One major aspect in controlling ones BP is to lower salt intake. Salt basically increases the reaction of the blood vessels to contrict or “close” – raise your BP then increase the pressure of the heart in pumping blood out of the circulation which in the long term cause heart failure or heart enlargement. As a precaution, we always warn patients from enjoying too much salt.
Now comes an interesting study published in Circulation in June 2010 looking at another aspect of food that we know should be avoided if one has high sugar…but now is known to affect and lower ones BP also.
BACKGROUND: Increased consumption of sugar-sweetened beverages (SSBs) has been associated with an elevated risk of obesity, metabolic syndrome, and type II diabetes mellitus. However, the effects of SSB consumption on blood pressure (BP) are uncertain. The objective of this study was to determine the relationship between changes in SSB consumption and changes in BP among adults.
METHODS AND RESULTS: This was a prospective analysis of 810 adults who participated in the PREMIER Study (an 18-month behavioral intervention trial). BP and dietary intake (by two 24-hour recalls) were measured at baseline and at 6 and 18 months. Mixed-effects models were applied to estimate the changes in BP in responding to changes in SSB consumption. At baseline, mean SSB intake was 0.9+/-1.0 servings per day (10.5+/-11.9 fl oz/d), and mean systolic BP/diastolic BP was 134.9+/-9.6/84.8+/-4.2 mm Hg. After potential confounders were controlled for, a reduction in SSB of 1 serving per day was associated with a 1.8-mm Hg (95% confidence interval, 1.2 to 2.4) reduction in systolic BP and 1.1-mm Hg (95% confidence interval, 0.7 to 1.4) reduction in diastolic BP over 18 months. After additional adjustment for weight change over the same period, a reduction in SSB intake was still significantly associated with reductions in systolic and diastolic BPs (P<0.05). Reduced intake of sugars was also significantly associated with reduced BP. No association was found for diet beverage consumption or caffeine intake and BP. These findings suggest that sugars may be the nutrients that contribute to the observed association between SSB and BP.
CONCLUSIONS: Reduced consumption of SSB and sugars was significantly associated with reduced BP. Reducing SSB and sugar consumption may be an important dietary strategy to lower BP.
What does this study tell us:
That of the >800 adults in the study: that drinking one less sugar-sweetened beverage a day resulted in the lowering of both systolic and diastolic BP by about 1.2 mm Hg and 1.1 mm Hg over 18 months period of observation.
I am actually not surprised by this relationship. We all know, anytime a patient has high BP, I always make sure he is not at risk to become diabetic with high cholesterol since the three always come in groups and are always partners in crime. So controlling for one may result in the improvement of the other. So any dietary intevention that I do for my patients incorporate for the control of the three conditions.
Remember: For every 3-mm-Hg reduction in systolic BP : the risk of dying from stroke is reduced by 8% and the risk of dying for heart disease is redcued by 5%. So any small amount of decrement is worth it!
There you go guys: another reason to cut down on SUGAR!