Details for the lay reader: https://www.npr.org/2025/09/17/nx-s1-5544145/vitamin-b3-can-help-protect-against-skin-cancer-heres-who-may-benefit https://www.npr.o

Details for the lay reader: https://www.npr.org/2025/09/17/nx-s1-5544145/vitamin-b3-can-help-protect-against-skin-cancer-heres-who-may-benefit https://www.npr.org/2025/09/17/nx-s1-5544145/vitamin-b3-can-...