Ya-Cieh Hsu
Ya-Cieh Hsu is a researcher at Harvard University who has investigated the role of stress in hair and skin changes. She is part of a team that has confirmed stress as a significant factor in hair graying, contributing to the understanding of how external pressures affect pigmentation.
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Turkey:
Prof. Ya-Cieh Hsu stated that they are now certain that stress is the main culprit for changes in hair and skin.
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