Dietary salt restrictions linked to metabolic syndrome
On several occasions, we have reported on the current research linking reduced salt consumption with increased plasma aldosterone levels and their negative health consequences . We have done this as transparently as possible because this observed phenomenon is never considered by salt-reduction advocates. They focus uniquely on blood pressure as a cardiovascular risk factor to the exclusion of all else. It is little wonder that they are at a loss to explain why more people on low salt diets are apt to die than those on regular salt diets. In fact, the BPO (Blood Pressure Only) anti-salt advocates are likely to totally ignore the LSHD (low-salt, high death-rate) linkage.
Well, the LSHD linkage is not going away. The scientific evidence is mounting as can be seen in the most recent publication of Atherosclerosis . In an article entitled, "Dietary salt restriction increases plasma lipoprotein and inflammatory marker concentrations in hypertensive patients," author Edna Nakandakare and co-authors describe the impacts of placing people on low-salt diets .
Their research demonstrated that serum triglycerides, chylomicron-cholesterol, tumor necrosis factors, renin activity, aldosterone and insulin values all increased. They concluded that reduced salt intakes induced alterations in the plasma lipoproteins and in inflammatory markers that are common features of the metabolic syndrome. Metabolic syndrome is the combination of medical disorders that increase the risk of developing cardiovascular disease and diabetes.
It should be noted that this most recent example of the negative impact of reduced salt intakes also showed a drop in blood pressure. This was expected. The difference between this study and the countless salt-reduction advocacy papers that we have seen over the years is that this research went way beyond BPO. It looked at a great many other health outcomes. That's what overall health is - a composite of discrete health effects.
When reduced salt consumption is studied and a composite of health impacts is considered, the overall balance is negative. Yes, blood pressure may drop with reduced salt consumption, but at the same time, there is a cascade of negative health impacts that result on an overall negative health impact. The LSHD phenomenon is not an artifact - more and more research is taking place that will establish its reproducibility beyond any doubt.
It remains to be seen whether the scientists chosen to develop the new set of Dietary Guidelines will adequately consider this phenomenon in their evaluations - lives may depend on it.
