November 2025 in “Journal of English Language and Education” 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.
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December 2022 in “Plants” 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.
September 2025 in “International Journal for Research in Applied Science and Engineering Technology” This paper discusses the potential benefits of incorporating guava leaf extracts into skincare, hair care, and oral care products, highlighting their antibacterial, antioxidant, and acne-treating properties, as well as their possible effects on dandruff removal and hair loss reduction.
July 2026 in “Functional Foods in Health and Disease” In this study, oral administration of strawberry guava extract promoted hair growth in both mice and humans, with active components like adenosine, fructose, digalactosyldiacylglycerol, and pedunculagin contributing by enhancing skin blood flow and activating dermal papilla cells.
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January 2014 in “Jurnal Tata Rias” In this study, the hair tonic with a 3:3 avocado extract to honey ratio was most preferred by panelists and may be suitable for preventing hair loss.