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This review discusses caffeine's potential role in treating androgenetic alopecia by counteracting DHT effects on hair follicles and enhancing cell proliferation, but reports no new clinical results.

This study found that a once-daily 5% minoxidil topical foam is as effective as a twice-daily 2% minoxidil topical solution for hair growth in women with androgenetic alopecia, with fewer side effects and greater styling convenience.

This study measured caffeine content in ethanolic extracts of robusta coffee beans, finding 221.58 mg of caffeine per gram of extract, which aligns with known levels for Coffea canephora.

This review discusses current topical treatments, natural products, and complementary therapies for androgenetic alopecia, but it reports no new clinical results.

In this systematic review, the researchers observed that topical caffeine preparations appear safe and effective against hair loss, but most studies had low-quality evidence due to design flaws, indicating the need for better-designed trials before drawing definitive conclusions.

Caffeine in Alpecin shampoo may help prolong hair root activity and reduce hair loss.

This review summarizes preclinical and clinical information on herbal products for hair loss treatment, highlighting their mechanisms, follicular penetration, and potential side effects, suggesting they may offer alternatives to synthetic drugs with fewer side effects.

This study established a stable formulation for caffeine nanocrystals in specific solvent mixtures, which could be used to test their potential for enhanced hair follicle targeting and penetration.

This study found that while caffeine and adenosine can inhibit hair loss and stimulate hair growth, more research is needed to fully understand the efficacy of shampoo formulations containing specific proportions of these compounds for hair loss treatment and prevention.

This study found that rubbing significantly increased skin permeation of caffeine but not rhododendrol, with the direction of rubbing playing a crucial role in caffeine's enhancement.

In this study, topical application of 45% robusta green coffee bean extract in male wistar rats did not significantly enhance hair growth but effectively inhibited the increase of 5α-reductase type 1 levels when exposed to testosterone.

This review highlights caffeine's diverse benefits in cosmetics and nutricosmetics, noting its antioxidant properties, ability to treat skin disorders like androgenic alopecia, and potential to enhance sunscreen effectiveness, though penetration into deeper skin layers remains challenging.

This review highlights the potential of plant-derived molecules like Epigallocatechin-3-Gallate and Ginsenosides to promote healthy hair growth by enhancing nutrient supply and blood flow to the scalp, and notes their growing role in natural hair care product development.

This review discusses the use of phosphodiesterase inhibitors for alopecia, finding promising preliminary results with topical caffeine for androgenetic alopecia and telogen effluvium, but limited success in alopecia areata.

This review discusses treatment options for female pattern hair loss, emphasizing the importance of early intervention and the benefits of combined therapies, but reports no new clinical results.

In this study, magnesium was observed to penetrate human skin, with hair follicles significantly aiding this process depending on the concentration and duration of exposure.

This study found that formulation factors like pH, viscosity, and chemical enhancers can significantly influence intrafollicular hydrocortisone permeation in vitro, with higher pH and enhancers reducing follicular contribution.

This review discusses the potential benefits of phytochemicals for hair care and emphasizes the need for more robust preclinical and clinical studies, without reporting new clinical results.

This study found that the cyanoacrylate biopsy method could effectively evaluate drug distribution in hair follicles, suggesting its potential utility for assessing topically applied chemicals targeting hair follicles.

This study demonstrated that caffeine, minoxidil, and the HIF-1α-stimulating agent deferiprone significantly enhanced dermal papilla cell proliferation in a 3D culture model, suggesting deferiprone as a potential alternative to minoxidil.

Caffeine can damage hearing cells and affect hearing recovery after ear trauma.

The conclusion is that a new method can measure caffeine and drugs in hair, finding caffeine abusers have 70 times more caffeine than normal, with a proposed cut-off value for abuse.

This study found that a novel shampoo formulation effectively delivers caffeine to hair follicles, with 8–9% of absorbed caffeine reaching the follicles, suggesting it may support hair retention by enhancing antioxidant activity.

In this study, the authors found that applying hypobaric pressure to the skin significantly increases the transdermal permeation of large molecules by enhancing diffusion, despite the associated skin stretching and hair follicle enlargement not fully explaining this effect.

This study found that a combination of azelaic acid, minoxidil, and caffeine significantly reduced skin flap necrosis in rats, likely by increasing nitric oxide content and iNOS expression, compared to individual treatments.

In this study, researchers using a UVB-induced mouse model identified the gene COL7A1 as a novel marker for hair luster, finding that minoxidil, caffeine, and biotin effectively restored its expression, indicating potential therapeutic strategies.

This study developed caffeine-loaded nanoparticles coated with ultradeformable liposomes for better hair follicle delivery, showing non-cytotoxicity and potential to reduce oxidative stress in DHT-damaged cells, suggesting an alternative treatment for androgenetic alopecia.

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.

This research describes a process for producing caffeine nanocrystals, which may enhance skin penetration by accumulating in hair follicles and maintaining stability for two months, paving the way for in vivo testing.

This review explores the effects of caffeine on cancer, cardiovascular, immunological, inflammatory, and neurological diseases, including its use in sports, and discusses advancements in caffeine delivery through novel nanocarrier-based formulations.