NUTR 1010 Lecture Notes - Lecture 28: Antioxidant, Ceruloplasmin, Goitre
29 Mar 2017
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Document Summary
Required in amounts less than 100 mg per day. Trace elements have been very difficult to study as they are difficult to remove from the diet. Involved in the functioning of over 300 different enzymes ( E. g. superoxide dismutase, important for protecting cells from free radical damage from oxidative stress. The synthesis of metallothionein, which binds zinc and limits its uptake into the blood, increases the synthesis of metal. Cchs suggests that a # of canadians are not meeting their zinc requirements. Richest sources of zinc are animal products. Better absorbed from animal sources than plant sources. Persons with gastrointestinal diseases (poor absorption ) Often bound by phytates(storage form of phosphorus) reducing its bioavailability. Vegetarians are more vulnerable to having inadequate zinc intakes. Vegans may be 50% more vulnerable due to lower bioavailability of zinc from vegan sources. Canadian regulations require some foods to be fortified with zinc. Nausea, vomiting, loss of appetite, abdominal cramps, diarrhea, headaches.
