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This study concluded that hair tonic formulations using extracts of green tea leaves, celery leaves, or their combination can effectively promote hair growth in guinea pigs, with the fastest growth seen using a 2.5% green tea to 7.5% celery leaf extract ratio.

In this case report, interferon-alpha treatment for a man with hemophilia and hepatitis C was associated with unexpected diffuse hair growth, likely caused by the medication.

In this study, researchers found that mangosteen pericarp extract, combined with FeSO₄ as a mordant, effectively produced a stable reddish hair dye on bleached hair, with good color persistence and enhanced tensile strength, indicating its potential as an eco-friendly and safer alternative to synthetic dyes.

This study suggests that supplementing with a cell-free fat extract might enhance embryo development and improve clinical outcomes in older women experiencing in vitro fertilization failure.

In this study, researchers found that a hair tonic formulated with 2% guava leaf extract demonstrated strong consumer acceptance and safe physicochemical characteristics among university students, showing potential as a natural alternative for reducing hair loss.

This study evaluated hair tonic formulations containing Ambon banana peel extract and found that the preparation, particularly at an 8% concentration, significantly promoted hair growth compared to other formulations, though it still differed from the control group's effectiveness.

This clinical trial found that the extract complex of Cistanche tubulosa and Laminaria japonica (MK-R7) significantly improved hair density and diameter in patients with patterned hair loss over 16 weeks.

This study found that a hair tonic formulated from green tea extract showed similar hair growth-promoting activity to 2% Minoxidil in rabbits, without causing skin irritation or bacterial contamination.

This review discusses the potential use of spin traps in cosmetic products to limit reactive oxygen species generated by pollution, emphasizing the need for further research due to toxicity and regulatory concerns.

This study found that the combination of recombinant growth factors and plant-derived extracellular vesicles significantly improved scalp regulation, hair growth, thickness, and density, and reduced hair shedding in the tested formulation by Day 56.

In this study, the researchers found that using dragon fruit peel extract in a gray hair dye formulation, along with specific adjuvants, produced a dark black color on gray hair, demonstrating its potential as a natural colorant alternative to synthetic dyes.

This study found that Avicennia marina extract significantly increased hair growth in androgenic alopecia patients, suggesting its potential effectiveness by inhibiting 5 alpha-reductase and regulating relevant growth factors.

This study suggests that black soybean extract promotes hair growth and improves scalp health by enhancing blood circulation and cellular proliferation, although further human studies are needed to verify these effects.

This study found that Sophora flavescens extract may promote hair growth in mice by inducing earlier hair cycle changes and regulating growth factors in dermal papilla cells.

This study suggests that a herbal extract from Gardenia, Mentha arvensis, Rosemary, and Lavender may promote hair growth in mice at a rate comparable to minoxidil.

This study found that a combination of pandanus and sansevieria leaf extracts at a 3:2 ratio showed improved hair growth activity compared to individual extracts and controls.

This study indicates that Samhwang-Sasimtang ethanol extract may promote hair growth in a mouse model, showing stronger effects than a control but less than 3% minoxidil.

This study found that Carthamus tinctorius floret extract, at a concentration of 0.05 mg/mL, significantly inhibited 5α-reductase activity in DU-145 cells more effectively than standard treatments finasteride and dutasteride, with a stable microemulsion formulation enhancing its skin permeation and stability.

This study found that Pleuropterus cilinervis extracts and animal milk fermented with Lactobacillus rhamnosus promoted hair growth in mice, suggesting potential applications in hair loss treatments.

This study reported that Juniperus sabina needle extract showed significant anti-butyrylcholinesterase activity, suggesting potential medicinal value due to high podophyllotoxin levels.

This study found that golden silk mature silkworm powder improved cognition and neuron proliferation in mice, potentially by enhancing mitochondrial function and countering scopolamine-induced amnesia.

This study found that the herbal extract CS-10-H, like minoxidil, significantly improved hair growth, density, and thickness in a mouse alopecia model.

Certain dietary supplements can improve hair health.

In this study, mangosteen pericarp extract was found to promote hair dermal papilla cell proliferation and enhance melanin synthesis, suggesting its potential as an ingredient in hair growth and tanning products.

In a laboratory setting, this study found that Biotrinine® dry extract activated hair follicle growth pathways and increased certain growth factor secretions in human dermal papilla cells, suggesting potential benefits for treating chronic hair loss.

This study found that an aqueous extract of Bacopa procumbens improved motor function and preserved neuronal structure in a mouse model of Parkinson's disease, suggesting its neuroprotective potential.

This study found that administering drumstick leaves extract with amla powder improved hemoglobin levels among adolescent girls with anemia at a residential facility in Trichy.

This study found that sulforaphane and its related compounds may promote hair follicle growth in mice, suggesting their potential as treatment agents for androgenic alopecia.

This technical report from the European Food Safety Authority responds to comments on its previous scientific opinion regarding a health claim about spermidine and hair growth, reporting no new experimental results.

This study found that a combination of H. rosa-sinensis L. and B. racemosa extracts produced the most hair follicles in stress-induced alopecia in male Wistar albino rats.