Japanese-American Men With Low Vitamin-D Diet Face Higher Stroke Risk

THURSDAY, May 24 (HealthDay News) — Japanese-American men who
don’t eat a diet rich in vitamin D have an increased risk of stroke later
in life, according to a new, long-term study.

The study included nearly 7,400 Japanese-American men living in Hawaii.
They were between the ages of 45 and 68 in the mid- to late-1960s, when
they were first examined and interviewed about their eating habits.

During 34 years of follow-up, 960 of the men suffered strokes. Compared
to those with the highest levels of vitamin D in their diet, men who took
in the least dietary vitamin D had a 22 percent higher risk of stroke and
a 27 percent higher risk of ischemic (blood-clot-related) stroke. No
difference existed for hemorrhagic (bleeding) stroke, however.

The study appeared May 24 in the journal Stroke.

“Our study confirms that eating foods rich in vitamin D might be
beneficial for stroke prevention,” study author Dr. Gotaro Kojima, a
geriatric medicine fellow at the John A. Burns School of Medicine at the
University of Hawaii in Honolulu, said in a journal news release.

Kojima said, however, it’s unclear whether the study findings could be
applied to women or to different ethnic groups.

Sunlight generally is the primary source of vitamin D, but synthesizing
vitamin D from the sun becomes more difficult as people age, Kojima said,
meaning older people need to eat more foods rich in vitamin D or take
supplements. Fortified milk, breakfast cereals, fatty fish and egg yolks
all are good sources of vitamin D.

More information

The U.S. Office of Dietary Supplements has more about vitamin D.

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