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This article reports that hypervitaminosis A in both experimental rats and children leads to severe symptoms such as weight loss, bone issues, and skin problems, which resolve upon stopping vitamin A intake.

This study presented two cases of chronic hypervitaminosis A in adults, highlighting the first reported instance of hepatic cirrhosis due to long-term beef liver consumption.

This article discusses the potential for hypervitaminosis A in patients with chronic renal disease undergoing dialysis, highlighting the risks associated with low-dose vitamin A supplementation, and reports no new clinical results.

This letter describes cases in which papilledema and other symptoms in young girls were attributed to hypervitaminosis A.

This article discusses the case of a patient on long-term renal dialysis with high serum vitamin A levels likely due to inadequate removal during dialysis, highlighting the need to reassess vitamin A supplementation in such patients.

This article reviews the complex role of various biological, genetic, and environmental factors in acne pathogenesis and notes no new clinical results.

This study found that female students experiencing diffuse hair fall had significantly lower Vitamin D3 levels compared to healthy controls.

This study found that 89.3% of female college students in Aden, Yemen, had hypovitaminosis D, with sunscreen use and lack of vitamin D supplements significantly associated with this condition.

This case report describes a 60-year-old male with vitamin A toxicity leading to severe liver disease and symptoms that resolved following liver transplantation, suggesting transplantation as a treatment option for noncirrhotic portal hypertension when symptoms do not improve after stopping vitamin A.

This study found that SMR-2 and SMR-6, analogs of retinoic acid and retinol, were approximately 100 times more toxic than retinoic acid in mice, inducing hypervitaminosis A and affecting various organs and tissues.

This study observed that consuming grouper fish liver caused symptoms similar to acute vitamin A intoxication, indicating its high vitamin A content as the likely cause.

This case report describes severe liver injury in a young patient after prolonged overuse of vitamin A, which resolved after cessation.

This article reports a rare case of toxic keratitis in a patient due to excessive intake of vitamin A, highlighting hypervitaminosis A risks such as severe eye conditions and systemic health issues, especially with cumulative doses exceeding therapeutic levels.

In this study, SMR-2 and SMR-6, retinoid analogs, were found to be approximately 100 times more toxic than retinoic acid in male mice, primarily affecting skin, immune, and reproductive systems.

This study found that 4-(ethoxycarbophenyl) retinamide (RI) exhibited significantly lower acute, subacute, and chronic toxicity compared to other retinoids in mouse and rat models.

This review discusses the role of antioxidants in managing oxidative skin damage and reports no new results, emphasizing the need for understanding their mechanisms, limitations, and risks for safe use.

This study suggests that there is a U-shaped relationship between vitamin D hormonal forms and aging, with an optimal serum calcidiol concentration needed to minimize aging-related chronic disease risk.

This study observed that serum Vitamin D3 levels were low among South Indian students with diffuse hair fall, highlighting global hypovitaminosis D as a concern and suggesting possible dietary or sunlight exposure influences.

In this study, researchers determined that poor feed quality and nutritional deficiency, especially low vitamin A levels, were leading causes of impaired reproductive function in nutria, with deficiencies most pronounced during February-March and linked to clinical signs like growth retardation and alopecia.

This study found that providing quality pharmaceutical care is crucial for safe and effective use of vitamin and mineral supplements during pregnancy and breastfeeding, as many women incorrectly perceive them as entirely safe.

This review discusses how changes in hair and skin may indicate underlying vitamin deficiencies and emphasizes the need to identify populations at risk for these deficiencies; it reports no new results.

This review discusses various potential adverse effects of common oral vitamin and mineral supplements used in dermatology and highlights lesser-known issues like hematologic and neurologic effects from zinc.

This study found that the most likely cause of hypercalcemia in a patient with symptoms of hypervitaminosis A and a history of chronic vitamin A ingestion was vitamin A toxicity.

This source reports that biotin, a water-soluble vitamin B7, may benefit skin, hair, and nail health, including various types of alopecia, without the risk of hypervitaminosis even at high doses.

This report presents two cases where dermatologists identified internal malignancies—small cell lung cancer and stage IIB cervical cancer—through paraneoplastic skin manifestations.

This review highlights the potential benefits of biotin in treating skin disorders related to biotin deficiency but reports no new clinical results.

This study reviews polycystic ovary syndrome and vitamin D, reporting no new results, and notes the involvement of vitamin D receptors and insulin in ovarian function.

This study suggests that dietary vitamin A may influence alopecia development and progression, but the mechanisms remain unclear, highlighting the interplay between genetics and nutrition in these hair loss conditions.

This study found that lower vitamin D levels were inversely associated with the severity of female pattern hair loss and patchy alopecia areata, but not with telogen effluvium.

The authors concluded that chronic telogen effluvium in middle-aged women presents distinct clinical and histological features that differ from androgenetic alopecia and acute telogen effluvium.