Investigate the potential causes of erectile dysfunction (ED) with a simple blood test. This test helps uncover underlying health factors that could be affecting your sexual well-being.




Erectile Dysfunction Blood Test
- Results estimated in 3 working days
- Convenient testing options
- Bespoke doctor’s report
- Free delivery
Includes testosterone, prolactin, HbA1c (diabetes risk), cholesterol, and cardiovascular health markers.
How do you want to take your sample?
Please choose one option below-
Book a venous draw at a clinic Venous+£35Visit one of our national clinic partners for a nurse to take your venous blood sample from a vein in your arm. We’ll email you instructions on how to book after we’ve processed your order.
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Book a venous draw at home with a nurse Venous+£59Book a home nurse appointment for a nurse to take your venous blood sample from a vein in your arm.
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Self-arrange a professional sample collection VenousFreeMake an appointment at a phlebotomy clinic to have your venous blood sample taken. You will be responsible for arranging your appointment and any additional fees.
18+ Only. T&Cs apply.
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Go beyond the numbers
Get ready to elevate your health understanding with a personalised doctor's report. Go beyond results and tap into expert insights tailored just for you.
- Actionable advice
- Expert support
- Tailored recommendations

How it works
You have the flexibility to choose what works best for you. Enjoy the comfort of having a friendly nurse visit your home for a quick blood draw, opt for a convenient visit to one of our nationwide partner clinics, or self-arrange a draw at a location that suits you.
Take control of your health with Medichecks – order your blood test today!

Track, improve, and monitor your health over time.
MyMedichecks is your personal online dashboard where you can view your results, access clear and simple explanations about individual health markers, monitor changes in your health, and securely store information about your medical history, lifestyle and vital statistics.
Supported by a team of specialist and qualified doctors
Dr Natasha Fernando
Medical DirectorDr Tina Ghela
Digital Clinician LeadDr Susanna Hayter
Digital Clinician
What's in the test?
Cholesterol status
Total cholesterol
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LDL cholesterol
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Non-HDL cholesterol
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HDL cholesterol
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Total cholesterol : HDL
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Triglycerides
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Diabetes
HbA1c
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A raised HbA1c result points to diabetes or an increased risk of developing diabetes, which can have a significant impact on your lifespan and quality of life. Complications of uncontrolled diabetes include heart disease, kidney disease, eye problems, and vascular conditions. It can also contribute to mental health problems. And men with diabetes are three times more likely to have erectile dysfunction. Keeping your HbA1c within a normal range can help you reduce the risk of these conditions.
Hormones
Testosterone
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Prolactin
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Thyroid hormones
TSH
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How to prepare for your test
Prepare for your Erectile Dysfunction Blood Test by following these instructions. Take your sample between 6am and 10am. Avoid vigorous exercise or sexual activity for 48 hours beforehand – both can raise your prolactin level. Avoid nipple stimulation or heavy meals before taking the test, as these can increase prolactin levels. Avoid fatty foods for eight hours before your test, you do not need to fast. Do not take biotin supplements for two days before this test, discuss this with your doctor if it is prescribed. If you take thyroxine, you can take your medication as usual, either before or after your blood test. However, if you take desiccated thyroid extract (DTE) or liothyronine, it's best to take it after you've collected your sample. Please let us know in your supporting information if you take amiodarone or lithium as these can affect your thyroid function results.
Test limitations
Reviews
FAQs
What causes erectile dysfunction?
Our Erectile Dysfunction Blood Test investigates several underlying health conditions that could be contributing to your ED symptoms. These include high cholesterol, diabetes, thyroid conditions, and hormone imbalances.
The good news is that although these physical causes can be serious, they are treatable, and can often be improved by lifestyle changes and/or medication.
What can I learn from an Erectile Dysfunction Blood Test?
ED has many different causes, and often, several factors could play a part. It could be a sign of an underlying health condition like heart disease, diabetes, or a thyroid condition. ED can also be caused by a hormonal imbalance, such as low testosterone.
Other potential causes include taking certain medications like diuretics and antidepressants, lifestyle factors such as being overweight and smoking, and mental health issues including anxiety and depression. Being over 40 also puts you at higher risk of ED.
What is erectile dysfunction?
Erectile dysfunction (or impotence) is when you’re either unable to get an erection or keep an erection for long enough to have sex. Sometimes you might also have a low sex drive (loss of libido).
Occasional ED is very common and is usually nothing to worry about. It’s often caused by a short-term issue such as stress or drinking too much alcohol.
However, for some men, ED can become a long-term problem. This can be very distressing and not only impact your sex life but could also affect your confidence and self-esteem.
What are the symptoms of erectile dysfunction?
You may have ED if you regularly have:
-Trouble getting an erection
-Difficulty maintaining an erection
-Reduced interest in sex
If you have any of these symptoms regularly, you should speak to your doctor to check the underlying cause and see if treatment is required.
How common is erectile dysfunction?
Can erectile dysfunction be cured?
Can I take an erectile dysfunction test at home?
Can I improve erectile dysfunction naturally?
Although medication may be the best treatment for some cases of ED, there are still many things you can do that could help reduce your symptoms naturally.
Healthy lifestyle changes can sometimes help, such as losing weight if you’re overweight, stopping smoking, drinking less alcohol, and taking steps to reduce your stress levels. These changes can also help boost your libido (sex drive).
Can erectile dysfunction be a sign of heart disease?
Trouble getting or keeping an erection may seem like a problem that’s just ‘down there’, but it can be a sign of heart disease Getting an erection depends on a healthy blood flow, so anything that interferes with that flow can cause problems.
Atherosclerosis (where your arteries become narrowed, making it difficult for blood to flow through them) accounts for up to half of cases of ED. And high blood pressure is the next most common cardiac cause.
With cardiovascular disease accounting for most cases of ED, it’s important to check out any underlying causes as soon as possible.
What are the treatments for erectile dysfunction?
If you’re diagnosed with ED, there are many treatment options. If your ED is caused by high cholesterol, you may be prescribed medications such as statins, which can lower levels of bad cholesterol in your blood.
There are medications for hormonal imbalances such as testosterone replacement therapy (TRT). Another standard treatment for ED is sildenafil (Viagra), which increases blood flow to the penis.
Talking therapies like cognitive behavioural therapy (CBT) or counselling may be recommended if your doctor thinks your ED could be due to a psychological issue.
Why have the male reference ranges for testosterone changed?
The reference range for testosterone has been adjusted to have a lower limit of 12 nmol/L to reflect guidance from the British Society for Sexual Medicine (BSSM) 2022.
Our medical advice regarding testosterone levels remains the same and we advise that if your total testosterone level is between the range of 8-12 nmol/L and you have symptoms of low testosterone you may be considered eligible for testosterone replacement therapy. If your testosterone level falls within this range but you have no symptoms this is considered satisfactory and no further action is required.