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110 Results
Type: Article
Section: Testing > Efficacy
Method/Process
Zeta Potential and Particle Size to Predict Emulsion Stability
Emulsions are popular vehicles in skin care due to their affinity for the skin; however, they are thermodynamically unstable systems. This study investigates zeta potential and particle size distribution as potential screening tools to predict instabilities in emulsion-based cosmetic products, to supplement regular accelerated stability testing.
Sun Care
Uniquely Stable Emulsions Revealed Through Freeze-fracture Transmission Electron Microscopy
Researchers investigated the structures and features of emulsions made with different emulsifiers via freeze-fracture transmission electron microscopy. Potassium cetyl phosphate formed more multi-lamellar spheres than other emulsifiers, and aggregated homo-domains on top of lamellar sheet surfaces and multi-lamellar spheres. These homo-domains are likely to be responsible for the excellent emulsion stability achieved.
Methods/Tools
Consumer Perception of Fine Lines and Wrinkles: Qualitative Assessment
There are varying definitions, associations and overall impressions of fine lines and wrinkles among different consumer segments. The findings of this study offer invaluable insight into consumers’ opinions, and by qualitative in-depth interviews, they provide a well-defined vernacular for aging descriptors. This language is critical for developmental research, consumer evaluation and marketing within the cosmetic industry.
Efficacy
Hidden Hair Damage and the Importance of Multiple Tests
It is of paramount importance for hair researchers to know the history of hair at the time of applying a treatment. The lack of such knowledge can create misleading results. Thus, a stress-strain test in both dry and wet states can provide a rapid means to check the reliability of the information collected, as is shown here.
Natural/Sustainable
Replacing Microplastics: Natural Cellulose Offers Gentle and Biodegradable Exfoliation
While cosmetics represent a small source of primary and secondary microplastics in the environment, it is a source that could easily be avoided by using natural biodegradable alternatives. As such, described herein is a research project to identify a natural, biodegradable alternative for peel applications. Plant cellulose was of particular interest.
Methods/Tools
IFSCC 2014 Explores Social, Psychological and Sensorial Aspects of Beauty
As one might expect from an event centered around beauty and staged in Paris, the 28th Congress of the International Societies of Cosmetic Chemists (IFSCC) was nothing less than fabulous. However, the glamour and fanfare was deeply rooted in science.
Method/Process
Non-Invasive Measurement of Epidermal Proteins for Psoriasis and Skin Care*
Abnormal epidermal turnover in psoriatic skin impairs its barrier function and tissue repair capabilities. Therefore, studies of hyperkeratinization and hyperproliferation have been conducted to better understand the disease. Here, the administration of heavy water and a tape-stripping method are used to measure skin protein turnover in psoriatic skin and surrounding tissues. Results demonstrate benefits over other proliferation measurements.
Efficacy
Sea Anemone Delivery of Collagen and γ-PGA for Anti-aging Benefits
The effective delivery of youth-preserving collagen and moisture remains a cosmetic Holy Grail. In response, this study describes a natural microinjection system based on the stinging cells of the
Cnidaria
sea anemone to effectively puncture the stratum corneum layer and deliver its content—both marine collagen and γ-PGA—into skin, offering a promising new class of solutions to age-old challenges.
Methods/Tools
Natural vs. Synthetic Antimicrobials and HDAC as an Indicator of Microflora Health
This article reviews the role of skin microflora in protecting skin, and assesses how the histone deacetylase (HDAC) enzyme is implicated. From this, HDAC expression is used as an indicator to compare the effects of traditional biocides and preservatives with natural antimicrobials on skin’s microbiome. Results suggest the latter effectively preserve products while maintaining a healthy microbiome.
Method/Process
Testing the Safety and Efficacy of Multifunctional Personal Care Products, A Primer
Multifunctional products may offer solutions to consumer challenges but as the needs of consumers grow more complex, so do their safety and efficacy testing. This article provides a primer on these considerations.
Efficacy
Image Processing and Analysis to Evaluate the Effects of Porous Polyamide Microspheres in Cosmetics
Described here is an image processing system that compensates for changes in illumination and volunteer position, and two algorithms to quantify skin texture and wrinkles. These methods evaluate skin parameters from a single image without contacting skin. Their abilities are demonstrated here in evaluations of the benefits of porous polyamide ultra-fine powders on skin texture and gloss.
Efficacy
Image Processing and Analysis to Evaluate the Effects of Porous Polyamide Microspheres in Cosmetics
Described here is an image processing system that compensates for changes in illumination and volunteer position, and two algorithms to quantify skin texture and wrinkles. These methods evaluate skin parameters from a single image without contacting skin. Their abilities are demonstrated here in evaluations of the benefits of porous polyamide ultra-fine powders on skin texture and gloss.
Efficacy
Words from Wiechers: Perception of Reality or Reality of Perception?
"Suppliers promise quite a lot to their customers," Wiechers tells us. "And [manufacturers] love to insist on more...This attitude promotes a shift from reality to perception." Read on to learn this month's lesson from Wiechers.
Efficacy
Aubergine Mutes TRPV1 and Boosts TRPV-3 and -4 to Reinforce and Comfort Skin
While the causes of sensitive skin are not confirmed, they most likely are due to a neurogenic inflammation after the enhanced activation of sensory proteins in keratinocytes. The present work tested the ability of a
Solanum melongena
(aubergine) cell culture extract to inhibit sensory mediators of discomfort and activate barrier-boosting pathways.
Literature/Data
Sourcing and Using Maca and Suma Roots
In recent years, interest in sourcing plant roots as active ingredients for cosmetic use has grown tremendously. Roots such as maca and suma are rich in secondary metabolites and, as described here, can have specific actions on skin to increase its vitality and response to environmental stresses.
Method/Process
Collagens I and III, and Elastin Activation for Anti-aging
As an alternative to semi-invasive facial rejuvenation techniques, the authors developed an active ingredient to reactivate senescent fibroblasts by stimulating metabolic pathways for collagens I and III, and elastin. The biological activity of the resulting ingredient is investigated here using in vitro models, ex vivo explants and human volunteers.
Literature/Data
Preserving the Facts on Parabens: An Overview of These Important Tools of the Trade
Parabens have a long history as effective preservatives in foods, cosmetics and drugs, with extensively documented human and environmental safety profiles. This article reviews these important ingredients.
Efficacy
Dual Defense: Protecting and Repairing Hair Holistically, Inside and Out
Cumulative stress encountered by hair during daily grooming causes breakage and other forms of damage. This paper presents a holistic approach to protect hair from within and without by targeting the cortex and cuticle sheath. Fatigue testing and other assessments are carried out to determine efficacy.
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