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Breastfeeding
Found to be Protective Also
Toddlers who consume large amounts of
margarine and foods fried in vegetable oil may be
twice as likely to develop asthma as their peers
who eat less of these foods.
Diets high in polyunsaturated fat -- found in margarine,
vegetable and sunflower oils -- boost levels of omega-6
fatty acids in relation to levels of omega-3 fatty acids.
Omega-6 fatty acids contribute to the production of compounds
involved in inflammation and may therefore contribute to
inflammation of the airways. Omega-3 fatty acids -- found
in fish inhibit inflammation.
The investigators also found that children who were breast-fed
in the first weeks of life had a lower
asthma risk. They note that previous studies
have also linked breast-feeding with lower asthma risk,
possibly because breast milk provides immune factors not
present in formula.
The authors estimate that a high intake of polyunsaturated
fat accounts for 17%
of asthma cases in the study, and not breast-feeding can
be blamed for 16%
of cases.
Thorax
August, 2001;56:589-595
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