Anemia has many types, among which patients with iron deficiency anemia need iron supplementation treatments. If choosing oral supplementation or dietary iron supplementation, it's advised not to drink tea. This is because the tannins in tea can chelate with iron, affecting iron absorption. Therefore, it is not recommended for patients with iron deficiency anemia to drink tea while taking dietary iron supplements and oral iron supplements. However, patients receiving intravenous iron supplementation, or those with other types of anemia, can drink tea without any impact.