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Information on the latest vitamin D news and research.

Find out more information on deficiency, supplementation, sun exposure, and how vitamin D relates to your health.

Low vitamin D in diet increases stroke risk in Japanese-American men

Research published in Stroke, an American Heart Association journal, suggests Japanese-American men who do not ingest adequate amounts of vitamin D are at an increased risk of suffering from a stroke later in life.

The 34 year study included 7,400 Japanese-American men living in Hawaii between the ages of 45 and 68. During the 34 year study, 960 men suffered from a stroke. The men who took in the least dietary vitamin D had a 22% increased risk of having a stroke and a 27% higher risk of ischemic (blood clot-related) stroke, when compared to men with the highest amount of vitamin D in their diet.

The authors stated the results suggest a beneficial effect of vitamin D on stroke risk. Although, they recognized the findings cannot be applied to women or different ethnic groups.

Stroke is one of the most common causes of death worldwide, and currently the 2nd leading cause of death in the US. Risk factors for stroke include high blood pressure, family history of stroke, atrial fibrillation, diabetes, high cholesterol, smoking, obesity, and heavy alcohol consumption. To read more about vitamin D and stroke, visit our member’s blog: The latest on stroke risk and vitamin D


Kojima K, et al. Low Dietary Vitamin D Predicts 34-Year Incident Stroke. Stroke. May 2012.

US News Health.Japanese-American Men With Low Vitamin-D Diet Face Higher Stroke Risk. May 2012.