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This article provides definitions and explanations of various forms of alopecia and related terminologies but does not present new research findings.

This article suggests that zinc-dependent factors may play a role in the regulation of the hair follicle cycle and could be involved in the pathogenesis of alopecia areata, but experimental confirmation is needed.

This study found that diabetic individuals had significantly lower hair levels of chromium, manganese, and copper, but higher iron levels, compared to non-diabetic controls.

This study suggests that alterations in copper metabolism may play a key role in the development of androgenetic alopecia in women, presenting potential targets for treatment strategies.

This study suggests that elevated levels of certain heavy metals, rather than zinc, may play a causative role in primary chronic telogen effluvium.

This review discusses medical conditions and therapies related to various elements, such as zinc, copper, mercury, cadmium, lead, chromium, and arsenic, without reporting new experimental results; it highlights past findings on deficiencies, toxicities, and historical cases.

These investigations described in the study demonstrate how geochemical techniques can be applied to biological studies in Yellowstone, finding significant mercury accumulation in trout and grizzly bears which correlates with hydrothermal sources.

This case study reports that different organs, such as hair and stature, may grow at varying rates during different stages of growth.

This study found that hair content of iron and zinc does not play a role in chemotherapy-induced alopecia in children with cancer.

This study found that the concentrations of major inorganic elements in human scalp hair increase with age up to 25 years, and calcium and magnesium concentrations are significantly associated with sex in individuals over 20.

This study concluded that the elemental composition of tail brush hair in newborn calves can indicate trace element supply to the fetus during the last months of pregnancy.

This study suggests that the phytochemical characteristics of their extract may help reduce IL-1α levels, potentially offering therapeutic support for addressing certain types of nonscarring hair loss.

This study found that PIXE microanalysis effectively detected and quantified trace element changes in hair shafts, revealing a marked decrease in copper after treatment for green hair syndrome.

This study found that electron and proton microprobe analysis can reveal differences in element distribution within human hair and epidermis, although no significant water content differences were noted between atopic eczema and normal skin.

This study found that a new oral supplement with sulfurated amino acids and trace elements effectively improved hair growth and reduced hair loss in women with telogen effluvium and mild to moderate androgenetic alopecia.

This review investigates how selenium, a trace element found in wheat, may impact hair health by examining its biochemical role in hair follicle biology and its potential therapeutic and toxicological effects.

In this clinical study of 98 patients with focal alopecia, combined laser therapy, which included laser plasma therapy and percutaneous laser irradiation of blood, was reported to alleviate inflammation, promote hair growth, and restore trace elements in affected areas.

This study found that living environment significantly influenced Fe concentrations in dog and cat hair, with outdoor animals showing higher levels than those kept indoors.

This study found that copper levels varied significantly by gender, while young infants had higher levels of copper, zinc, calcium, magnesium, and iron compared to older age groups.

This study found that women with telogen effluvium had significantly lower levels of zinc and iron in their hair compared to healthy women.

In this review, researchers explored hair as a promising tool for identifying biomarkers in schizophrenia, highlighting its potential for supporting personalized medicine through ease of sampling, though acknowledging challenges like individual variability and methodological inconsistencies.

This article reviews methods for dissolving hair proteins and describes how solvents and molecules with hydrophobic groups interact with hair; it presents no new research findings.

This study found that a nutraceutical containing vitamins and trace elements was effective in reducing telogen strands and improving hair and nail conditions in individuals with telogen effluvium and brittle nails syndrome.

In this study, researchers highlight the importance of correcting selenium and zinc deficiencies as part of a comprehensive management strategy for patients with autoimmune thyroiditis complicated by alopecia, as these elements play key roles in thyroid hormone biosynthesis and hair follicle function.

Hair chromium levels might indicate chromium status and relate to glucose metabolism issues.

Eating a balanced diet with the right vitamins and minerals is important for healthy hair, but too many supplements can be harmful.

This study examined the relationship between zinc status and DNA oxidative damage in patients with hair loss in Duhok, Kurdistan Region-Iraq, highlighting the potential role of zinc deficiency in hair loss.

This study found that combining microneedling with 5% Minoxidil and Finasteride significantly improved hair density and hair shaft diameter in males with androgenetic alopecia, outperforming Minoxidil alone or in combination with Finasteride, although changes in hormonal levels and trace elements were not significant.

Higher levels of chromium, selenium, and copper in hair are linked to increased insulin resistance in visceral-obese adults.

This review found that hydrolyzed collagen supplementation, particularly marine collagen, improves skin hydration, elasticity, and density while strengthening hair and nails, especially when paired with vitamin C and trace elements; however, more studies are necessary to evaluate long-term efficacy across different sources and demographics.