It has been suggested in previous studies that there could be a link between impaired lung functionand a negative effect on the thinking processes, but it is not clear what the mechanism for that might be.
Some type of parabens are known to disrupt hormone function, an effect that is linked to increased risk of breast cancer and reproductive toxicity, but they are just one type of hormone disrupting chemicals found in cosmetics.
But soon after, I developed a novel mathematical model which can be used by doctors and environmental specialists to quantify the effect of the pollutants on the lung function as measured by the peak expiratory flow rate-- which is essentially how much a person can breathe out in one breath.
The researchers suggest a "small but significant" negative effect of 4% linked to the combined effects of smoking and impaired lung function - itself linked to smoking.
But he said the detrimental effect on cognition could be due to be attributable to poor heart and lung function affecting the brain, or directly harmful effects of smoking on brain - as well as lung - tissue.