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Vitamin D deficiency is common in temporary hair loss, and stress is often a suspected cause.

This review discusses the application of low-level light therapy for hair loss treatment, particularly androgenetic alopecia, and reports no new clinical results; the authors suggest consideration of light source characteristics and potential pros and cons.

Thyroid disease can cause hair loss and treating thyroid problems might help with hair disorders.

This study found that in young Taiwanese women with PCOS, low sex hormone-binding globulin levels were associated with low HDL cholesterol levels, independent of insulin resistance and obesity.

This study found that topical application of triiodothyronine (T3) can induce the transition of hair follicles from the telogen to the anagen phase in mice and stimulate hair shaft growth in vitro.

In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.

The researchers reported that during early embryogenesis and larval development in Silurana tropicalis, inhibiting steroidogenic enzymes cyp19 and srd5beta affects genes related to thyroid and reproductive systems.

This study found that an intermittent low-dose regimen of finasteride (2.5 mg every 3 days) effectively reduced hirsutism scores in women with idiopathic hirsutism or polycystic ovary syndrome, with fewer side effects than continuous daily administration.

This review discusses recent molecular biology advances in the human phenol sulfotransferase gene family and reports no new results; the authors highlight its relevance for studies of endogenous and xenobiotic metabolism.

In this study, researchers found that Hashimoto's thyroiditis patients, despite being in euthyroid status, experienced more severe extrathyroidal symptoms compared to healthy controls, and elevated thyroid antibodies were linked to lower health-related quality of life and increased inflammation.

This study found that a low-dose intermittent finasteride regimen significantly reduced hirsutism scores in adolescent girls with PCOS or idiopathic hirsutism, with similar efficacy but potentially safer and less expensive than continuous administration.

This study observed that direct exposure to androgens in Western clawed frogs differentially affects thyroid receptor and deiodinase gene expression in male and female tissues, offering insight into sex-specific metabolic pathway activation.

Some people with chronic hair loss may have thyroid autoimmunity.

This paper presents a case study of a 21-year-old male with thyroid hemiagenesis, where the left thyroid lobe and isthmus are absent, and discusses the anomaly's potential clinical consequences based on existing literature.

This study reports that low levels of HDL cholesterol and IGF-1 were associated with a higher risk of hair loss in middle-aged women, but causal relationships remain uncertain.

This case study reports complete beard hair regrowth in a man with beard alopecia areata after six months of treatment with 0.1% triamcinolone acetonide cream.

This study found that young women with PCOS had normal thyroid function but showed alterations in lipid metabolism, which may predispose unmarried women in this group to cardiovascular diseases.

This study found that thyroid volume was increased in PCOS patients with insulin resistance, with potential influences from TSH and LH levels on these changes.

This study found a strong association between thyroid disorders and dermatological conditions such as vitiligo, alopecia areata, and melasma, suggesting a benefit to including thyroid function tests in routine investigations for these conditions.

This study found that patients with thyroid dysfunction were more likely to experience skin disorders such as chronic idiopathic urticaria, vitiligo, and alopecia areata compared to a control group.

A cancer patient developed a type of hair loss after starting a cancer drug called vandetanib.

In this study, male patients treated with 150 mCi of radioactive iodine showed no negative impact on fertility, but long-term studies with larger groups are needed to further assess hormonal effects and sperm health after this treatment.

In this study, thyroid disorders were found to significantly affect physical and emotional well-being, with notable prevalence in married, urban, and non-working participants in South India.

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 reported that women with polycystic ovary syndrome had higher glypican-4 levels compared to controls, indicating its significant role in hormonal regulation associated with the condition.

This observational study reviewed thyroid eye disease patients treated with teprotumumab at one center, reporting common side effects like fatigue and dry eye symptoms, with serious adverse events including two cases of blood clots and one pulmonary embolism.

This study indicates that higher thyroid-stimulating hormone levels may be linked to post-COVID-19 hair loss in women, while ferritin levels showed no significant correlation.

This review explores the association between alopecia and thyroid autoimmune disease, also highlighting a linked increased risk of thyroid cancer, but presents no new clinical findings.

This study found that women with PCOS had a higher prevalence of hypothyroidism compared to those without PCOS, especially among the obese PCOS subgroup.

This study found that diode and alexandrite laser hair removal systems did not significantly impact thyroid hormone concentrations, hemoglobin, or bilirubin levels in women undergoing facial hair treatment.