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This chapter reviews formulation principles for creating cosmetic nanoemulsions and applications targeting skin and hair care, but does not present new experimental results.

In this study, Far2-/- mice were observed to develop focal alopecia with altered sebaceous gland morphology and lower skin lipid levels compared to wildtype mice.

This case report describes a successful frontal region reconstruction using Cerament for a 50-year-old man, resulting in satisfactory forehead morphology and improved appearance four years post-surgery.

This study reports that a plant extract from Orobanche rapum can stimulate skin rejuvenation and protect cutaneous microbiota, potentially creating healthier skin.

This study observed that the glucose linoleate derivative 6‐O‐GL supported hair follicle growth and survival in vitro, acting as a stable lipid precursor and energy provider.

This article reviews the genetic research on male androgenetic alopecia, highlighting that over 300 associated risk variants have been identified, with unclear mechanisms of action.

This study found that menopause alters hair lipids and reduces hair quality, with hormone replacement therapy mitigating some changes.

This study found that applying a 1% BOI lotion improved hair density and thickness in patients with mild pattern hair loss over six months.

This study found that deleting ceramide synthase 4 in skin epidermis stem cells disrupts hair follicle and skin barrier function, leading to immune responses similar to atopic dermatitis, due to imbalances in lipid composition affecting differentiation.

This review discusses the formation and structure of the cornified cell envelope in the epidermis, highlighting biochemical pathways and genetic factors, but presents no new experimental results.

This study found that, despite the unchanged total level of 18-MEA, deletion of the Sox21 gene disrupts its attachment to the hair cuticle, increases cholesterol sulphate levels, and differentially affects ceramide composition.

This review discusses the relationship between gut microbiota and polycystic ovarian syndrome (PCOS), including its potential mechanisms and the role of alterations in microbiome composition on PCOS pathophysiology.

This meeting synopsis on the 66th Annual Montagna Symposium reports no new results but outlines discussions on precision dermatology, integrating molecular insights with clinical applications for personalized skin care.

This study analyzed the lipid composition of mouse hair, focusing on sphingolipids, and found significant differences in ceramides, glucosylceramides, and sphingomyelins between hair follicles and hair shafts.

This study investigated the effects of pathological α-synuclein on sebaceous gland cells in Parkinson's disease, finding that α-synuclein exposure altered cellular differentiation and lipid production, suggesting a potential link between α-synuclein and lipid dysregulation in the skin of PD patients.

This review suggests that multifunctional cosmetic systems, particularly HIVEN Curl Code ®, may help control frizz and maintain curl definition in highly curly hair by utilizing various conditioning and biofunctional ingredients.

This review discusses how glucagon-like peptide-1 receptor agonists, used for type 2 diabetes and obesity, may cause skin aging and hair loss, and explores methylene blue as a potential protective treatment.

This study reports that specific hair care practices common among individuals with high-curl-pattern hair could exacerbate seborrheic dermatitis, presenting significant treatment challenges and psychological impacts, and emphasizes the need for further research to tailor culturally sensitive solutions.

In this comprehensive review, researchers reported that macromolecules like type I collagen, keratin, and ceramides enhance hair health by improving follicular function and increasing hair density, strength, shine, and resilience, as shown in various in vitro, animal, and human studies.

In this study, orally administered Centella asiatica extract, standardized for asiaticoside content, significantly improved skin barrier function, elasticity, and reduced signs of UVB-induced photoaging in hairless mice, highlighting its potential as a nutricosmetic for skin health.

In this study, researchers found that the lipid composition in hair significantly affects water diffusion and may explain differences in dyeing and cosmetic treatment responses between Asian and European hair, with CP2 fibers having more lipids than CP3 fibers.

This review highlights concerns about dermatological side effects linked to rapid weight loss from glucagon-like peptide-1 receptor agonists used for type 2 diabetes and obesity treatment, such as skin laxity, decreased collagen, and hair loss, emphasizing the importance of managing these while retaining metabolic benefits.

This scoping review suggests that physiological differences in skin structure may affect how individuals with different skin tones respond to pressure ulcer development, emphasizing the need for targeted prevention strategies.

This review suggests that linoleic acid, an essential fatty acid, may have various beneficial effects on skin health and hair growth through diverse biological activities observed in animal or skin cell models.

This review reports that transgender patients undergoing hormone therapy may experience acne differently, necessitating tailored treatments that take into account skin dryness and the potential need for maintenance topical treatments.

This study found that early-onset male androgenetic alopecia is associated with abnormal lipid metabolism and lower levels of certain serum markers, which may serve as risk factors or protective factors for the condition.

This review explores adult female acne, focusing on its multifactorial causes, treatment options, and impact on quality of life, but reports no new clinical results.

In this study, the researchers found that deleting ceramide synthase 4 in the skin's epidermis alters stem cell differentiation, disrupting hair follicle structure and barrier function, potentially leading to immune responses similar to atopic dermatitis.

Adipose stem cell exosomes may effectively treat atopic dermatitis by reducing inflammation and improving skin health.

This case report describes a 58-year-old woman with telogen effluvium linked to COVID-19 whose hair loss symptoms greatly improved after using a specific hair care routine for 30 days.