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This review compares animal and human skin characteristics in in vitro permeation studies but reports no new results, highlighting variations and the need for better model correlations.

This study found that mice lacking the 1αOHase enzyme, which is responsible for producing a key vitamin D metabolite, showed impaired epidermal differentiation and delayed recovery of skin barrier function after disruption.

In this study, the researchers established a dose–response relationship between the hair follicle dose during cranial irradiation and the development of permanent alopecia, with other factors showing limited correlation.

This study found that epidermal VEGF is crucial for maintaining skin barrier function in mice and may help explain psoriasis development following skin trauma due to its effects on angiogenesis and hyperplasia.

The study reported that combining the Follicular Closing Technique with the Franz diffusion cell is a valuable method for investigating follicular caffeine penetration in vitro, though kinetics differ from in vivo results.

This article reviews the potential relationship between different forms of permanent hair loss such as cicatricial pattern hair loss and discusses related conditions, reporting no new clinical findings.

This study found that finasteride significantly reduced serum dihydrotestosterone levels, confirming its efficacy as a 5a-reductase inhibitor, while Permixon showed no effect in healthy male volunteers.

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 found that permanent waving treatment partially disrupts the α-helical structure in human hair microfibrils, primarily during the initial reduction phase, rather than just affecting disulphide bonds.

This study reports that permanent and severe alopecia is a newly identified complication of the FEC 100–docetaxel regimen used for adjuvant breast cancer treatment.

This article discusses a unique case of permanent chemotherapy-induced alopecia in a patient receiving chemotherapy for breast cancer, characterized by a distinctive histologic finding and excludes bone marrow transplantation, but reports no new clinical results.

This case study reported a 23-year-old woman with chronic myeloid leukemia who developed permanent hair loss after chemotherapy and did not respond to topical minoxidil treatment.

This study found that permanent chemotherapy-induced alopecia was relatively common three years after treatment among breast cancer patients receiving adjuvant chemotherapy, particularly those on taxane-based regimens.

This study found that permanent alopecia can occur after certain chemotherapy treatments and presents as nonscarring hair loss similar to androgenetic alopecia, with specific histological features that could be misdiagnosed without proper clinicopathological correlation.

This study found that overexpression of the calcium sensing receptor in transgenic mice accelerates epidermal differentiation and hair growth, suggesting its role in enhancing calcium signaling and interaction with other pathways.

This study found that permanent waving treatment induces structural changes in the cortex proteins of white human hair, significantly reducing its tensile strength without altering the S-S band intensity.

This study found that targeting the hair follicle can be increased by using lipophilic drugs combined with surfactant solutions and propylene glycol.

In this study, hair damaged by permanent dye showed signs of recovery over time, with near complete restoration to its original state after eight weeks.

This study found that the contribution of the hair follicle pathway to skin permeation of chemicals can be predicted using lipophilicity, with hydrophilic chemicals showing greater permeation reduction from hair follicle plugging than lipophilic ones.

This study found that shampoo and conditioner do not alter hair's molecular structure, while perming treatments significantly affect keratin and intermediate filament structures due to bond alterations.

This case report described cosmetically significant hair regrowth in a 39-year-old woman with permanent chemotherapy-induced alopecia after continuous oral minoxidil use.

This study found that ion-paired solutions significantly improved the skin penetration of risedronate in hairless mice compared to risedronate alone.

This study found that the reproductive function of female hairdressers may be negatively affected by long-term exposure to permanent-waving solutions containing thioglycolic acid, raising concerns about its potential carcinogenic effects.

This study observed various patterns of permanent alopecia in breast cancer patients treated with taxanes and adjuvant hormonal chemotherapy, hypothesizing disruptions in hair follicle cycles due to chemoinflammatory and hormonal factors.

This case report describes a 52-year-old black woman with diffuse scalp swelling and thinning hair attributed to a large increase in the thickness of scalp subcutaneous fatty tissue.

This review explores the use of skin penetration enhancers like Transcutol® in various formulation systems, discussing their mechanisms and effectiveness in improving transdermal drug delivery without breaching the skin.

This study from Los Angeles supports the idea that using permanent hair dye may increase bladder cancer risk in US women, especially those with a slow NAT2 acetylation phenotype.

This study identified two distinct histological patterns in permanent alopecia following bone marrow transplantation, suggesting links to myeloablative chemotherapy and chronic graft-versus-host disease.

This article reviews the current practices and interpretations of research data on permanent waving and hair straightening, but does not present any new research findings.

This review discusses various nonfollicular scalp conditions causing secondary scarring or permanent alopecia and highlights the importance of specific diagnoses and treatments but reports no new results.