'We now know that an increase in asthma coincides with a switch from butter to certain oil-based diets. A large new Northwestern Medicine study ties the increasing consumption of supposedly healthy vitamin rich oils -- canola, soybean and corn -- to the rising incidence of lung inflammation and asthma. All three oils coincidentally come from genetically modified sources.
The new study shows drastically different health effects of soybean, corn and canola oils in comparison to olive oil, the latter which can actually improve lung function.'
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