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Rumor Refutation：8 Rumors About Voluntary Blood Donation

Rumor 1 :Blood drawing requires fasting, and so does blood donation.

 Blood drawing for tests usually requires fasting, but blood donation is different and does not necessitate fasting. On the contrary, donating blood on an empty stomach can lead to low glucose levels in the blood, potentially causing adverse reactions such as dizziness due to hypoglycemia.

To ensure that blood donors are in good physiological condition during donation and to avoid excessively high plasma lipid levels due to excessive nourishment, donors should maintain a light diet and sufficient sleep the day before donating blood.

Rumor 2 : Donating blood voluntarily can lead to illness.

/✗:This is a wrong statement

One reason some people hesitate to donate blood is the fear of infection. However, the blood collection needles, blood bags, and consumables used by current blood collection agencies are all qualified products that have undergone national quality inspection and strict sterilization and disinfection.

The principle of "one needle per person" is strictly enforced, with needles disposed of after use and consumables undergoing centralized (harmless disposal). Therefore, donating blood at a formal blood bank is safe and will not transmit diseases.

Rumor 3 :Blood donation can cause anemia.

/✗:This is a wrong statement

Human blood has a regenerative function. After donating a small amount of blood, the missing blood cells will be quickly replenished through the body's self-regulation, and anemia will not occur.

Rumor 4 :Replenishing nutrition after blood donation can lead to obesity.

/✗:This is a wrong statement

The amount of blood required for blood circulation in the human body remains constant. Donating a small amount of blood will be replenished by the body within a short period.

This slight increase and decrease have no direct causal relationship with weight changes. People who worry about gaining weight after donating blood should eliminate unnecessary concerns.

Rumor 5 :Blood donation may affect fertility.

/✗:This is a wrong statement

A person's fertility depends on the normal development of the reproductive system and the conditions for the growth and development of the fertilized egg, not directly related to blood donation.

Rumor 6 :After blood donation, a large amount of nutrition needs to be supplemented to reduce damage.

/✗:This is a wrong statement

Given current living standards, dietary structures, and nutritional status, healthy adults do not need to supplement various nutrients after donating blood.

Rumor 7 :Blood donation can cause unstable blood pressure.

/✗:This is a wrong statement

Individual donors may experience slightly higher or lower blood pressure after donating blood, which can also occur when a person is nervous or excited.

Normal blood donation does not affect blood pressure. If this occurs, simply resting and maintaining emotional stability will quickly restore blood pressure to normal levels, without causing pathological hypertension or hypotension.

Rumor 8 :When a person loses blood, their immunity decreases, and they lose many white blood cells.

/✗:This is a wrong statement

Blood donation does not affect the human immune system. Physiologically, the main substance (constituting) human immunity is white blood cells. Red blood cells make up a larger proportion of human blood, while white blood cells are only a part of it.

For example, a normal adult donating 200-400ml of blood will only lose 1%-2% of their total white blood cells, which can be replenished 

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