21 citations
,
October 2011 in “British Journal of Dermatology” This study found that subcutaneous testosterone therapy improved scalp hair growth in a majority of androgen-deficient women who previously reported hair thinning and did not report hair loss as a side effect.
16 citations
,
March 2009 in “Skin Pharmacology and Physiology” This study found that the penetration enhancer SEPA™ significantly increased both the speed and amount of hair growth from minoxidil in balding stumptail macaques compared to Rogaine®.
16 citations
,
October 2003 in “Journal of The American Academy of Dermatology” This study describes a 4-year-old boy who exhibits a rare, synchronized pattern of hair growth and shedding, unlike the typical asynchronous pattern seen in humans.
40 citations
,
January 2018 in “International journal of trichology” This article reviews the relationship between scalp conditions and hair health, suggesting that shampoos with Malassezia inhibitory agents may help reduce premature hair loss, but it presents no new clinical results.
5 citations
,
May 2021 in “International Journal of Cosmetic Science” This review discusses the evidence for a cause-and-effect relationship between scalp condition and hair condition, and reports no new clinical results from trials.
4 citations
,
August 2014 in “The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology” In this study, the Narasoo healing shampoo and Hair tonic were associated with improvements in scalp hydration, hair gloss, and hair growth, but further research is recommended to confirm these effects.
September 2025 in “medRxiv (Cold Spring Harbor Laboratory)” This study found that applying a topical scalp essence with Centella asiatica extracellular vesicles and growth factors significantly improved scalp health and hair growth compared to a placebo after 56 days.
In this study, researchers developed a standardized Ayurvedic hair pack using natural ingredients like Shikakai and Amla and confirmed its safety and pH suitability; they concluded it could be a scientifically validated alternative to synthetic hair products.
October 2025 in “Zenodo (CERN European Organization for Nuclear Research)” This review assessed a traditionally prepared herbal hair oil, finding it exhibited favorable physicochemical properties and stability, with no skin irritation, suggesting it may be a safe natural alternative to synthetic hair care products for promoting healthy hair and scalp.
October 2025 in “Zenodo (CERN European Organization for Nuclear Research)” This review highlighted the potential benefits of herbal hair oils as a natural alternative to synthetic hair care products, noting that a traditionally prepared formulation demonstrated favorable physicochemical properties and no skin irritation, while promoting healthy hair and scalp.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This study suggests that rice water may improve hair health by strengthening hair, reducing breakage, and promoting growth due to its nutrients and antioxidants, even as it becomes a popular ingredient in various hair care products despite limited rigorous research.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This research suggests that rice water may improve hair health by reducing breakage, repairing damage, enhancing flexibility, and hydrating the scalp, making it a popular choice for natural hair care products.
117 citations
,
September 2013 in “Lasers in Surgery and Medicine” This study found that low level laser therapy at 655 nm significantly increased hair counts in males with androgenetic alopecia.
30 citations
,
August 2004 in “British Journal of Plastic Surgery” This case study reports that a patient with extensive scalp scarring achieved an excellent cosmetic result when transplanted chest hair grew from an average of 4 cm at transplant to 15 cm after 18 months.
23 citations
,
December 1991 in “Annals of the New York Academy of Sciences” This study reported that human balding scalp grafted onto nude mice showed reduced linear growth rates of both vellus and terminal hairs.
11 citations
,
November 2015 in “Skin Research and Technology” This study found that individuals with patterned hair loss, both male and female, showed a slower linear hair growth rate compared to controls with hair of equal thickness.
March 2025 in “Journal of Cosmetic Dermatology” This study explored the effects of TTFE on male androgenic alopecia, finding that topical application increased hair density, follicular diameter, and scalp hydration while reducing water loss and sebum production in a 12-week trial.
April 2023 in “Journal of Investigative Dermatology” Staphylococcus epidermidis affects hair growth and metabolism, suggesting it could help manage hair growth issues.
November 2022 in “Journal of Investigative Dermatology” This study found that human scalp hair follicles produce neurohormones and responded to GHRH stimulation by prolonging hair growth, suggesting a functional peripheral HPS neuroendocrine signaling axis in the skin.
September 2025 in “Acta Scientific Pharmaceutical Sciences” This paper examines the rising popularity and potential benefits of rice water for hair care, noting that while it contains beneficial compounds like inositol that may increase hair strength and decrease frizz, there is still no definitive scientific proof of its efficacy.
November 2024 in “International Journal of Social health” This study concluded that a hair-nourishing formulation combining virgin coconut oil and 4% chilli oil significantly enhanced hair growth in white rats over a 21-day period, while also exhibiting good physical stability under varying storage conditions.
January 2016 in “Belarusian State Pedagogical University repository (Belarusian State Pedagogical University)” This research suggests that geometric classification of hair into fewer groups may be more reliable and useful for studying hair characteristics, rather than racial descriptions, especially in medical and forensic applications.
3 citations
,
December 2020 in “International Journal of Women's Dermatology” Scalp micro-wounding helps promote hair growth in female pattern hair loss.
November 2024 in “Journal of Investigative Dermatology” Reishi mushroom extract may help treat hair loss.
This study suggests that topically applied thyroid hormones T3 and T4 promote hair growth on human scalp tissues ex vivo, highlighting potential therapeutic use for hair loss conditions like androgenetic alopecia.
This study found that minoxidil nanoliposomes led to faster hair growth and reduced scalp bacteria in mice compared to free minoxidil.
January 2020 in “프로그램북(구 초록집)” This study found that using a low-level light therapy helmet device daily for 24 weeks improved hair density and thickness among participants, though it did not significantly impact sebum secretion or erythema index.
44 citations
,
March 2004 in “Journal of Investigative Dermatology” This study observed that in vitro treatment of male frontotemporal scalp hair follicles with 17-β-estradiol stimulated hair shaft generation and hair matrix keratinocyte proliferation, suggesting potential anagen-prolonging effects.
33 citations
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January 1997 in “Endocrinology” Testosterone was found to inhibit hair follicle epithelial cell proliferation in adult stumptailed macaques only when dermal papilla cells from bald scalps were present, and this effect was reversed by the antiandrogen RU 58841.
30 citations
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September 2004 in “Experimental Dermatology” This study found that minoxidil did not significantly increase hair shaft elongation in ex vivo human hair follicle culture, questioning the suitability of this method for studying its hair-growth-promoting effects.