Objective Since immigration from a third world country to a Western society might be associated with an increased incidence of blood pressure associated diseases, we tested the hypothesis that immigrants from Afghanistan to Denmark exhibit a higher blood pressure (BP) than non- immigrant Danes and more so with age. Methods and results 24-h ambulatory BP (24-h BP) was measured in 40 citizens of Afghan (Afghans) and 40 citizens of Danish (Danes) origin, and each group was divided into young (20-30 y, n=20) and older (40-60 y, n=20) individuals. In addition, a salt sensitivity test was conducted in both of the young groups in half of the subjects. 24-h mean arterial pressure (24-h MAP) was lower in young Afghans than in young Danes (84 ± 2 vs. 89 ± 1 mm Hg, p = 0.002) as well as in older Afghans compared to in older Danes (89 ± 2 vs. 99 ± 1 mm Hg, p < 0.001) and the rise with age was only significant in Danes (p < 0.001). In both cases, Systolic arterial pressure (24-h SAP) was more decreased than diastolic (24-h DAP), whereas heart rate (24-h HR) was similar. None of the young groups responded to the salt sensitivity test. Fasting plasma cholesterol and Gamma Glutamyl Transferase (GGT) were significantly lower among older Afghans than older Danes, whereas body mass index (BMI) was similar. Conclusion The hypothesis was not confirmed. The lower BP in the Afghans might be explained by the lower plasma GGT and cholesterol reflecting a healthier life style in what concerns the food composition.