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This review discusses the classification and regulation challenges of anti-ageing cosmetics in Europe and reports no new findings; it calls for increased transparency to help consumers make informed choices.

This article reviews the risks of metal exposure from cosmetic products and emphasizes the need for stricter regulation and consumer awareness, without presenting new data or results.

This review discusses various environmental and chemical factors that contribute to hair shaft disorders, such as fractures, and highlights the potential roles of cysteine and glutamine in hair health, but reports no new results.

This study found that microspicule cosmetics with low-molecular-weight peptide complexes significantly improved skin whitening, pore condition, and skin barrier function over four weeks compared to a non-microspicule formulation.

This article reviews the potential hair-protective effects of Onion and Aloe vera against damage from hair dyes but reports no new experimental results.

This chapter reviews differences in dermatological treatments and conditions between male and female patients, particularly noting the impacts of sex steroids on various skin processes, but presents no new clinical findings.

Some chemicals can permanently or temporarily remove color from skin and hair, which can be distressing and is not well-regulated in cosmetics.

This review discusses the use of mushrooms and their bioactive compounds in cosmeceuticals and nutricosmetics and reports no new clinical findings, highlighting potential areas for future research and development.

This study introduced a novel in vitro assay for tracking melanosome transfer between melanocytes and keratinocytes, facilitating the quantification of melanin transfer and supporting the role of filopodia as a conduit.

Plant-based ingredients in hair care are being replaced by synthetic alternatives.

This study observed that treating human hair with NaOH led to partially removed cuticles, resulting in better fiber cohesion and mechanical properties similar to wool, unlike bleach or formic acid treatments, which weakened the fibers.

This study found that hair with lower levels of keratin associated proteins reduced the foreign body response in mouse subcutaneous implant tests compared to hair with higher keratin levels.

This article discusses the mechanisms by which Cutibacterium acnes contributes to acne vulgaris and mentions potential triggers like UV light and tobacco, but it reports no new clinical results.

This review details the expression and diverse functions of melatonin receptors in non-neural tissues and reports no new clinical findings, emphasizing their potential as therapeutic targets across various physiological and pathological processes.

This review discusses the role of DHEA in intracrinology, highlighting its impact on breast and prostate cancer treatment and potential as a menopause therapy, but reports no new research findings.

This review discusses the cutaneous serotoninergic/melatoninergic system's potential role in skin function and resilience against environmental and internal stresses, but does not report new experimental findings.

This review discusses the protective and stress-buffering roles of melatonin in skin functions and structures but does not present new clinical findings.

This review provides a comprehensive overview of melatonin's physiological roles, effects, and clinical implications, but it does not present new experimental findings.

This review discusses gender-linked skin differences, such as hormone metabolism and sebum production, and reports no new findings; it suggests these insights might inform male-specific dermatological treatments or cosmetic products.

This review discusses the effects of visible light on human skin, highlighting its role in pigmentation, thermal damage, and the treatment of several skin conditions, while noting limited sunscreen protection against it; no new clinical results are reported.

This review discusses melatonin's potential in dermatology, highlighting its antioxidative, immunomodulatory, and DNA repair properties, but reports no new clinical results.

This review discusses skin changes during pregnancy, highlighting both pregnancy-specific and common physiologic changes, but reports no new clinical findings.

This study supports the conclusion that the hormetic dose-response model is the most prevalent and fundamental model in biological and biomedical sciences, applicable to a wide range of clinical conditions.

This study found that hair follicles in both mice and humans may serve as an important site for melatonin synthesis and signaling, potentially influencing hair cycle regulation by modulating keratinocyte apoptosis.

This study suggests that melatonin plays a role in hair follicle function by modulating growth and pigmentation, and it may act as a protective agent in active hair growth phases.

This study found that combining near-infrared laser phototherapy with indocyanine green application may improve acne vulgaris by reducing active lesions and inflammation without side effects.

Treatments for melanin disorders exist, but more effective options needed.

This review highlights the potential of extracellular vesicle-based therapies for treating various diseases, but it also notes challenges like the lack of regulatory guidelines that hinder their clinical development.

This review discusses the psychological importance of hair and explores how various hair cosmetics can affect hair health, emphasizing that certain products can lead to acute hair problems when repeatedly altering the natural style.

This study introduced a new technique, 2Phatal, enabling precise apoptotic cell ablation in living animals, revealing unique cell-type differences in apoptosis-related dynamics.