It is best for women to choose duck blood to replenish qi and blood, because the iron content in duck blood is about 4 times that of pig blood, and the potassium content in duck blood is more than 3 times that of pig blood. Duck blood tastes more delicate than pig blood, which is more attractive to women, especially in hot and sweaty weather, and it can also supplement potassium to avoid severe dehydration. It should be noted that you must go to a formal and hygienic place to buy duck blood, and never buy spoiled duck blood.