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Section: Research > Methods/Tools

Formulating Hair Conditioners: Hope and Hype

Hair conditioners are one of the most widely used products in the personal care arena.

Johann W. Wiechers, Ph.D.

Words from Wiechers: Bad Hair Day

This Words from Wiechers highlights the lack of formulations for segments of the population that have specific needs based upon hair or skin type. Presenting Wiechers's insights is Tony O'Lenick; Ali Syed, Ph.D., of Avalon Industries, shares additional expertise.

WomanResearcherMicrobePetriDishes850

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.

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Ingredients Leave Hair Irresistible & Skin Revived

Givaudan has launched a couple new ingredients. One ingredient helps enhance hair in a variety of ways, while the other ingredient benefits skin in a holistic way.

Measuring Hair Strength, Part II: Fiber Breakage

In the mechanical testing world, the tendency for materials to fail under a repeated stimulus is termed fatigue testing, and this article discusses this topic in relation to hair breakage. It will be shown that this alternative testing approach provides considerable insight into the cause of hair breakage, and subsequently allows for the identification of strategies for its minimization; it will also be demonstrated how learning this provides the underlying theory by which anti-breakage and even “strengthening” claims are crafted.

woman hiking mountains backpack using sunscreen

2025 Will See Faster, More Ethical and Accurate SPF Testing: ISO Approves Two New Methods

In December 2024, the ISO gave its long-awaited final approval of two SPF test methods that experts say are more ethical, economical and accurate than current approaches. One in particular is also reportedly faster, reducing analysis from weeks to days.

Measuring Hair Strength, Part II: Fiber Breakage

In the mechanical testing world, the tendency for materials to fail under a repeated stimulus is termed fatigue testing, and this article discusses this topic in relation to hair breakage. It will be shown that this alternative testing approach provides considerable insight into the cause of hair breakage, and subsequently allows for the identification of strategies for its minimization; it will also be demonstrated how learning this provides the underlying theory by which anti-breakage and even “strengthening” claims are crafted.

Beautiful Young Woman Fun Unicorn Hair Purple Blue Curly Feel Touch Soft

Testing Trending Hair Care and Skinification Claims

Various test methods, some borrowed from skin care, can be used to validate hair product claims. This article reviews several, including conditioning, anti-breakage, hydration, skinification-related, damage repair, anti-dandruff, anti-hair loss and more.

Johann W. Wiechers, Ph.D.

Words from Wiechers: Is Cosmetic Science Really 'Bad'? Part II: Scum of the Earth

This edition of Words from Wiechers debates: Are claims on cosmetic products exaggerated? While Wiechers presents strong points, column editor Tony O'Lenick believes that by and large, cosmetic companies are very conscious not to alienate consumers by making wild claims.

Ct Alles 2026 Portal Launch Chemist Orange Bright

2026 C&T Allē Awards Portal is Open — Beauty Innovation Abounds: Show Us Your Stuff

With beauty innovation abuzz, especially around spring trade shows, Cosmetics & Toiletries is excited to open the 2026 Allē Awards submission portal. Show us what you've got!

Johann W. Wiechers, Ph.D.

Words from Wiechers: In the Land of the Blind, the One-eyed Man is King

"Regulatory bodies claim that everything should be tested against a placebo, but they should also learn to see there is a difference between fundamental science and applied science," the late Johann Wiechers, Ph.D., writes, in this month's column. He also explains blinded studies.

L’Oréal Creates Carbon-neutral Hair Dye Plant

L’Oréal has turned its plant in Libramont, Belgium, into a carbon-neutral site using 100% green energy. L’Oréal Libramont utilizes a biomethane centre that was developed by Eneco and Bio Energie Europa, employing technology to transform biomass from local farmers and the agro-alimentary industry into methane gas, which provides electricity and heat to the plant.

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Oxygen Breathes Life Into Hair Regeneration Research

Oxygen-permeable silicone was the key to recent research in Biomaterials, developed in hopes to bring about new hair regeneration treatments.

The approach could be used to develop eco-friendlier products for hair strengthening and setting.

Green Method Using Blue Light Strengthens, Sets Hair

A paper published in the Journal of Cleaner Production describes the clean, one-step crosslinking of keratin to strengthen and set hair using blue light and eco-friendly chemicals such as citric acid.

The substrate could aid in hair loss treatment and may have broader applications for skin.

3D Bioprinted Hydrogel Enables Hair Follicle Regeneration

A recent paper published in Acta Biomaterialia describes a 3D bioprinted scaffold that enables dermal papilla cells to regenerate entire follicles. The substrate could aid in hair loss treatment and may have broader applications for skin.

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New Ideas on Hair Breakage: Mending Existing Flaws

Our historical beliefs as to the causes of hair breakage have been largely shaped by findings from testing approaches. More recently, an alternate mechanical testing technique, fatigue testing, has been changing our perspective on this topic.

Recycled Hair Being Used for Oil Spill Cleanup

Human hair swatches are frequently used in the hair care industry to test product efficacy and color deposition; however, after testing, they may have an additional purpose—as human hair is being collected for oil spill cleanup.

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