After each phase, participants had to undergo two stress tests, one psychological and one physiological. In the first case, they were to give a speech filmed with video camels, and in the second, they had to keep one foot in ice-cold water. Before and during these tests, the scientists checked the blood pressure of the study participants. In addition, the condition of important blood vessels was ultrasonically checked in some subjects.
The results showed that the average blood pressure at rest and in the stress situations after the walnut diet was significantly lower than in the diet without walnuts and walnut oil. Although the administration of additional linseed oil brought no further improvement in blood pressure, but in the condition of the arteries of the subjects: The ultrasound studies documented after the walnut-rich diet plus linseed oil a better state of the arteries.
The reason for the positive effect of walnuts and also flaxseed the researchers in the high content of antioxidants and unsaturated fatty acids. "The results complement some recent studies that show the beneficial effects of walnuts, especially on blood pressure. Our results show that stress-induced high blood pressure can be alleviated by dieting with walnuts, "says Sheila West. displaySheila West (Pennsylvania State University, University Park) et al .: Journal of the American College of Nutrition dapd / science.de? Martin Vieweg