipticity of Caucasian, Brazilian, Hispanic and African-American hair.

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Industry Insight: Antibacterial Functionality Enters Hair Care

In this "Industry Insight," Lisa Marie Garcia (LMG), president of innovation, and Roy Joseph, Ph.D., chief scientific officer and vice president of R&D, both of Farouk Systems, discussed changes in the hair care market in light of the pandemic and their company’s antibacterial line. Following is an excerpt adapted from our discussion.

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How Stress Depletes Melanocytes, Turns Hair White

Work recently published in the journal Nature explains why exposure to high levels of stress can cause hair to turn white.

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Patent Pick: Binding Agreement for Hair Repair

MIT inventors have filed for a patent on a newly identified molecule to help protect and/or repair damaged hair, and color hair without the use of harsh chemicals.

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Tightly Curled Hair Thermo-regulates Solar Radiation

A study published in The FASEB Journal explored the theory that scalp hair evolved to protect the thermo-sensitive human brain from solar-radiated heat. Results confirmed this function and identified tightly curled hair as the best-performing.

Alison Pawlus, Ph.D., Aveda/The Estée Lauder Companies

[podcast] Senescence to Understand Aging in Hair

Aging is a common denominator across not just cultures but substrates. Here, Alison Pawlus, Ph.D., of Aveda, describes a test based on cell senescence to measure the effects of aging in hair and identify ways to mitigate them. Listen now!

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Health and Hair: Making the Nutrition Connection

The links between skin and overall health are well-documented, but connections to hair health are less clear. Here, the authors delve a little deeper to determine truths and myths in this area—and to identify current gaps in the research.

Girl applying oil to hair

Camellia Seed Cake Extract Promotes Hair Growth

Camellia seed cake extract promotes hair growth on human dermal papilla cells.

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Patent Pick: Aesthetic Volumizing Spray Hair Powder

Henkel inventors have designed a hair powder spray to impart volume and a sense of softness to hair. A new patent application explains.

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Editor’s Note: New Frontiers in Hair Follicles

Could the exosome be a new frontier for healthy hair? What about “growing” benefits within the fiber itself? These advances suggest hair is not as “dead” as we thought; or at the very least, the living portion can be influenced. This issue is focused on textured hair treatments and biology, emotional ties to hair, low-water surfactants, water resistance vs. rheology and more.

Hair Ethnicity and Ellipticity: A Preliminary Study

Ethnic hair care addresses diverse fiber compositions that require unique products. This comprehensive review in hair fiber dimensions among straight, wavy and curly/coily hair serves as a basis from which product developers can design products to cater to unique hair type needs. The current study examines the ellipticity of Caucasian, Brazilian, Hispanic and African-American hair.

How Hair Smells Sandalwood Study Update

Study Update: Sandalore Ingredient Reverses Hair Loss

In a study update, Symrise reported its Sandalore ingredient was clinically shown to prevent hair loss in women more effectively than a sandalwood oil control.

Is Cosmetics Science Really "Bad"? Part III: Evidence to Support Claims in the Real World

This is the third column of a series that applies Michael Shermer's "Baloney Detection Kit" to cosmetic science. This column tackles the fourth, fifth and sixth of ten core questions included in the "kit": those relating to claims substantiation.

The authors conclude, 'Our findings explain how the skin’s surface prevents excessive inflammation through ZNF750- and KDM1A-mediated suppression of PRRs.'

Why is Some Skin Prone to Inflammation, or Not? New Research Points to ZNF750.

Notably, as keratinocytes become differentiated, they move toward the skin's surface and, simultaneously, express much less PRR. This process diminishes immune responses, the researchers argue.

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