Low iron levels in the blood can cause severe fatigue.
血液中铁含量低会导致严重的疲劳。
2
Because blood is so rich in iron - and because the body has difficulty excreting excess iron - any animal that consumes blood regularly runs a risk of iron overdose.
由于血液富含铁，而身体要排出过量的铁并非易事，所以任何经常食用血液的动物都有含铁过量的危险。
3
Red blood cells contain hemoglobin — a red, iron-rich protein that gives blood its red color.