Blood Type – O Negative

Blood types are classified based on the presence or absence of specific antigens on red blood cells. These antigens are identified as A, B, AB, or O. On top of that, each blood type can be either Rh-positive or Rh-negative. O negative is one of the rarest and most valuable blood types, and it is often referred to as the universal donor blood type.

What Makes O Negative Unique?

The reason O neg blood is so valuable is because it can be given to anyone regardless of blood type. When a person receives a blood transfusion, their immune system can react to foreign red blood cells. However, because O negative blood does not have A or B antigens or Rh factors, it is the safest choice in an emergency when the recipient’s blood type is unknown

In situations where someone has a rare blood type or requires a blood transfusion before their type can be determined, O neg blood can be a lifesaver. That’s why hospitals and blood banks always need a supply of O- blood on hand.

Who Has O Negative Blood?

It’s a rare type. Only about 6.6% of the world’s population has O negative blood. It is most commonly found in people of European descent, with a prevalence of around 9%, but it can also occur in people of African and Asiatic descent. 1 in 7 British people have O negative blood. Additionally, O- blood is more common in people with O blood type in their family history.

What Are the Health Risks Associated with O Negative Blood?

While O neg blood can be a lifesaver in emergency situations, it also poses some unique health risks for the people who have it. Because it does not contain the A or B antigens or the Rh factor, it can be difficult for people with O negative blood to receive blood transfusions if they need them. This can make surgeries and other medical procedures more complicated. The NHS is always calling for blood donors with this type of blood to step forward to forward and donate.

In addition, O negative blood is also associated with an increased risk of certain medical conditions, such as autoimmune disorders and blood cancers. However, more research is needed to fully understand the relationship between O negative blood and these conditions.

Discovering Your Blood Type

So how do you know if you have O neg blood? You might have found out sometime through your medical history. But many people just don’t know. There do exist various methods for determining your blood type. It is crucial to be aware of your blood type to prevent the possibility of receiving a blood type that is incompativel if a transfusion is required. The mixing of incorrect blood types can result in clumping of blood cells, which could potentially be lethal. So, it’s good to know.

In case you are unaware of your blood group, you can make an appointment with your local doctor’s clinic or blood donor centre to try and learn your blood type. (Note: Your GP may not be inclined to conduct a blood test when it is not necessary. It’s a nightmare trying to get a GP appointment as well, which is another discussion!!)

The easiest way to find out your blood type is to take a home test. For this, we recommend using the eldon blood typing kit, an inexpensive product that produces results in minutes. Plus, you can get tested at home as soon as the package arrives from Zoom Health, and you won’t have to wait days or weeks for a doctor’s appointment.


O negative blood is a rare and valuable blood type that can be a lifesaver in emergency situations. While it poses some unique health risks, it is the safest option for blood transfusions when the recipient’s blood type is unknown. If you have O negative blood, you can make a difference by donating blood regularly and helping to ensure that there is always a sufficient supply of this life-saving resource.

Home Blood Group Test Kit

A Home Blood Type Test Kit can help identify if you have Type O- Blood

The Home Blood Group Test Kit from Zoom Health allows you to easily identify if you have Type O- blood. This easy-to-use kit enables you to determine your ABO and Rhesus (D) blood types from the comfort of your home. Knowing your blood type is crucial in various situations, such as emergencies requiring blood transfusions or when traveling abroad. A kit like this is simple to use and will give you peace of mind in minutes.

Here’s how the kit works in simple steps:

  1. Prick your finger with the provided lancet to draw a small drop of blood.
  2. Transfer the blood onto the test card using the applicator sticks.
  3. Add a few drops of water to the colored reagent spots on the card.
  4. Tilt the card in different directions to allow the blood to mix with the reagents.
  5. Interpret the results by comparing the color changes to the provided guide.

Knowing your blood type can be lifesaving in emergencies, as it helps medical professionals quickly identify compatible blood for transfusions. It’s also useful when planning to donate blood or if you need to undergo certain medical procedures. Additionally, carrying a blood group card while traveling can expedite medical care in case of an unexpected accident or illness abroad.

At Zoom Health we always have these Home Blood Group Test Kits in stock and ready for quick delivery. When you place your order, they aim to ship the same day using Royal Mail 24, ensuring you receive your kit in 1 or 2 days max.

Don’t wait until an emergency arises. Order your Home Blood Group Test Kit today from Zoom Health and gain peace of mind by knowing your blood type.

Photo by Anthony Cunningham for Zoom Health

Zoom Health is a leading UK supplier of Home Health Tests and Earplugs

This post was originally published in June 2023.

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