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Increased calcium intake may lengthen life

Increased calcium intake may lengthen life

New evidence suggests that children who have a diet high in calcium and who consume dairy products may have a lower mortality rate compared with those who do not, according to research published ahead of print in the journal Heart.

A 65-year follow up of a study into the eating habits of families carried out in the 1930s found that dairy products and a diet high in calcium made a difference to how long people lived.

Although the practice of giving extra milk to school children has been common in Europe since the 20th century, debate continues over the long-term health effects of doing so and what are safe intake levels.

Researchers from the Queensland Institute of Medical Research, Brisbane in Australia, and the Department of Social Medicine, University of Bristol, carried out a 65-year follow-up of a study done in the 1930s.

In 1937-39, children from 1,343 families in England and Scotland took part in a study of family food consumption assessed from 7-day household food inventories. The data came from the Carnegie (“Boyd Orr”) survey of diet and health in pre-war Britain.

The international team of researchers managed to ascertain what had happened to 4,374 of these children between 1948 and 2005. By 2005, 1,468 (34%) of them had died, including 378 deaths due to coronary heart disease and 121 deaths due to stroke.

The researchers looked at two main outcomes – deaths due to stroke and cardiovascular disease – and analysed associations between total dairy intake and mortality, and associations between individual dairy food groups and mortality.

The researchers found that there was no clear evidence that intake of dairy products was associated with coronary heart disease or stroke deaths.

However, childhood calcium intake was inversely associated with stroke mortality but not heart disease mortality.

Children who were in the group that had the highest calcium intake and dairy product consumption were found to have lower mortality rates than those in the lower intake groups.

Heart

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