Before a Comprehensive Check-Up: Fasting Rules, Medical Records and Questions Worth Bringing

The appointment letter has been on the fridge for a week, held up by a magnet, and it says one thing in bold: nothing to eat after midnight. Which raises an immediate question at 6 a.m., kettle in hand. Does coffee count? Does a mint? And why does a routine visit suddenly feel like an exam you could fail?

Most people who want to prepare for a health check up are not anxious about needles. They are anxious about getting the small things wrong and wasting the morning: a glucose result thrown off by a biscuit, a blood pressure reading inflated by the stairs, a conversation cut short because the list of questions stayed at home.

The good news is that almost all of this is predictable. A comprehensive check-up is a snapshot of your usual body on a usual day. Preparation is mostly about not smudging the picture, and about arriving with the pieces of your story that only you can supply.

What actually happens at a comprehensive check-up?

A comprehensive check-up is a bundle. It gathers into one visit the things that would otherwise be spread across several: a conversation about your history and habits, a physical examination, measurements such as height, weight and blood pressure, and laboratory tests on blood and urine. Some programs add an electrocardiogram, or ECG, which is a recording of the heart’s electrical rhythm taken through sticky pads on the chest and limbs. Others include imaging when there is a reason for it.

The order tends to be practical rather than dramatic. You check in, a nurse or assistant records vital signs, a phlebotomist draws blood, you provide a urine sample, and then you sit with a clinician who examines you and asks questions. That conversation is the part people underestimate. Lab values are useful, but the story of how you sleep, move, drink, and feel is what turns numbers into decisions.

The purpose of much of this is screening: looking for a problem in someone who feels well, before symptoms appear. The NHS Health Check, for example, is offered to adults aged 40 to 74 without an existing diagnosis of heart disease, diabetes or kidney disease, roughly every five years, and focuses on blood pressure, cholesterol, weight and diabetes risk, according to the NHS. Other countries structure things differently, but the logic is shared: measure the things that change slowly and quietly, and catch drift early.

Expect the visit to be heavy on data collection and light on verdicts. Most results are not ready on the day, so the meaningful explanation often comes later by letter, portal message or a follow-up appointment. Knowing that in advance saves a lot of disappointment in the car park.

How to prepare for a health check up in the week before

Start with the letter or booking message, and read it twice. It should list which tests are planned and whether any require fasting, a full bladder, or a specific time of day. If it does not, call and ask; a two-minute phone call prevents a wasted morning. Where fasting is required, ask for the earliest available slot so that most of the fasting hours overlap with sleep.

Resist the urge to reform yourself for seven days. A week of salads and long walks will not lower your cholesterol meaningfully, and it can hide how your body behaves under ordinary conditions. Clinicians want the real baseline, not the audition version. The one exception is alcohol: MedlinePlus notes that you may be asked to avoid alcohol before some blood tests, so check your instructions and be honest if you have had a drink.

Use the week to gather paper. Write down every medicine, supplement and herbal product you take, using the names on the labels. Note allergies and past reactions. Find previous results if you have them, especially blood pressure and cholesterol readings, so the team can look for a trend rather than a single dot.

Then write your questions, in your own words, on a single sheet. People forget what they meant to ask the moment a clinician says ‘anything else?’. Think about symptoms that have nagged you for months rather than the twinge you noticed yesterday, and about family events, such as a parent’s heart attack, that you may never have mentioned.

Sleep matters more than most preparation. A poor night raises blood pressure and can leave you light-headed after a fasting draw. Lay out loose clothing with sleeves that roll up, set two alarms, and put the water bottle by the door.

Fasting before a blood test: how it works and why it matters

Fasting, in the laboratory sense, means taking in nothing but water for a set period before your blood is drawn. It is not a wellness ritual. It exists because the meal you ate two hours ago is still circulating: glucose rises after carbohydrates, and triglycerides, a type of fat measured in a cholesterol panel, can stay elevated for hours after a fatty meal. If the lab measures those while digestion is under way, the result reflects breakfast rather than you.

How long is long enough? MedlinePlus gives a typical range of 8–12 hours for tests that need it, with the exact window set by your provider. For cholesterol testing specifically, the Mayo Clinic describes the traditional instruction as 9–12 hours without food, while noting that some cholesterol tests can now be done without fasting. That shift matters: guidelines in several countries have moved toward accepting non-fasting lipid results for routine risk assessment, so do not assume every check-up requires an empty stomach. Ask.

Longer is not better. Fasting well beyond the requested window can change results in the other direction, and it makes fainting after a blood draw more likely. The instruction is a target, not a minimum to beat.

