Transplanted rat hair follicles grew hair and had increased but not fully restored nerve connections in mice.
April 2018 in “Journal of Investigative Dermatology” Light can activate hair growth through a pathway from the eyes to hair follicles.
260 citations
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January 2020 in “Nature” Stress can cause hair to turn gray by depleting stem cells.
4 citations
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August 2021 in “Frontiers in Cell and Developmental Biology” Stress can cause hair loss by affecting nerve-related hair growth, and noradrenaline might help prevent this.
December 2025 in “Frontiers in Immunology” Restoring nerve-macrophage communication may help treat autoimmune diseases.