Nature CommunicationsReal-time nanomolar vitamin monitoring in sweat using an electrochemical skin-attached deviceXue WangYuzhuo WangYuxin LiYujiao SunPeiyuan MaoSimiao LiuJieying OuXuemei WangFazheng RenHao Zhang2026-04-23Full textDOI https://doi.org/10.1038/s41467-026-72356-1