May 2026 in “Revista Iluminart” In this study, researchers found that adding coffee grounds to neutral shampoo, a popular DIY trend, resulted in peak caffeine extraction after seven days, with concentrations surpassing those in commercial products, suggesting educational potential for chemistry classes.
August 2015 in “Arquivo Brasileiro de Medicina Veterinária e Zootecnia/Arquivo brasileiro de medicina veterinária e zootecnia” This study found that maternal caffeine intake during gestation and lactation can lead to skin lesions like hypotrichosis and alopecia in both mother and offspring rats, irrespective of maternal cortisol levels.
This study evaluated the therapeutic response of an Afro-descendant patient with non-scarring alopecia after prolonged use of alkaline straighteners and mechanical traction, highlighting the susceptibility of Afro hair to chemical and mechanical damage due to its structure.
December 2025 in “Revista em Agronegócio e Meio Ambiente” This study investigated the effects of ultrasound-assisted extraction on sunflower seed oil mixed with defective green coffee grains, finding that higher coffee grain ratios decreased oil yield but increased phenolic content and antioxidant activity, with potential applications for wound treatment.
In this study, researchers found that cosmetic formulations containing guaraná extract effectively controlled oiliness in oily skin and hair by reducing sebaceous gland activity and lipid content without compromising skin barrier function, making them promising for managing excessive sebum production.
This case report discusses a patient with female androgenetic alopecia and chronic telogen effluvium, emphasizing the importance of follicular unclogging to enhance treatment effectiveness, combining deep cleaning, caffeine application, physical stimulation, and lifestyle changes as an individualized, effective alternative to oral medications.
8 citations
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February 2017 in “International journal of molecular sciences” This study found that the natural extract e-CAF promotes the proliferation and migration of human hair dermal papilla cells in vitro, suggesting potential benefits for skin regeneration and tissue repair.
40 citations
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August 2018 in “Skin appendage disorders” This review examines complementary and alternative medicine for alopecia and finds limited support from robust clinical trials, highlighting the need for standardized studies to evaluate efficacy and safety.
2 citations
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July 2018 in “Elsevier eBooks” This review discusses commonly used dietary supplements for hair growth and highlights the lack of evidence supporting their efficacy and safety in the absence of nutritional deficiency; it reports no new research results.
April 2026 in “Zenodo (CERN European Organization for Nuclear Research)” This source does not report research results; it promotes a Hair Boost Serum marketed for improving hair health in UK conditions.
February 2024 in “Skin health and disease” This source reviews popular cosmeceutical ingredients for skin care, noting that while they are popular among consumers for anti-aging benefits, many lack robust clinical evidence for their efficacy and safety, as they are not regulated by the FDA.
February 2022 in “Scientia Pharmaceutica” This study validated that six out of seven tested topical formulations for alopecia are compatible for 6-month use, suggesting they may be practical for compounding pharmacies.
2 citations
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March 2017 in “Asian Journal of Beauty and Cosmetology” This study found that caffeic acid reduced UVB-induced damage and oxidative stress in human dermal papilla cells, suggesting its protective efficacy against such cellular damage.
5 citations
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October 2020 in “Giornale italiano di dermatologia e venereologia” This study found that a phyto-caffeine-containing shampoo was more effective than a control shampoo in reducing hair loss and improving hair strength in women with androgenetic alopecia over a 6-month period.
1 citations
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February 2018 in “Psicologia e Saúde em Debate” This study explored the preformulation of a caffeine-containing shampoo for treating androgenic alopecia and found the formulation to be stable and viable for compounding.
2 citations
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January 2022 in “Materials today: proceedings” This study suggests that caffeine may enhance hair growth and be beneficial for cosmetic applications due to its high binding affinity to keratin, but further validation is needed.
35 citations
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January 2018 in “Skin pharmacology and physiology” This study found that nanoemulsion formulations with oleic acid or eucalyptol significantly enhanced the delivery and retention of caffeine through hair follicles and surrounding skin regions.
15 citations
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October 2020 in “European journal of pharmaceutics and biopharmaceutics” This study reported that combining microdialysis and selective follicular closure with varnish significantly reduces caffeine penetration through hair follicles in an ex vivo porcine ear skin model.
94 citations
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May 2011 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” This study found that hair follicles contribute significantly to caffeine absorption shortly after topical application, with a faster absorption rate compared to the stratum corneum.
153 citations
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October 2012 in “Skin Pharmacology and Physiology” This review discusses the use of caffeine in cosmetics for its fat-reducing, antioxidant, and hair growth properties, but reports no new research findings.
21 citations
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January 2017 in “Skin Pharmacology and Physiology” In this noninferiority study, researchers found that a 0.2% caffeine-based topical liquid was not less effective than 5% minoxidil solution in improving hair growth in men with androgenetic alopecia over six months.
1 citations
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July 2017 in “Journal der Deutschen Dermatologischen Gesellschaft” Topical caffeine improves hair loss intensity, speed, and shedding, and works better with minoxidil/azelaic acid.
46 citations
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January 2008 in “Journal of cosmetic dermatology” Caffeine and siloxanetriol alginate caffeine in emulsion form can reduce fatty cell size and number, potentially treating cellulite effectively.
182 citations
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December 2007 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” This study demonstrated that hair follicles significantly expedite the absorption of caffeine through the skin compared to interfollicular pathways.
82 citations
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May 2009 in “BJCP. British journal of clinical pharmacology/British journal of clinical pharmacology” The study reported that combining the Follicular Closing Technique with the Franz diffusion cell is a valuable method for investigating follicular caffeine penetration in vitro, though kinetics differ from in vivo results.
35 citations
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June 2017 in “Pharmaceutical research” This study presented a new two-dimensional model that successfully predicts transdermal permeation of caffeine, highlighting the significant role of the follicular pathway in increasing systemic bioavailability.
32 citations
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December 2017 in “Journal of Drug Delivery Science and Technology” This study found that co-delivery of minoxidil and caffeine in transfersomes with an optimized polysorbate formulation enhanced hair length and weight in vivo.
31 citations
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February 2019 in “International Journal of Cosmetic Science” This study found that ultraviolet radiation negatively affects hair follicle functions in human scalp skin, and caffeine application may provide some protective effects against this damage.
14 citations
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April 2019 in “Saudi pharmaceutical journal” This study reported that microparticle-loaded emulsions containing caffeic acid achieved more homogeneous distribution and prolonged release in hair follicles, suggesting potential for effective folliculitis treatment.
11 citations
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July 2012 in “International Journal of Trichology” Caffeine may help hair growth in hereditary hair loss.