The required lemon for the study was purchased from a local market. Turkey is one of the important producers of lemon (González-Molina et al., 2010) and lemon juice used in current study was prepared from domestic harvest. A little sugar was added to lemon juice. Two different sphygmoma- nometers (Spacelabs 90207 and Mobil-O-Graph vers 12) were used for ambulatory BP measurement. We searched Pubmed database using key words hypertension combined with lemon, lemon juice, citrus juice, lime or lime juice with- out any time limitation. Friedman and Mann Whitney U tests were used for statistical analysis, and a P value of less than 0.05 was considered statistically significant. All patients were informed about the study which was approved by the Local Ethics Committee. The present study was supported by On- dokuz Mayis University Research Fund (Samsun, Turkey).