Levels of creatine, organic contaminants and heavy metals in creatine dietary supplements

► A survey on quality of creatine supplements commercialised in Italy has been carried out. ► Creatinine resulted to be the major organic contaminant (44% of the samples over 100 mg/kg). ► 50% of the products exceeded the maximum level recommended by EFSA for organic contaminants. ► Among heavy metals, only mercury was present in detectable amounts (<1 mg/kg).