Vitamin D is best known for keeping bones strong, but researchers have discovered that its job does not stop there.
This important nutrient helps many organs work properly and may even support heart health by helping the body regulate blood pressure.
Our bodies naturally make vitamin D when sunlight reaches the skin.
It is also found in oily fish, egg yolks, fortified dairy products, plant-based milks, and some breakfast cereals. Even so, many people do not get enough vitamin D because they spend more time indoors or have limited sun exposure.
Blood pressure measures the force of blood moving through the arteries. When it stays too high for many years, it damages blood vessels and increases the risk of heart disease, stroke, kidney damage, and other serious health problems.
Scientists have found that vitamin D appears to interact with a hormone system called the renin-angiotensin-aldosterone system, or RAAS.
This system helps control blood pressure. Too much activity in this system causes blood vessels to narrow and the body to hold onto extra fluid, making blood pressure rise. Research suggests vitamin D may help reduce this activity by lowering renin levels.
Vitamin D may also help protect the cells lining blood vessels, allowing arteries to relax and expand more easily. Better blood vessel function may support healthier circulation and reduce stress on the heart.
Although these findings are promising, researchers emphasize that vitamin D is only one piece of the puzzle. Studies have shown mixed results when testing vitamin D supplements for lowering blood pressure.
Healthy eating, limiting salt, staying physically active, controlling body weight, and avoiding smoking remain some of the most effective ways to protect heart health.
People should not take large doses of vitamin D unless advised by their healthcare provider. Too much vitamin D can also cause health problems. The goal is to maintain healthy levels through a combination of sensible sunlight exposure, nutritious foods, and supplements when needed.
Research published in several medical and cardiovascular journals continues to explore this connection. As scientists learn more, vitamin D may become an increasingly important part of preventing heart disease alongside other healthy lifestyle habits.
If you care about blood pressure, please read studies about how diets could help lower high blood pressure, and 3 grams of omega-3s a day keep high blood pressure at bay.
For more health information, please see recent studies about how tea and coffee influence your risk of high blood pressure, and results showing this olive oil could reduce blood pressure in healthy people.
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