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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 aimed to identify possible associations between a hair pull test and various pathological, biochemical, and hematological parameters in Czech patients with different types of alopecia.

This study suggests that analyzing hair samples with a liquid chromatography-mass spectrometric assay may offer a reliable method to measure average quarterly vitamin D levels, potentially complementing blood tests.

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.

A genetic mutation caused severe rickets and alopecia in an Indian patient, but high-dose calcium and phosphate treatment improved their condition.

This report describes a 19-year-old male with 49,XXXXY syndrome receiving testosterone replacement therapy, which led to improvements in reproductive development, metabolism, and social interaction after a year of treatment.

The document concludes that more research is needed to confirm if blood tests for things like iron and vitamin D are helpful for hair loss from Telogen effluvium.

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

In this case study, biotin supplementation was reported to interfere with free testosterone assay results, leading to falsely low readings in a postmenopausal woman with hyperandrogenism.

In this study, transgender adolescents treated with testosterone for a median of 12 months experienced effective virilization, including voice deepening and increased hair growth, but also showed decreased HDL cholesterol and BMD z-scores, and increased hematocrit, with no short-term safety issues reported.

This review discusses the association between vitamin D receptor polymorphisms and polycystic ovary syndrome, noting the need for further research on their impact on the disorder's manifestations.

This study analyzed 19 articles and found that vitamin D significantly improved the hormonal profile in women with PCOS, with greater effects observed after 8-week interventions compared to 12-week ones.

This review discusses biotin supplementation for dermatological conditions and highlights the lack of strong evidence supporting its efficacy, as well as the potential for laboratory testing interference.

This study found that adequate vitamin D status is necessary for metformin to effectively reduce prolactin levels in men with iatrogenic hyperprolactinemia, while improvements in glycemic control were observed across all vitamin D groups.

This study observed that pediatric patients with diffuse, non-scarring alopecia had significantly lower levels of zinc and folate compared to matched healthy controls, suggesting a possible link between these deficiencies and hair loss in children.

This study found that in Iraqi women with PCOS, those taking vitamin E supplements experienced a significant reduction in androgenic symptoms like hair loss, weight gain, and acne, along with lower levels of certain hormones linked to the condition.

This study found that low ferritin levels are associated with higher telogen ratios in women with diffuse hair loss, suggesting an important role of ferritin in telogen effluvium diagnosis.

This study found a significant negative correlation between serum SHBG levels and androgenetic alopecia severity in women, but not in men, while no significant correlation was observed for testosterone, estradiol, dehydroepiandrosterone sulfate, and vitamin D levels with hair loss severity across genders.

This case report illustrates that high-dose biotin supplementation can cause false thyroid function test abnormalities in vitro, emphasizing the need to assess biotin intake before testing.

This study found that women with PCOS had significantly lower vitamin D levels and higher serum prolactin and testosterone than women without PCOS, suggesting a link between vitamin D deficiency and PCOS symptom severity.

This study assessed vitamin E and a combined oral contraceptive's impact on continuous light-induced PCOS in female rats, finding they reduced testosterone levels and modified oxidative stress, suggesting benefits via melatonin-related pathways.

This study found that women experiencing hair loss after recovering from COVID-19 had significantly lower Vitamin D and ferritin levels and higher testosterone and triglyceride levels compared to those without hair loss, indicating a potential link between these factors and the condition.

This study by a panel of 13 clinicians led to 22 consensus statements recommending approaches for diagnosing scarring and nonscarring alopecias, suggesting scalp biopsy for suspected scarring alopecias and specific serologic tests for nonscarring types like alopecia areata based on clinical presentation.

In this study, Pilopeptan® Intensive, a nutritional supplement containing hydrolyzed collagen, Group B vitamins, and zinc, was found to significantly improve hair parameters in telogen effluvium patients, with sustained benefits observed posttreatment, although mild side effects were reported by some participants.

This study reported that an ex vivo organ culture system effectively induced aging-related changes in healthy human skin, allowing testing of senolytics like tretinoin, resveratrol, and caffeine.

This study found that the Keyora Lycopene 23 in 1 formulation may improve various aspects of male endocrine and reproductive health by targeting oxidative stress, nitric oxide deficiency, and hormonal imbalance.

In this study, the researchers introduced the Keyora Lycopene 23 in 1 formulation, demonstrating its potential to improve male endocrine and reproductive health by addressing oxidative stress, nitric oxide deficiency, androgen imbalance, and mitochondrial dysfunction through a comprehensive multi-nutrient approach.

This study outlines that for addressing hair loss in young women, a comprehensive approach including hormonal evaluation, thyroid function, iron and vitamin D testing, along with clinical assessments like pull tests and trichoscopy, is recommended.

This study recommends a combination of hormonal and thyroid evaluations, iron studies, vitamin D testing, and clinical assessments like pull tests and trichoscopy for investigating hair loss in young women.