Vitamin D Supplementation May Help Lower Blood Pressure in Older Adults with Obesity
A new study published in the Journal of the Endocrine Society has found that supplementation with vitamin D plus calcium can help lower blood pressure in older adults with obesity. According to researchers, taking vitamin D supplements may improve blood pressure control by regulating the body's calcium levels and influencing the renin-angiotensin-aldosterone system.
The study aimed at 221 individuals aged 65 and older with high blood pressure who were taking vitamin D supplements. Half of the participants took a dose of 600 IU (the recommended daily dose) per day, while the other half received a higher dose of 3,750 IU per day, both accompanied by 250 mg of calcium citrate.
Researchers found that supplementation with either dose significantly reduced systolic blood pressure and diastolic blood pressure by 3.5 mm Hg and 2.8 mm Hg, respectively. However, the study indicated that higher doses of vitamin D did not provide greater benefits compared to lower doses.
The researchers attributed these findings to the role of vitamin D in regulating calcium levels in the body, which is crucial for healthy blood vessel function. Vitamin D also has anti-inflammatory properties and can influence the renin-angiotensin-aldosterone system, a key regulator of blood pressure.
Lead researcher Geiga explained that inadequate levels of vitamin D can impair blood vessel health and contribute to high blood pressure in individuals with obesity. Furthermore, fat cells can store vitamin D, reducing its availability to the body, making it more common for people with obesity to experience vitamin D deficiency.
To apply these findings to daily life, experts recommend determining if an individual is low in vitamin D through a simple blood test. If levels are deficient, supplements or natural sunlight exposure can help improve vitamin D status. However, supplementation should not be the only approach; maintaining regular physical activity, adopting a heart-healthy diet, and effective weight management are all essential for long-term benefits on blood pressure control.
"We need to consider vitamin D as part of a broader strategy to manage blood pressure rather than treating it with supplements alone," said Dr. Rita Hawle, a clinical dietitian and nutritionist.
With the potential benefits of vitamin D supplementation in lowering blood pressure, patients should consult their healthcare provider about determining an appropriate dose for optimal results while avoiding the risk of calcium accumulation in the body.