April 05, 2011
Rising Vitamin D Correlated With Lower Blood Pressure

In an observational study those who experienced rising blood vitamin D during the study period also experienced declining blood pressure.

A lack of vitamin D, even in generally healthy people, is linked with stiffer arteries and an inability of blood vessels to relax, research from the Emory/Georgia Tech Predictive Health Institute has found.

The results add to evidence that lack of vitamin D can lead to impaired vascular health, contributing to high blood pressure and the risk of cardiovascular disease. Study participants who increased their vitamin D levels were able to improve vascular health and lower their blood pressure.

This was not an interventional study. So it does not prove that vitamin D lowers blood pressure. It could be that, for example, some study participants started jogging outside (where the sun raised their skin vitamin D synthesis) and the exercise improved their cardiovascular systems enough to lower their blood pressure.

Participants whose vitamin D levels increased over the next six months, either from dietary supplements or ample sun exposure, tended to improve their measures of vascular health and had lower blood pressure. Forty-two study participants with vitamin D insufficiency whose levels later went back to normal had an average drop in blood pressure of 4.6 millimeters mercury.

"This was an observational study, rather than an interventional one, and it was difficult to tease out how the people who restored their vitamin D levels got there," Al Mheid says. "We are hoping to conduct a study where we have participants take a defined regimen of vitamin D."

But if your blood pressure is too high vitamin D might help.

Share |      Randall Parker, 2011 April 05 11:31 PM  Aging Diet Heart Studies


Comments
Jake said at April 6, 2011 5:06 PM:

Vitamin D stimulates the production of adiponectin. (This is a good thing.) Adiponectin naturally reduces blood pressure. Bringing my Vitamin D up to a optimum level of 70 reduced my systolic blood pressure by 10 points. Life would be so much better if the medical profession understood biochem1stry.

Gary Gagliardi said at April 7, 2011 11:26 AM:

However, be ware of confounding factors in statistical analysis. Another factor, say, warm climates, may cause both effects -- increase vitamin D and decrease blood pressure.

Mike Shearn said at April 7, 2011 12:30 PM:

Helllooooo!?!?!? Didn't you ever here of "Changes in Latitude, Changes in Attitude"? This correlation has been known by Parrotheads for decades.

Mike Shearn said at April 7, 2011 12:31 PM:

Hear, not hear. Sorry.

Mike said at April 7, 2011 12:32 PM:

Here, not hear. I can't type.

Mike said at April 7, 2011 12:35 PM:

I need to quit drinking. (This is all a joke, people. Of course I would say that.)

Waldo's Not Here said at April 7, 2011 1:26 PM:

Yeah, it would be interesting to know if only naturally-produced vitamin-D had the effect or if taking supplements would also help. Something else I read recently - that HDL cholesterol levels raised via drugs were NOT as effective in removing LDL cholesterol from the blood as HDL produced naturally (say, because of exercise)- leads me to suspect that the naturally-produced vitamin-D would be the better bet. Plus, with the other benefits of jogging in the sunshine, the choice should be easy for those who are up to it.

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