The findings of a new study indicate that a diet high in carbohydrates can moderately raise blood pressure (BP) in patients with type 2 diabetes. The study compared the effect of 2 same-calorie diets: one high in carbohydrates (55% of calories) and one lower (40% of calories). Forty-two patients with type 2 diabetes were studied for two 6-week periods, one period on each diet, with a 1-week break in between. Patients were then invited to continue the second diet for an additional 8 weeks. Thirteen patients continued eating the high-carb diet, while 8 stayed on the low-carb diet.
At the end of the 8-week extension, the high-carb diet was associated with a diastolic BP that was 7 points higher than at the end of the initial 6-week phases; systolic BP was 6 points higher in this group, and heart rate was higher by 7 to 8 beats per minute.
In contrast, the low-carb diet group showed a significant lowering of heart rate, compared with the end of the 6-week phases, and both BP measurements were 3 to 4 points lower after a total of 14 weeks on the low-carb diet.
According to researchers from the University of Texas Southwestern Medical Center at Dallas, "the most plausible mechanism for an increase in BP and heart rate on a high-carbohydrate diet might be the accentuation of high insulin levels." The findings were reported in the November issue of Diabetes Care.
In Seniors: Consider CMV Serostatus
When Recommending Flu Vaccine
Older people who have cytomegalovirus seem to have less robust responses to the trivalent influenza vaccine than those who do not have CMV.
News from the year's biggest meetings
Clinical features with downloadable PDFs