Welzo Spare Components - Gold and Purple Cap
Welzo Spare Components - Gold and Purple Cap
The Welzo Spare Components – Gold and Purple Cap kit offers essential replacement parts for blood sample collection, ensuring accuracy, hygiene, and compliance with medical-grade standards. These specialised vacutainer tubes are crucial for maintaining sample integrity in home and clinical testing environments. Whether you're replacing components from an existing kit or preparing for additional tests, these colour-coded caps follow strict laboratory protocols to ensure precise and reliable diagnostic results.
The gold cap tube, also known as a serum separator tube (SST), contains a clot activator and gel that separates serum from blood cells. It is commonly used in biochemistry profiles to analyse hormones, vitamins, liver enzymes, and other vital biomarkers. Research from the University of Oxford and clinical guidelines from the NHS Pathology Handbook confirm that SST tubes are essential for tests requiring clean serum separation, particularly in vitamin D, thyroid function, and hormone assessments.
The purple cap tube contains EDTA, an anticoagulant used to preserve whole blood. It is primarily used for haematology testing, including full blood counts, blood typing, and certain genetic or infectious disease screening. According to guidance published by the Royal College of Pathologists, EDTA tubes are critical for maintaining blood cell morphology and preventing clotting during transport, enabling accurate cell analysis and DNA testing. These tubes are used in a wide range of medical diagnostics, from identifying anaemia and infections to investigating chronic fatigue and immune disorders.
What Does It Test For?
The Welzo Gold and Purple Cap tubes support a wide spectrum of diagnostic testing. The gold cap enables serum-based tests that assess biochemical health markers such as vitamin and hormone levels, liver and kidney function, metabolic panels, and cardiovascular risk indicators. These are frequently used in wellness, fertility, and hormonal assessments, which research from Imperial College London has shown to be vital in identifying early signs of chronic disease or hormonal imbalance.
The purple cap supports whole blood analysis, commonly used in full blood count (FBC) tests, which are essential for detecting anaemia, infection, inflammation, and blood cell abnormalities. Studies from the University of Manchester highlight the importance of haematological screening in diagnosing systemic conditions and monitoring overall health status. The EDTA within the purple tube ensures the sample remains viable for accurate cellular and genetic testing.
Together, these components form the foundation of reliable laboratory diagnostics, empowering patients and healthcare professionals to track health markers with clinical precision.
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Biomarkers
Biomarkers
How to take a test
How to take a test
This simple home blood test uses a small finger-prick sample and a lancet device. Collection takes just a few minutes, and results are usually ready within 24–48 hours once your sample reaches the laboratory. Note: This guide is for informational purposes only and not a substitute for professional medical advice. Always follow the instructions provided with your specific test kit. How to Do a Home Finger-Prick Blood Test
Step What to Do What You’ll Need Time 1. Order your test online. Your kit includes lancets, collection tube, alcohol swab, plasters, instructions, and a pre-paid return mailer. Home test kit 1–2 mins 2. Register your test kit using the unique reference number printed on your kit. Enter this number in your online portal before collecting your sample to ensure results are linked correctly. Reference number, online portal 2–3 mins 3. Read the instructions carefully. Hydrate and warm your hands in warm water to help blood flow. Warm water, instructions 3–5 mins 4. Clean one fingertip with the alcohol swab. Twist and press the lancet firmly until it clicks. Lancet, alcohol swab < 1 min 5. Gently massage from your palm toward the fingertip to form blood drops. Let drops fall into the collection tube up to the marked fill line. Collection tube, tissue 2–5 mins 6. Seal the tube tightly, label it, and complete any included forms. Place everything into the protective packaging. Tube cap, label, form 1–2 mins 7. Post your sample using the pre-paid return mailer the same day. Aim to post Monday–Thursday to avoid weekend delays. Pre-paid mailer 1–3 mins 8. The laboratory processes your sample upon arrival. Results are typically ready in your online account within 24–48 hours. Online account Varies
Delivery & Returns
Delivery & Returns
Shipping Information
If you order by 2 p. m. on a weekday, your order will be packaged that day.
If orders come in after 2 p. m., they'll be packed the following workday. Spend over £50 and enjoy free shipping anywhere in the UK.
To ensure your items get to you safely and on time, we usually send them out using trusted courier services, although Royal Mail may also be used.
Most of our customers receive their orders within 1–3 days of sending; however if you reside in an area which is considered remote or lies far away from us, then please bear with us should it take an extra day or two for your parcel to reach you.
When your order is dispatched, you'll get an email telling you this– and if there's tracking available, it'll be included too!
Returns Policy
Our products are meant to empower you regarding your health care; therefore returns are easy and without any cost to you.
You can return your purchase free of charge within 30 days of receiving it back to us in England.
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Clients Love Us
Stephanie L.
"The process was quick and easy. I had results back in two days with helpful insights from a doctor."
Armac Venson
"Everything arrived on time, and the packaging made it feel very professional and secure. Very impressed."
Rachel M.
"Excellent service from start to finish. The instructions were clear, and I felt supported throughout."
Anna Jackobson
"Simple to use and great customer service. I got peace of mind without leaving my house."
Eric X.
"I appreciated how discreet and well-packaged everything was. Made the whole process stress-free."
Anders Elroff
"I’ve tried other services, but none matched the speed and clarity I got from this test. Highly recommend."
How it Works
Order Your Test
Choose your test online and we’ll send you everything you need.
Take Your Sample
Use the simple finger-prick kit to collect your blood sample at home.
Post It Back
Return your sample in the prepaid envelope — no need to visit a clinic.
Get Reviewed Results
Your results are reviewed by a qualified lab technician and delivered securely online.
FAQ's
Do I need to visit a clinic to take the test?
Do I need to visit a clinic to take the test?
No — our tests are designed to be done entirely at home using a simple finger-prick kit. Just follow the instructions and post your sample back using the prepaid envelope.
How long do results take?
How long do results take?
Once your sample reaches our lab, results are usually available within 1–2 working days. You’ll be notified by email and can view everything securely online.
Are these tests verified and reliable?
Are these tests verified and reliable?
Yes. All our tests are processed in UKAS and ISO-accredited laboratories. Our clinical team includes NHS doctors, GPs, and registered nurses, ensuring medical accuracy and professional oversight.