"

 improper referrals 

the section titled ""Elimination of systemicc free radicals contains the sentence ""Since reactive oxidative species (ROS) like sunlight and carcinogens lead to the formation of free radicals, inhibition of free radicals therefore decreases the risk of tumoric growth."" Sunlight is certainly not a free radical and not all carcinogens are either. This sentence makes no logical sense and should be re-written by the author to better express their argument.  "