Can I Give Blood
, by Andrew Odgers, 21 min reading time
Giving Blood
Can I give blood?
Most adults in the UK can give blood. The main requirements are age between 17 and 66, a minimum weight of 50kg, and good general health on the day. Certain medical conditions, medications, recent travel and other factors may mean a temporary or permanent deferral. Checking eligibility takes minutes and most people who want to donate will be able to. Every donation can save up to three lives.
The full answer
Who can give blood in the UK
Age requirements
You must be at least 17 years old to give blood in the UK. If you are donating for the first time, the upper age limit is 66. People who have donated before can continue up to the age of 70 provided they have given blood within the last two years. Donors over 70 are assessed on an individual basis.
Weight requirements
You must weigh at least 50kg to donate whole blood. This threshold exists to ensure the volume taken is safe relative to your total blood volume. Donors close to the minimum weight may be asked to confirm their weight at each visit. There is no upper weight limit for donation provided you are in good general health.
General health on the day
You must feel well on the day of donation. Attending with a cold, flu, sore throat or any active infection means your appointment should be rescheduled. Donation puts mild temporary stress on the body, so attending in good health ensures your safety and the quality of the donation.
First-time donors
First-time donors are welcome at any NHS donor centre. You will complete a health questionnaire, have a brief finger-prick test to check haemoglobin levels, and speak with a nurse before donating. The whole process takes around an hour including the 10 to 15 minute donation itself and a rest period afterwards.
How often you can donate
Men can give blood every 12 weeks. Women can give blood every 16 weeks. These intervals allow haemoglobin levels to recover fully between donations. If you attend before the recommended interval, staff will check your levels and may advise you to return at a later date.
Common restrictions
When you cannot give blood
A number of circumstances mean you cannot donate, either temporarily or permanently. Many deferrals are temporary and you will be eligible again after a waiting period.
Recent travel to certain countries
Travel to malaria-risk regions requires a waiting period before donation. The standard deferral is six months after returning from a malaria-risk area where you had no symptoms. If you had symptoms of malaria, the deferral extends to three years after treatment and confirmation you are clear. The NHS blood service maintains an updated list of affected countries.
Tattoos and piercings
A four-month wait is required after receiving a tattoo or piercing anywhere in the UK. This allows time to confirm no blood-borne infection was transmitted. After the waiting period, provided the site has healed cleanly, donation is permitted without further restriction.
Recent surgery or medical procedures
Major surgery requiring a general anaesthetic means you must wait at least six months. Minor procedures under local anaesthetic have shorter waiting periods, ranging from one week to several months depending on the type of operation. Always inform donation staff of any recent procedures.
Pregnancy and recent birth
You cannot give blood during pregnancy. You must wait a minimum of six months after giving birth, miscarriage or termination before donating. This protects your own recovery and the quality of any donation made.
Certain medications
Many medications do not affect eligibility. Blood thinners, certain antibiotics and some treatments for acne or prostate conditions require waiting periods or may mean permanent deferral. The NHS blood service provides a comprehensive medication lookup tool at blood.co.uk. Declaring all medications during the health questionnaire ensures you receive accurate advice.
Blood transfusions received in the UK after 1980
Anyone who received a blood transfusion in the UK after 1 January 1980 cannot donate. This precautionary restriction relates to the theoretical risk of variant Creutzfeldt-Jakob disease. Transfusions received outside the UK are assessed on an individual basis.
Ready to donate
Book your blood donation appointment
Finding your nearest donor centre and booking an appointment takes just a few minutes online. Whole blood, platelets and plasma donations are all needed throughout the year.
Specific groups
Eligibility for specific groups
Some groups have specific criteria that are worth understanding before attending an appointment.
LGBTQ+ donors
The UK changed its blood donation policy in 2021. All donors, regardless of sexual orientation or gender identity, are now assessed using the same individual risk-based questionnaire. Previous blanket restrictions on men who have sex with men were replaced with questions about sexual behaviour that apply equally to all donors. If you have had a new sexual partner or more than one partner in the last three months you will be asked to defer for three months.
People with diabetes
Diabetes managed by diet or tablets does not prevent donation in most cases. Those who use insulin may be able to donate depending on their circumstances. Donation staff will assess your individual situation. Well-controlled diabetes does not automatically prevent donation.
People with high blood pressure
High blood pressure that is well controlled with medication does not automatically prevent donation. Your blood pressure will be checked at the appointment. If it is above the acceptable threshold on the day you will be asked to return when it has come down. The acceptable range is below 180 systolic and 100 diastolic.
People who have had cancer
Eligibility after cancer depends on the type of cancer and treatment history. Certain solid tumours with no recurrence after a defined period may allow donation. Blood cancers including leukaemia, lymphoma and myeloma are a permanent deferral. The donation team at your centre can advise based on your specific diagnosis and treatment history.
