Determination of nine chemicals illegally added into antifatigue health foods by UPLC-MS/MS Rapid determination of 15 chemical drugs illegally added into slimming Chinese patent medicines and health foods by UPLC-MS/MS A preliminary investigation on safety evaluation system for health foods Rapid determination of 17 anti-inflammatory and analgesic chemicals illegally added into Chinese patent medicine and health foods by UPLC-MS/MS Rapid determination of 34 chemicals illegally added into Chinese patent medicines and health foods with blood pressure lowering function by UPLC-MS/MS