August 2013 in “Han'gug saengmul gonghag hoeji/KSBB journal” This study found that callus extracts from apple 'Hirosaki' may improve collagen synthesis, hair follicle cell proliferation, and possess significant anti-inflammatory properties.
August 2024 in “Cosmetics” This study reported that peanut callus extract, rich in resveratrol, significantly stimulated hair growth and reduced hair loss in an in vitro model and a clinical trial, showing promise as a cosmetic bioactive ingredient.
April 2024 in “The journal of phytopharmacology” This study found that extracts from orchid calluses can stimulate hair follicle growth and enhance the proliferation of hair follicle stem cells in vitro, suggesting potential applications in sustainable hair care products using natural bioactive compounds.
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September 2019 in “South African Journal of Botany” This study found that Teucrium polium L. subsp. geyrii Maire extract demonstrated a large safety margin in acute and subacute toxicity tests on mice and significantly enhanced wound healing in rats, especially with callus extract, by improving cell proliferation and wound contraction.
February 2014 in “아시안뷰티화장품학술지” This review discusses various natural extracts, such as peppermint, rosemary, wild cultivated ginseng, and others, for their potential hair growth promotion effects and calls for further exploration into combinations with fewer side effects.