Two groups should raise fasting with their care team before the day rather than at the desk. People with diabetes who use glucose-lowering treatment may need a specific plan to fast safely, and that plan belongs to the prescriber. People who are pregnant should mention it, because both the test menu and the interpretation change. In either case, the clinical team decides how, or whether, fasting should happen. Your job is to flag it early.

Which check-up tests need fasting and which do not?

Not every tube needs an empty stomach, and check-up programs often mix fasting and non-fasting tests in one draw. The lab simply asks you to fast for the whole set because that is easier than staggering appointments. The table below shows the usual position for common check-up tests, drawn from the fasting guidance published by MedlinePlus and the cholesterol guidance from the Mayo Clinic. Your own instructions always override it.

Test	Fasting usually needed?	What it measures in plain terms
Fasting blood glucose	Yes	Sugar in the blood after a period without food, used in diabetes screening
Lipid (cholesterol) panel	Sometimes; ask	Total, LDL and HDL cholesterol and triglycerides
HbA1c	No	Average blood sugar over roughly the previous two to three months
Basic or comprehensive metabolic panel	Often	Kidney function, electrolytes, liver enzymes
Complete blood count	No	Red cells, white cells and platelets
Thyroid function	No	Hormones that regulate metabolism
Iron studies, vitamin B12	Sometimes	Iron stores and B12 status
Urine sample	No	Protein, glucose, blood, signs of infection
ECG	No	Electrical rhythm of the heart

Two patterns are worth noticing. Tests that measure something your last meal directly changes, such as glucose or triglycerides, are the ones most sensitive to fasting. Tests that measure something slow-moving, such as HbA1c or thyroid hormones, are barely affected by breakfast at all.

If your program lists only non-fasting tests and still asks you to fast, that is usually about scheduling simplicity. If you would struggle to fast, say so; the team may reorder things rather than lose the data.

Water, coffee, gum and cigarettes: what breaks a fast?

Water does not break a fast, and drinking it is actively helpful. Plain water keeps you from feeling faint and makes veins fuller and easier to find, which shortens the needle part of the morning. MedlinePlus is clear that water is permitted and that nothing else should be eaten or drunk during the fasting window.

Coffee is the question most people actually want answered, and the answer is no, even black. Caffeine and the other compounds in coffee can influence some results, and the point of fasting is to remove variables, not to negotiate with them. Tea, juice, milk and diet drinks fall under the same rule. Sweeteners are not a loophole; they still signal to the digestive system that something is arriving.

Chewing gum and mints are usually excluded for the same reason: they stimulate digestion and many contain sugar or sugar alcohols. Smoking and vaping are commonly asked to be avoided too, partly because nicotine affects glucose handling and partly because both raise blood pressure shortly before a reading.

Brushing your teeth is fine. Just avoid swallowing toothpaste, which is easy enough.

What if you slip? People do. A slice of toast eaten on autopilot at 7 a.m. is not a moral failure, but it is information the lab needs. Tell the phlebotomist exactly what you had and when. Depending on which tests are booked, they may draw the non-fasting tests today and rebook the fasting ones, or run everything and flag the result as non-fasting so that whoever interprets it knows. What causes problems is silence: a triglyceride value that looks alarming because of a hidden croissant can trigger unnecessary worry and repeat testing. Honesty at the desk costs nothing and saves a lot.

Should I take my usual medicines on the morning of a fasting test?

For most people, the instruction is straightforward: take prescribed medicines as normal, with water, unless the team that prescribed them tells you otherwise. Fasting refers to food and drinks other than water; it does not automatically mean withholding treatment. Skipping a blood pressure or heart medicine to get a ‘clean’ result is one of the more common and more unhelpful things people do before a check-up, because it removes the very thing the reading is supposed to reflect.

Some medicines need a specific plan. Treatments that lower blood glucose are the clearest example: taken without food, some of them can drive glucose too low, which is why people with diabetes should ask the prescribing clinician how to handle the fasting morning well before the appointment. Medicines that are meant to be taken with food may also need timing advice. In every case, the person who wrote the prescription makes the call, and any change should come from them rather than from a well-meaning relative or an online forum.

Supplements deserve a mention because they are so often forgotten. High-dose biotin, sold for hair and nails, can interfere with certain laboratory assays, including some thyroid and cardiac tests, producing falsely high or low results, as the NIH Office of Dietary Supplements notes. That does not mean you must stop it; it means the lab should know you take it. The same principle applies to herbal products, protein powders and anything else swallowed with a purpose.

