What is the weight requirement for women donating blood?

Jun 20, 2025 Source: Cainiu Health
Dr. Liu Feng
Introduction
Under normal circumstances, the weight requirement for female blood donors is 45 kilograms. To ensure the health and safety of blood donors, women must weigh at least 45 kilograms to be eligible for blood donation. Women who are underweight may suffer from malnutrition, low blood pressure, or low blood sugar, and may experience adverse symptoms such as pallor, palpitations, and fatigue after donating blood.

Generally speaking, the weight requirement for female blood donors is 45 kilograms. The detailed explanation is as follows:

Considering the health condition of blood donors, women must weigh at least 45 kg or more to be eligible for blood donation. Women who weigh too little may suffer from malnutrition, low blood pressure, or low blood sugar. After blood donation, they may experience discomfort symptoms such as pale complexion, palpitations, and fatigue. Therefore, to ensure the safety and health of blood donors, this weight requirement has been established.

However, weight is only part of the pre-donation assessment. In addition to weight, donors must also undergo a series of health checks, including blood pressure, hemoglobin levels, and medical history review, to ensure the safety and appropriateness of blood donation. If female donors have any health concerns before donating blood, they should proactively inform the medical staff for more detailed evaluation and guidance.

After blood donation, adequate rest should be maintained, strenuous exercise and heavy physical labor should be avoided, and more foods rich in iron and vitamin C should be consumed, such as beef, lamb, and animal liver, to promote physical recovery.