Emphasize to them that these substances can hurt him, can make him sick, can cause decreased lung function and problems playing sports, and that it is OK to say no. (verywellfamily.com)
The form of Vitamin E called gamma - tocopherol in the ubiquitous soybean, corn and canola oils is associated with decreased lung function in humans, the study reports. (sciencedaily.com)
But it can lead to complications like decreased lung function, heart valve infection, and hepatitis. (health.com)