Bring the actual list, written from the labels, including things you take only occasionally. Inhalers, eye drops, patches and creams count. The check-up is a chance to reconcile what is on your record with what is in your bathroom cabinet, and the two are often not the same.

How do I avoid a falsely high blood pressure reading?

Blood pressure is the measurement most easily spoiled by the journey to the clinic. A brisk walk from the car, a flight of stairs, a strong coffee and a full bladder can each nudge the number upward, and together they can push a normal reading into a range that prompts a worried conversation.

The American Heart Association sets out the conditions for a reliable reading: no caffeine, exercise or tobacco in the 30 minutes beforehand, an empty bladder, five minutes of quiet sitting first, back supported, feet flat on the floor, legs uncrossed, and the arm resting at heart level. Talking during the measurement raises the figure, so does a tight sleeve pushed up over the cuff. Arrive ten minutes early and use that time to sit still rather than to fill in forms at speed.

Even with perfect technique, clinic readings often run higher than readings at home. This is sometimes called the white-coat effect, meaning the unfamiliar setting itself raises blood pressure. Clinicians know this, which is why a single elevated reading is not a diagnosis. Guidelines generally call for repeat measurements, and often for home or 24-hour ambulatory monitoring, before hypertension is confirmed.

If you already measure blood pressure at home, bring the log. A month of morning and evening readings is more informative than one number taken under fluorescent lights. Also bring the monitor itself if you can; the team can check it against their equipment and confirm the cuff size fits your arm, since a cuff that is too small reads high.

The aim is not a flattering number. It is an accurate one, so that any decision about your heart rests on solid ground.

What to bring to a check up: records, lists and devices

Think of the appointment as a meeting where you hold half the files. The clinic has your chart; you have everything that happened elsewhere. Bringing that half changes the quality of the conversation.

• A written list of medicines, supplements and herbal products, using the names on the labels, plus how you actually take them, including anything you skip or take irregularly.
• Allergies and previous adverse reactions, with what happened rather than just the name.
• Prior test results, especially cholesterol, glucose, blood pressure and kidney function, so trends can be seen.
• Reports, and where possible the images, from any scans or ECGs done at other services. A report without the pictures is still useful; the pictures without a report are less so.
• Your vaccination history, as far as you know it.
• A home blood pressure log and the monitor, if you use one.
• Notes on family history, covering parents, siblings and children: what they were diagnosed with and roughly how old they were.
• A symptom diary, if something has been troubling you, with dates, triggers and what helps.
• Glasses, hearing aids and any mobility aids you use day to day.
• A snack and a drink for immediately after a fasting blood draw.
• Your written questions, ranked, with the most important at the top.

Consider bringing a companion. A second pair of ears catches things you will not remember, and a trusted person can prompt you about the symptom you were going to leave out. If you would prefer privacy for part of the visit, say so; clinics are used to that.

Wear layers you can remove easily and a top with sleeves that roll above the elbow. Avoid heavy lotion on the chest if an ECG is planned, because the sticky pads need dry skin. Leave the tight jewelry at home if imaging is on the list.

Your family history: the information only you can provide

No blood test can tell a clinician that your father had a heart attack in his fifties or that two aunts developed type 2 diabetes. That knowledge lives in kitchens and photo albums, and it is one of the most powerful pieces of information you will bring through the door. Family history shifts how risk is calculated, how early screening starts, and how a borderline result is interpreted.

The most useful details are specific. Which relative, what condition, and approximately how old they were when it was diagnosed. First-degree relatives, meaning parents, siblings and children, carry the most weight, but grandparents and aunts and uncles still add texture. Conditions that particularly matter include heart disease and stroke, diabetes, high cholesterol at a young age, cancers of the breast, bowel, ovary and prostate, kidney disease, blood clots, and any sudden unexplained death at a young age. Mental health conditions and dementia belong on the list too; they are part of the same picture.

This often requires a phone call before the appointment. Ask a parent or an older sibling what they remember. People are frequently surprised by what emerges: a grandmother’s ‘weak heart’ turns out to have been a valve problem, or a cousin’s early bowel cancer was never mentioned at family gatherings. Write it down, even if the details are hazy. ‘Heart problems, died in his sixties’ is still more useful than a blank.

If you were adopted or do not know your biological family, say so plainly. Clinicians will not fill the gap with assumptions; they may simply lean a little more on measured values and, where appropriate, discuss whether any additional testing makes sense. That is a decision for you and the team together, and it is better made with the gap named than hidden.