Visitors from abroad
People who have recently lived in or made repeated trips to areas with variant Creutzfeldt-Jakob disease risk face different rules depending on their personal history. The questionnaire at your appointment will capture the relevant information and staff will advise accordingly.
Practical steps
Preparing for your appointment
A little preparation makes the donation experience smoother and reduces the chance of deferral on the day.
Drink plenty of water beforehand
Being well hydrated before your appointment helps veins become more visible and makes the blood draw easier. Aim to drink an extra 500ml of water in the two hours before arriving. Avoiding alcohol for 24 hours before donation is also recommended.
Eat a meal before donating
Do not attend your appointment on an empty stomach. Eating a regular meal containing iron-rich foods in the hours before helps maintain haemoglobin levels. Low haemoglobin is one of the most common reasons for deferral on the day and is easily avoided.
Wear loose clothing on the arm
Wear a top with sleeves that roll up easily above the elbow. Tight sleeves make the process more difficult. Comfortable clothing overall helps you relax during the donation.
Bring identification if it is your first visit
First-time donors may be asked for identification. A driving licence, passport or NHS letter with your name and address are all acceptable. Registration can also be completed online before arriving to save time at the centre.
Allow enough time
Plan for the whole visit to take around one hour. The donation itself takes 10 to 15 minutes. The health questionnaire, haemoglobin check and post-donation rest period account for the remaining time. Rushing away immediately after donation is not advisable.
Safety
When to speak to a doctor before donating
Most people do not need to see a doctor before giving blood. Speak to your GP before attending a donation appointment if any of the following apply.
- You have a complex or undiagnosed medical condition. Donation staff are equipped to handle common conditions but your GP can advise whether donation is suitable for your specific situation.
- You are taking multiple medications. If you are unsure whether your medication list affects eligibility, your GP or pharmacist can clarify before you attend.
- You have recently recovered from a serious illness. Major illness requiring hospitalisation will likely mean a temporary deferral, but your GP can confirm when it is safe to donate again.
- You feel unwell in the days leading up to your appointment. Rescheduling is straightforward and far preferable to attending and being deferred or feeling poorly after donation.
- You have concerns about needle procedures. Vasovagal reactions (feeling faint) are common and manageable. Staff are experienced in supporting nervous donors, but speaking to your GP beforehand may provide reassurance.
Giving blood is safe for the vast majority of healthy adults. The donation team completes a thorough health check before every donation and will always act in your best interest. If there is any doubt about your eligibility on the day, staff will advise you clearly and arrange for you to return when the time is right.
For more guides on giving blood, our Giving Blood hub covers everything from what to expect at your first appointment to the types of donation available.
Part of the hub
Back to the Giving Blood Hub
This article is part of our complete giving blood knowledge base, covering eligibility, preparation, what happens on the day, recovery, types of donation and the science behind why blood is so urgently needed.
Keep reading
Related giving blood guides
Eligibility connects to several related topics. What to expect when you give blood in the UK walks through the full appointment process. Is giving blood healthy covers what donation does for your body and for recipients. And How often can you give blood explains the donation intervals in detail.
Frequently asked
Questions about giving blood eligibility
Can I give blood if I take medication?
It depends on the medication. Many common medications do not prevent donation. Some medications, including blood thinners and certain antibiotics, require a waiting period or permanent deferral. NHS Blood and Transplant maintains a full medication list at blood.co.uk. Declaring all medications at your appointment allows staff to advise accurately.
Can I give blood if I have had a tattoo or piercing?
Yes, after a waiting period. In England, Scotland and Wales you must wait four months after a tattoo or piercing before donating. After this period, providing the area has healed cleanly, donation is permitted.
Can I give blood if I have had cancer?
It depends on the type of cancer and treatment history. Some people who have had certain cancers can donate once they have been in remission and treatment-free for a specified period. Blood cancers such as leukaemia or lymphoma are a permanent deferral. The NHS blood donor team can advise on individual circumstances.
Can I give blood if I am pregnant or have recently given birth?
No during pregnancy. You must wait at least six months after giving birth, miscarriage or termination before donating. This waiting period protects both your own recovery and the integrity of the donation.
Can I give blood if I have diabetes?
Often yes. People with diabetes managed by diet or tablets can usually donate. Those using insulin may be able to donate depending on circumstances. The nurse at your appointment will assess your individual situation. Well-controlled diabetes does not automatically prevent donation.
Can I give blood if I have had a blood transfusion?
No, if you received a blood transfusion in the UK after 1 January 1980. This restriction relates to the theoretical risk of variant Creutzfeldt-Jakob disease. Transfusions received outside the UK or before this date are assessed individually.
How long after surgery can I give blood?
You must wait at least six months after major surgery involving a general anaesthetic. Minor surgery and procedures under local anaesthetic have varying waiting periods, typically from one week to six months depending on the type of procedure. Staff at your appointment will advise based on your specific operation.