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This review assesses the role of vitamins A, B, C, and D in treating dermatologic conditions and highlights promising applications, although further research is required to confirm their efficacy.

This review discusses various metabolic and vitamin disorders affecting hair structure, including Menkes' syndrome, arginosuccinicaciduria, and recent findings on vitamin-related alopecia, but reports no new clinical results.

This study found that nutritional supplementation with hydrolyzed collagen, amino acids, vitamins, and minerals significantly improved hair anagen/telogen ratios and hair density in telogen effluvium patients.

In this study, researchers found no significant difference in vitamin D levels between psoriasis patients and controls, suggesting no association between vitamin D deficiency and psoriasis.

This chapter reviews various adverse effects associated with vitamins, including hypercalcemia from high doses of vitamin A, hair loss from retinoid treatment, and complications with vitamin B6 in Parkinson's therapy, but reports no new clinical findings.

This source reports that while low vitamin levels are linked to various types of alopecia, the effectiveness of supplements is minimally supported by evidence and other toxicity can occur.

In this study, serum levels of vitamin C, vitamin E, and total antioxidant capacity did not differ significantly between individuals with premature greying hair and controls, but a strong association with family history was observed.

In this study, Libyan patients with diffuse hair loss were found to have significantly lower levels of zinc, ferritin, and vitamin D compared to those without hair loss, suggesting a possible link between these micronutrient deficiencies and hair loss.

In this case report, researchers describe a 44-year-old woman with refractory patch alopecia areata achieving complete hair regrowth using a multi-modal approach of systemic and topical cholecalciferol with microneedling, although systemic vitamin D repletion remains a significant confounder.

In this study, researchers found that female COVID-19 patients experiencing hair loss had higher testosterone levels and lower Vitamin D levels than healthy controls, suggesting these hormonal factors may play a role in post-COVID-19 hair loss.

This study found that six-month supplementation with fish-derived collagen peptides, calcium, and vitamin D3 improved skin hydration and elasticity and reduced hair loss in menopausal women, with collagen playing a dominant role in enhancing skin elasticity.

This study investigates differences in nutritional status, vitamin, and mineral levels between individuals with telogen effluvium and a control group, aiming to understand the nutritional factors involved in this condition.

This study found that patients with alopecia areata who have low vitamin D levels and high CRP levels are more likely to develop the universalis form of the condition, indicating a need for more aggressive treatment in these cases.

This chapter reviews emerging side effects of various nutritional supplements and alternative medicine practices, highlighting potential toxicities and stressing the need for careful identification and management by healthcare professionals.

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 study investigates the relationship between vitamin B12 levels and chronic telogen effluvium, reporting that the role of vitamin B12 in its pathogenesis remains unclear.

A vitamin and mineral supplement significantly reduced hair shedding in Brazilian women with telogen effluvium.

This study describes the case of a 22-year-old female with alopecia areata linked to vitamin D deficiency, highlighting the importance of early diagnosis and management of deficiency to prevent broader health issues.

In this case report, an 80-year-old woman experienced darkening of previously grey hair, which may be linked to vitamin B supplementation, though its effectiveness is typically associated with reversing greying only in the presence of an initial vitamin B deficiency.

This study found that Vitamin B12 deficiency was more common in patients with chronic telogen effluvium than in healthy controls.

This study found that vitamin C increased the survival, proliferation, and hair-regenerative potential of adipose-derived stem cells through the MAPK pathway and enhanced hair growth in mice.

This study found that melatonin-loaded vitamin C-based nanovesicles improved hair thickness, density, and reduced hair loss in patients with androgenic alopecia more effectively than melatonin solution.

This article reviews the molecular interactions involved in hair follicle cycling and highlights the role of dermal papilla cells, but it presents no new research findings.

This case report observed that pulmonary arterial hypertension in a man with severe vitamin C deficiency resolved after vitamin C supplementation, suggesting a potential role of vitamin C in managing this condition.

Silymarin improves hair follicle health better than vitamin C by boosting cell growth and reducing oxidative stress.

This case series describes three siblings with hereditary vitamin D-resistant rickets, highlighting variations in their clinical presentations.

This case report describes a previously healthy 3-year-old girl who developed scurvy symptoms not directly linked to vitamin C dietary deficiency, highlighting the potential for misdiagnosis in similar cases.

This study found that supplementing arsenic-fed Black Bengal kids with vitamin E, alone or combined with yeast culture, partially ameliorated growth and reduced arsenic load in faeces, urine, and hair.

In this case series, researchers observed that patients with inflammatory bowel disease often experienced vitamin C deficiency, which was linked to symptoms of scurvy, highlighting the need for dietary counseling.

This paper discusses the potential benefits of incorporating guava leaf extracts into skincare, hair care, and oral care products, highlighting their antibacterial, antioxidant, and acne-treating properties, as well as their possible effects on dandruff removal and hair loss reduction.