Who a comprehensive check-up is usually for, and who is asked to wait

Comprehensive check-ups are built for people who feel well. Their purpose is to screen: to look for common, slow-moving conditions such as raised blood pressure, abnormal cholesterol and early diabetes in adults who have no symptoms pointing to them. The NHS Health Check illustrates the typical target group, offering the program to people aged 40 to 74 who have not already been diagnosed with cardiovascular disease, diabetes or kidney disease, according to the NHS. Other systems use different age bands and menus, but the shape is similar: the healthy middle years, when risk is accumulating quietly and still changeable.

Some people are asked to wait, or are redirected, and it is worth understanding why. If you are acutely unwell, with fever, new chest pain, breathlessness or a recent infection, a screening slot is the wrong place. Those symptoms need assessment on their own terms, and an infection can distort results such as white cell counts and inflammatory markers for weeks. Clinics will usually suggest rebooking once you have recovered.

People who already have a diagnosed long-term condition are often better served by condition-specific monitoring than by a general check-up, because the tests and targets differ. Someone recently tested elsewhere may be asked not to repeat the same panel. Pregnancy changes normal ranges for many tests and the screening menu itself, so the team will usually recommend the antenatal pathway instead.

Screening in people who feel well also carries trade-offs that a good program will explain. Every test has a chance of a false positive, meaning an abnormal result in someone without the disease, which leads to anxiety and further tests. Imaging can turn up incidental findings of uncertain meaning. None of this argues against check-ups; it argues for the right tests, for the right person, chosen with a clinician who knows your history.

Scans and imaging at a check-up: what preparation they need

Not every check-up includes imaging, and when it does, the preparation depends entirely on which part of the body is being examined. Mainstream guidelines reserve imaging for a clinical reason, such as a symptom, a risk factor or a screening program with evidence behind it, rather than adding scans for completeness. If your program lists a scan, it is fair to ask what question it is meant to answer.

An ECG needs almost nothing from you beyond dry skin. Skip body lotion on the chest that morning, and be ready to lie still for a few minutes while the recording is taken. It is painless and takes less time than filling in the consent form.

A chest X-ray requires removing metal from the area: necklaces, underwired garments, zips. Tell the radiographer if there is any chance you are pregnant. Radiographers ask this routinely; it is not a judgment.

Ultrasound is where instructions vary most. Ultrasound uses sound waves, not radiation, to build a picture of soft tissue. An abdominal scan looking at the liver and gallbladder is commonly done after a period without food, because a meal makes the gallbladder contract and gas in the bowel gets in the way. A pelvic or bladder scan often needs the opposite, a comfortably full bladder, which acts as a window for the sound waves. Your appointment instructions will specify the timing; follow them rather than guessing, and if fasting for a blood test and a full-bladder scan are both booked, remember that water is allowed and, in this case, helpful.

A bone density scan, sometimes called a DEXA, is a low-dose X-ray that measures bone strength. It is quick and needs no fasting, though the team may ask about calcium supplements taken that day.

Whatever the scan, ask who will read it, when the report is expected, and what would happen if it showed something unexpected. Incidental findings are common in imaging of well people, and knowing the plan in advance takes much of the sting out of a follow-up call.

Questions to ask your care team before and during the visit

A check-up is one of the few medical appointments where you have time. Use it. The questions below are not a script; pick the ones that fit your situation and add your own.

• Which tests are planned for me, and what is each one looking for? Are any of them optional for someone with my history?
• Which tests need fasting, and for exactly how long? Can I drink water throughout?
• How should I handle my regular medicines on the morning of the appointment? (This is a question for the prescriber, and the answer belongs to them.)
• Are there screening tests I am due for at my age or given my family history that are not on this list?
• How and when will I receive results, and who will explain them to me?
• What happens if a result is outside the normal range? Would it be repeated, or would I be referred?
• How do today’s results compare with my previous ones? Is there a trend I should know about?
• Of everything measured today, which one or two numbers matter most for my long-term health?
• If a scan is planned, what question is it answering, and what would you do with an unexpected finding?
• Is there anything I am doing, or not doing, that you would change first?

Notice that several of these are about what happens afterward. People often prepare carefully for the blood draw and not at all for the results letter, which is where the real decisions live. Asking about the follow-up process before you leave means you are not left refreshing a portal wondering whether silence means good news.

Write the answers down, or ask whether you can record the conversation. Memory under mild stress is unreliable, and a check-up, however routine, carries a little stress for almost everyone.

