Who can donate blood? Advantages of blood donation

Every blood donor is a life saver. It is the real act of humanity. Sometimes money cannot save life but, donated blood can. The blood you donate gives someone another chance of life.

Who can donate blood

  • The donor must be 18-65 years old and should weigh a minimum of 50 kg.
  • Pulse rate - between 50 and 100 without irregularities.
  • Hemoglobin level - 12.5 g/dL to 17.5 g/dl.
  • Blood pressure- Diastolic: 50-100 mm Hg, Systolic: 100-180 mm Hg.
  • The donor should not have consumed alcohol in the last 12 hrs.
  • The donor should not be suffering or had fever within the last 3 days.
  • The donor should not have transfused blood within last 6 months.
  • No history of major surgery in the last 1 year and no history of minor surgery in the last 3 months.
  • No history of jaundice in the last 5 years.
  • No history of malignancy/unexplained weight loss/ Diabetes/Epilepsy/ Leprosy/Endocrine disorders/drug addiction
Advantage of Blood Donation

How many ml of blood a donor can donate

A standard amount of blood which can be donated by a healthy person is 450 ml. Transfusion therapy in the past was largely dependent on the use of whole blood. Modern transfusion therapy is to use the specific blood component that is clinically indicated.

Advantages of component separation

  • Can benefit more than 1 patient.
  • Concentrated form of required component is administrated.
  • Risk of circulatory overload is reduced.

Components of blood

Whole blood is separated into components

  • Packed red blood cells
  • Platelet concentrates
  • Fresh Frozen plasma
  • Cryoprecipitate

Advantages of blood donation

  • Donating blood doesn't just benefit recipients but also benefits the donors by reducing stress and improving the emotional wellbeing.
  • Blood donation may lower the risk of heart disease and heart attack. This is because it reduces the blood's viscosity. A study proved that regular blood donors have significantly lower total cholesterol and low-density lipoprotein levels as compared to non-donors.
  • It reduced the iron levels of the body. High blood iron can cause a variety of symptoms, such as irregular heartbeats, lethargy, muscle weakness, hardening of arteries, accelerated cholesterol oxidation, decreased libido etc. When blood is donated, 225 to 250 mg of iron is removed from the body. Therefore, it reduces the risk of health complications. A study found out that those who donated blood bi-annually had reduced their risk of cancer and mortality as compared to those who did not, because of decreased iron levels.


A few donors have dizziness, head-ache and nausea. These symptoms will usually go away within 3 days of Blood donation. Blood Donation will cost you nothing but it can save a life. There is a hope of life to someone in your blood donation. Donate blood and be a hero of someone's life.

Dr. Elakkiya Ilavarasan - pathologist

Article by Dr. Elakkiya Ilavarasan, MD pathologist with experience in laboratory medicine for four years. She has interest in haematology, clinical pathology, cytology, histopathology and transfusion medicine. Her idea is to develop knowledge in the inborn errors of metabolism with the latest technologies.


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