Respuesta :
The answer would be: iron; red meat
Iron is needed to form heme part of hemoglobin. Hemoglobin is the molecule from red blood cells that could carry oxygen and carbon dioxide. Food that rich in iron should be red meat or liver. Only a few vegetables have high iron like spinach. A person with low red meat diet (like in vegetarian) will have high risk of iron deficiency.
Iron is needed to form heme part of hemoglobin. Hemoglobin is the molecule from red blood cells that could carry oxygen and carbon dioxide. Food that rich in iron should be red meat or liver. Only a few vegetables have high iron like spinach. A person with low red meat diet (like in vegetarian) will have high risk of iron deficiency.