Livestrong claim:
You can now lower your blood pressure by consuming apple cider vinegar. Other herbs, foods and dietary changes can assist in increasing the effectiveness of the vinegar. You can take a shot of it diluted in water or use it as a seasoning on uncooked or lightly cooked foods. The reason why the vinegar is best uncooked is because it retains its nutrients and fermentation when not cooked above 116 degrees F.
I found this Web MD reference:
Another study in rats found that vinegar could lower high blood pressure. A large observational study also found that people who ate oil and vinegar dressing on salads five to six times a week had lower rates of heart disease than people who didn't. However, it's far from clear that the vinegar was the reason.
But I cannot find a study on humans. So can taking a bit of apple cider vinegar a day lower blood pressure in humans?