@Ceptorbi - Iron and vitamin B12 along with folate play important roles in erythropoiesis. A lack of iron in the diet can cause iron-deficiency anemia which involves a lack of hemoglobin to carry oxygen through the blood. Symptoms of anemia include tiredness, weakness, paleness, dizziness, brittle nails, and shortness of breath. Causes of iron-deficiency anemia include blood loss, lack of iron in the diet, and an inability to absorb iron. A vitamin B12 deficiency can also cause anemia. Symptoms of this vitamin deficiency include dizziness, weakness, bruising or bleeding, and stomach upset including constipation and diarrhea. If the deficiency continues untreated, it can also cause nerve damage. Vegetarians are prone to this deficiency since vitamin B12 is typically consumed in animal products like meat and poultry or eggs and milk.
Folate-deficiency anemia occurs when the blood lacks folate or folic acid, a type of B vitamin. This type of anemia results in enlarged red blood cells. Causes include eating undercooked food, dietary lack of the vitamin, alcoholism, and some medications. Symptoms are headache, paleness, tiredness, and mouth or tongue soreness.