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This study generated FGF5-knockout Dorper sheep using the CRISPR/Cas9 system, resulting in significantly increased fine-wool and active hair-follicle density, and explored downstream signaling pathways for potential applications in androgen alopecia treatment.

In this study, a film-forming spray with rosemary essential oil increased hair density in volunteers over 16 weeks, suggesting it has potential efficacy for treating androgenetic alopecia by enhancing hair density restoration.

In this study, oral Pycnogenol® intake was reported to significantly increase hair density and improve scalp microcirculation in Han Chinese menopausal women over six months.

In this study, female-to-male transsexuals treated with long-acting testosterone undecanoate experienced an increase in lean mass but no change in fat mass or bone mineral density over 24 months.

This report discusses the challenges of interpreting bone mineral density in transgender individuals undergoing hormone therapy and highlights the lack of guidelines for assessing fracture risk or BMD results in this population.

This study found that applying a combination of pyridine‐2, 4‐dicarboxylic acid diethyl ester and resveratrol significantly increased hair density in Caucasian women after 1.5 months, potentially due to their synergistic effect on the HIF‐1α pathway.

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 study suggests that both men and women with higher body hair density may have an increased risk of developing basal cell carcinoma and squamous cell carcinoma.

This study reported that atelocollagen enhances collagen synthesis and reduces oxidative stress in aged skin by increasing glycine uptake through GlyT1, resulting in improved skin elasticity and collagen density in aged mice, with effects superior to glycine alone.

In this animal study, rats treated with recombinant human growth hormone (at both low and high doses) experienced quicker burn wound healing than controls, with increased micro vessel density and altered expression of vascular endothelial growth factor, alongside changes in oxidative stress and inflammation markers.

This study in Hexi cashmere goats found that secondary follicle activity increases with time, and Hoxc13 expression varies significantly across different growth stages, suggesting a role in follicle activity.

This study found that mercury chloride administration in rats led to decreased intraepidermal nerve fibers and increased Langerhans cells, suggesting small nerve fiber damage after mercury poisoning.

This study found that in biopsied skin samples of alopecia areata, a lower anagen/telogen ratio was associated with increased T cell infiltration, and enhancing the PD-1/PD-L1 axis may inhibit CD8+T cell infiltration and improve the condition.

In this study, patients with androgenetic alopecia treated with platelet-rich plasma showed increased hair density and improved hair quality over six months, with no notable adverse effects, indicating that PRP may be an effective treatment option for this condition.

This study found that a 16-week dermal application of rice bran extract significantly increased hair density and diameter in male androgenic alopecia patients without causing adverse reactions.

In this study, intradermal injections of QR678 were found to significantly reduce hair fall in men with androgenetic alopecia over 6 months, with superior improvements in hair density and thickness compared to PRP.

In this study, women with androgenetic alopecia showed higher cholesterol levels and carotid artery thickness, suggesting a potential link between female AGA and cardiovascular disease.

PRP treatment increased hair density, especially in men and younger patients with AGA.

Hair loss treatments increased hair density and reduced hair loss in most men, but didn't improve hair thickness for everyone.

AA-PRP temporarily increases hair density in androgenetic alopecia but loses effectiveness over time.

Higher LDL lipids may increase alopecia areata risk, while higher triglycerides may decrease it.

This simulation study found that higher cannabis exposure in a virtual population was associated with increased hair shedding severity and reduced follicular density, but these results are based on modeled data and cannot establish causal relationships.

This study observed hair regrowth and increased density in four cases of androgenetic alopecia treated with a non-ablative erbium glass fractional laser and topical finasteride, with no significant side effects reported.

This study found that superficial cryotherapy significantly increased hair density and thickness in treated eyebrows compared to untreated controls after 5 months in patients with alopecia areata.

This study found that polidioxanona threads increased hair density and satisfaction in treating various types of alopecia, with no adverse events reported, though the small sample limits broader conclusions.

This study found that PRP may increase hair density in breast cancer survivors with EIA or pCIA, but improvements did not differ statistically between treated and untreated sides.

This study found that SHJ extract increased hair growth and melanogenesis in mice, suggesting potential use in cosmeceuticals for hair care.

This study found that applying SERUM THICKER increased hair density significantly over six months in individuals with mild to moderate androgenetic alopecia, with greater efficacy from daily use.

Low-level light therapy significantly increased hair density and thickness in people with hair loss, but they didn't notice a difference.

This study suggests that D2O increases hair length in nude mice by extending the hair cycle duration, particularly the hair-existing phase, which is associated with increased mast cell density.