Original sentence: In addition, another potential risk is the possibility of vitamin poisoning from taking large doses of supplements which contain significant amounts of vitamins (particularly vitamin D) in addition to omega-3 fatty acids, or heavy metal poisoning by the accumlation of traces of heavy metals, particularly mercury, in concentrated fish oil supplements
Edited sentence: In addition, another potential risk is the possibility of vitamin poisoning from taking large doses of supplements which contain significant amounts of vitamins in addition to omega-3 fatty acids