Can a complete blood test find any disease?

No. It checks a broad set of parameters, but it does not replace targeted tests and cannot on its own exclude every health problem.

Yes. The profiles in this category require 8 to 12 hours of fasting. You can drink water during that time.

What does the urine test add?

It can show protein, blood, glucose, white blood cells and other abnormalities that do not appear in a blood sample. Collecting it correctly is important.

Is the metabolic blood test better than the full one?

Not in absolute terms. It adds insulin, HOMA-IR, glycated haemoglobin and high-sensitivity CRP because it answers a specific metabolic question.

General blood tests

A general blood test brings together full blood count, glucose, cholesterol and markers of kidney, liver and thyroid function to give a broad overview. There is no single complete test of everything: each profile selects some tests and leaves others out.

At Análisis Médicos we have designed a basic check-up, another that adds ferritin and urine, and a third focused on the metabolic and inflammatory picture. The choice depends on what you want to check, not only on the number of parameters.

General blood tests available

If you are not sure which one suits you, there is a guide below the list to help you choose.

How it works

You can order any of our general blood tests without your doctor having to request it:

Price: From €59.00
Prescription: Not needed
Appointment: Not needed
Results: 1-2 working days

Your test request, in minutes. Order the profile you want and it arrives in your inbox straight away, with the preparation instructions.
Wherever suits you, with no appointment. You can have your test at any of the 45 partner centres, and the laboratory emails you the results within a few days.
With an invoice. When you order, you receive an invoice you can submit if you have reimbursement health insurance. How it works, step by step.

How to choose your general blood test

This is not medical advice and does not replace a consultation: it is the reasoning I would use to choose, in case it helps you decide which one to order.

For a general blood check-up, the basic general blood test brings together full blood count, glucose, lipid profile, kidney and liver function, uric acid and TSH.

If you also want to include iron stores and urine, the full general blood and urine check-up adds ferritin, electrolytes and urinalysis with sediment.

When the main question is metabolic, the metabolic and inflammatory blood test adds insulin, HOMA-IR, glycated haemoglobin and high-sensitivity CRP. It is not a better version for everyone, but a profile with a different focus.

Dr. Antonio Mas

What a general blood test usually includes

The full blood count counts and describes the blood cells. Glucose and the cholesterol and triglycerides profile give metabolic information. Creatinine and estimated glomerular filtration rate are used to assess kidney function, while transaminases and other enzymes are part of the liver check.

TSH assesses thyroid function. Ferritin, when included, helps estimate iron stores. Each test answers a question and should be read together with the others, not as an isolated label.

What it means for a blood test to be complete

Complete does not mean that it excludes every disease or measures everything there is. In this category it describes a profile broader than the basic one, with blood and urine. A targeted assessment can be more useful than that profile if there is already a specific question.

Urine adds information that does not appear in blood, but it does not turn the profile into a universal test for urinary infection. White blood cells or blood can appear because of sample contamination, menstruation, exercise and other causes.

More parameters do not always bring more clarity

Metabolic and inflammatory markers can be useful when that is the question. Out of context, a small abnormality can lead to repeat tests without leading to a clear decision. Nor does a normal blood test on its own guarantee that there is no health problem.

Before your blood test

All three profiles require 8 to 12 hours of fasting. You can drink water. Avoid alcohol and intense exercise the day before.

If the profile includes urine, bring a sample of your first urine of the morning or collect it at the centre following its instructions. If you are menstruating or have urinary symptoms, say so, because it may be better to postpone that sample.

If you have recently had a fever, an infection or inflammation, check the preparation for the metabolic and inflammatory profile before measuring high-sensitivity CRP.

Frequently asked questions

What does a general blood test include?: It depends on the profile. The basic one brings together full blood count, glucose, cholesterol and markers of kidney, liver and thyroid function. The broader versions add ferritin, urine or metabolic markers.
Can a complete blood test find any disease?: No. It checks a broad set of parameters, but it does not replace targeted tests and cannot on its own exclude every health problem.
Do I have to fast?: Yes. The profiles in this category require 8 to 12 hours of fasting. You can drink water during that time.
What does the urine test add?: It can show protein, blood, glucose, white blood cells and other abnormalities that do not appear in a blood sample. Collecting it correctly is important.
Is the metabolic blood test better than the full one?: Not in absolute terms. It adds insulin, HOMA-IR, glycated haemoglobin and high-sensitivity CRP because it answers a specific metabolic question.

If you already have your results

A figure only makes sense in its context. Medical history, symptoms, medication and the conditions of the sample can change what it means. Results are assessed in a consultation; this page is for comparing and ordering profiles.

The laboratory sends you the results directly. You can then review them with the professional of your choice.

See general blood tests

Guide reviewed by Dr. Antonio Mas, specialist in Endocrinology and Nutrition, Spanish medical licence no. 080846289, in September 2026.

And if you were looking for something else, here are all the blood tests in the catalogue, grouped by topic.