Coconut oil not alone but exercise training together has shown to lower blood pressure. This experiment was conducted in hypertensive rats for 5 weeks. It was concluded that the reduction in blood pressure which is caused by this combination can be explained by the increase in the reduced baroreflex sensitivity and by the reduction in oxidative stress in the serum, heart, and aorta. Studies have been done in healthy men and women and similar positive effects have been observed. So yes, coconut oil may reduce blood pressure levels both in mice and humans.