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This narrative review reports that well-selected plant extracts and their active compounds may improve hair health by promoting hair growth and preventing hair loss, potentially aiding in developing targeted therapies for alopecia.

The researchers found that plant extracts from Papaver rhoeas L., Clitoria ternatea L., and Carthamus tinctorius L. are effective natural cosmetic dyes, offering intense and stable colors without cytotoxicity.

This study found that Nelumbinis Semen extract may promote hair growth and reduce hair loss by increasing VEGF and IGF-1 expression and decreasing TGF-β1 in human dermal papilla cells and mice.

This study found that ingesting Lactobacillus paracasei HY7015 and Lycopus lucidus Turcz. extract promoted hair regrowth and follicle maturation in mice by enhancing cytoprotective effects and growth factor expression.

This study found that hair care products containing fermented papaya, fermented mangosteen, and caffeine significantly inhibited hair loss, increased hair density and thickness, and improved hair follicle structure in individuals with androgenic or diffuse alopecia over three months compared to placebo and caffeine controls.

In this study, onion (Allium cepa) extracts promoted hair growth in an alopecia model in mice, with the effect appearing unrelated to the presence of the polyphenol quercetin.

This study used an ex vivo human skin model to show that tropical conditions disrupt skin homeostasis, resulting in epidermal thickening and junctional flattening, and found that Kombucha tea extract may help preserve skin structure under such stress.

This review highlights the potential of microalgae as sustainable sources for nutraceuticals and cosmeceuticals, emphasizing their applications in functional foods, dietary supplements, and cosmetics for roles such as anti-aging and photoprotection in alignment with sustainability principles.

This study found that extracts from heterotropic cultures of Scenedesmus deserticola JD052 enhanced hair-inductive properties in human dermal papilla cells more effectively than photoautotrophic extracts, likely through activation of AKT/β-catenin signaling, despite similar loliolide content.

In this study, researchers found that fermented ginsenoside from kimchi-derived bacteria enhanced hair growth in a mouse model and increased hair cell proliferation by 25% in vitro, suggesting potential as a therapeutic candidate for promoting hair growth.

This study found that the water extract of Cacumen Platycladi promotes hair growth and follicle development in mice, possibly by influencing dermal papilla cells through the Akt/GSK3β/β-Catenin signaling pathway.

This study suggests that Equisetum debile extracts, particularly the ethyl acetate fraction, may offer natural cosmeceutical benefits for treating hyperpigmentation, delaying skin aging, and remediating hair loss due to androgenic alopecia.

This study found that Myrtus communis leaf extract significantly decreased IL-1α and increased VEGF gene expressions in human keratinocytes, which may relate to the plant's traditional uses for hair loss and wound healing, though further research is needed to explore these effects.

This study found that both alcoholic and aqueous extracts of Punica granatum L. showed potential for promoting hair growth and exhibited anti-lice and antidandruff activities in a mouse model.

This study found that coffee berry extract demonstrated anti-aging properties in skin and hair cells, showing significant anti-collagenase activity and stimulating hair-related gene expression, suggesting its potential for use in cosmeceuticals.

This study found that extracts from the rice variety Bue Bang 3 CMU, particularly the husk and bran, demonstrated antioxidant, anti-inflammatory, and anti-androgenic properties, suggesting potential use in treating androgenetic alopecia.

This research reported that KDML105 bran extract demonstrated antioxidant activities, reduced nitric oxide production, and influenced gene expression related to the hair cycle in cultured dermal papilla cells, suggesting potential as an anti-hair loss agent by supporting the anagen phase and angiogenesis.

In this study, Nigella sativa oil was found to promote dermal papilla cell proliferation and may reduce oxidative stress, suggesting its potential as a hair loss intervention.

This study found that fermented Flammulina velutipes polysaccharides showed higher antioxidant and anti-inflammatory capacities than non-fermented ones, suggesting potential use in functional foods and health products.

This study suggests that guava leaf extract may inhibit hair loss by downregulating genes involved in androgen synthesis, potentially offering a natural alternative for treating androgenetic alopecia.

In a study on mice, cow placenta extract showed strong antioxidant activities and reduced collagen damage, suggesting it could help delay skin aging caused by D-galactose.

In this study, Allium hookeri extract increased viability and size of dermal papilla cell spheroids and reduced oxidative stress effects, potentially promoting hair growth by regulating specific protein signaling pathways in human cells.

This study demonstrates that pea sprout extract promotes hair growth by activating specific signaling pathways and providing antioxidant and anti-inflammatory effects, suggesting its potential as a natural alopecia treatment.

In this study, the researchers found that Astragalus sinicus extracts improved wound healing, reduced oxidative stress, and activated crucial signaling pathways in dermal papilla cells damaged by dihydrotestosterone, suggesting it may be a promising ingredient for hair loss treatment.

This study found that Kyoh®, a flavonol-rich extract from rocket leaves, may promote hair growth by enhancing the expression of hair growth-related genes in laboratory conditions.

This study found that the fermented black soybean product GR-SC65 reduced particulate matter-induced cell death and oxidative stress in A549 cells, suggesting potential as a therapeutic agent for lung injury prevention.

This study found that fermenting Dendrobium officinale with Lactiplantibacillus plantarum CCFM8661 and other strains increased polysaccharide yields and skin care activity, particularly with CCFM8631, which showed significant improvements in skin cell protection and inflammation reduction in both cell cultures and mouse models.

This study developed a herbal shampoo using fermented oryza sativa water and natural ingredients like amla and aloe vera, reporting that it effectively removes sebum, filth, and dandruff while promoting hair growth and strengthening.

This study found that the methanolic heartwood extract of Avicennia marina significantly inhibits 5α-reductase type 1, reducing 5α-DHT production by 52% in a cell-based assay with human hair dermal papilla cells.

This study found that a mixture of Red-BCQ and Agnex extract promoted greater hair growth and antioxidant effects in C57BL/6 mice compared to other groups, including minoxidil treatment.