39 citations
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March 2008 in “Growth hormone & IGF research” Raspberry ketone may help grow hair and improve skin elasticity.
2 citations
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October 2023 in “Science advances” Touching hair can activate nearby nerve cells through signals from the hair's outer layer.
135 citations
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December 2013 in “Seminars in Cell & Developmental Biology” Stem cells in the hair follicle are regulated by their surrounding environment, which is important for hair growth.
April 2021 in “Journal of Investigative Dermatology” Bacteria can help skin regenerate through a process called IL-1β signaling.
October 2025 in “JCI Insight” Rosemary extract helps skin heal faster by activating a specific receptor.