there are 21 but 6 trace elements that are essential.
and they are Zinc , Copper, Selenium, Chromium, Cobalt, and Iodine.
give us three trace elements that are essential. Why are they important to human health?
Copper: plays a very important role in our metabolism largely because it allows many critical enzymes to function properly.
The metal zinc: is an omnipotent metal that has amphoteric nature. Hence, it is ionized either in acidic or alkaline forms.
chromium: The need of chromium is for biosynthesis of glucose tolerance factor. The deficiency causes impairment of glucose tolerance while toxicity results in renal failure, dermatitis, and pulmonary cancer.
what are their sources?
Chromium is present in many foods, including meats, grain products, fruits, vegetables, nuts, spices, brewer's yeast
Whole grains and milk products are good sources of zinc.
Iron is found in animal foods that originally contained hemoglobin, such as red meats, fish, and poultry