What the days and weeks after a check-up usually look like

The needle site is the first thing you will notice. A small bruise where blood was drawn is common and typically fades over several days; keeping the plaster on for a few hours and avoiding heavy lifting with that arm for the rest of the day helps. Mild light-headedness after a fasting draw settles once you have eaten, which is why the snack in your bag matters.

Then comes the wait. According to the NHS, some blood test results are available within hours, while others take several days or, for specialized tests, a few weeks. Imaging reports have their own timeline, because a radiologist needs to review the pictures. Your team should have told you how results will arrive; if not, a quick call to ask is reasonable.

When the results come, you will see numbers beside a reference range. A reference range is the span of values found in most healthy people, and a value just outside it is not automatically a disease. Laboratory results vary with time of day, hydration, recent illness and sheer biological noise, which is why clinicians look at patterns and repeat borderline tests rather than reacting to a single figure. Try not to compare your values with those of a friend or a forum; ranges differ between laboratories and between methods.

Many programs offer a follow-up conversation, in person or by phone, to walk through the findings. This is where the questions you did not think to ask on the day belong. If a result leads to a referral or a repeat test, ask what the timeframe is and what, if anything, you should do in the meantime.

For most people, the weeks after a check-up look ordinary: a letter, perhaps a nudge about one or two habits, and a date for the next round. That ordinariness is the point.

What people often get wrong when they prepare for a health check up

‘Fasting means no water.’ The opposite is true. Water is allowed and makes the blood draw easier, as MedlinePlus confirms. Arriving dehydrated is the more common mistake.

‘If eight hours is good, sixteen is better.’ Fasting is a window, not a competition. Going far beyond the requested hours can shift results and increases the chance of feeling faint.

‘One high blood pressure reading means I have hypertension.’ A single clinic reading is a starting point, not a diagnosis. Repeat measurements and often home monitoring come first.

‘I will skip my tablets so the doctor sees my real numbers.’ Your real numbers are the ones you live with, on your usual treatment. Withholding prescribed medicine without the prescriber’s agreement distorts the picture and can be unsafe.

‘A week of clean living will improve my results.’ Cholesterol and HbA1c reflect months, not days. A short burst of virtue mostly hides your baseline from the people trying to help you.

‘Every blood test needs fasting.’ Many common tests, including full blood counts, thyroid tests and HbA1c, are not affected by a meal. Check which ones on your list actually require it.

‘More scans mean a more thorough check-up.’ Imaging without a clinical question mostly finds incidental shadows that lead to more tests and more worry. Thoroughness comes from the right tests, not the most tests.

‘A normal check-up means I am fine for years.’ A check-up is a snapshot. New symptoms between check-ups still need attention, and screening intervals exist precisely because risk changes.

‘The results letter is the end of it.’ The letter is the beginning of the useful conversation. The questions you bring to the follow-up matter as much as the ones you brought to the draw.

When to call your doctor

Most check-ups pass without incident, but a few situations deserve a prompt call rather than a shrug.

After the blood draw, contact your care team if the puncture site becomes increasingly red, hot or swollen, if there is pus, if you develop a fever, or if you notice numbness, tingling or persistent pain in the arm or hand. A small bruise is expected; a spreading, painful one is not.

If you have diabetes and, during the fasting window, feel shaky, sweaty, confused or unusually irritable, treat it as a possible low blood sugar: eat or drink something, then let the team know so the appointment can be rearranged safely. Do not push through to protect the test.

If you feel faint during or after the draw, tell staff immediately. Fainting is common and manageable, but it should not be handled alone in a car park.

When results arrive, call if the letter flags anything as urgent, if you do not understand what a result means, or if you have been told a repeat test or referral is needed and nothing has happened within the timeframe you were given. Chasing is not a nuisance; it is part of the process.

Some symptoms should never wait for a check-up or a results letter. Call emergency services for chest pain or pressure, sudden breathlessness, sudden weakness or numbness on one side of the body, facial drooping, slurred speech, a severe sudden headache, coughing up or passing blood, or a sudden change in consciousness. A screening appointment is designed for people who feel well; these are signs that need care now.

Every decision about what your results mean, and what should follow from them, rests with the clinicians who know your history. Preparation gives them a clearer picture. It does not replace their judgment, and it should not have to.

Frequently asked questions

How long to fast before blood work for a check-up?

Most fasting blood tests require 8–12 hours without food, with water permitted, according to MedlinePlus. Cholesterol panels have traditionally used a 9–12 hour window, though some can now be done without fasting. Your clinic’s instruction is the one that counts; if it is missing or unclear, call before the appointment rather than guessing on the morning.

Can I drink water while fasting for a blood test?

Yes. Plain water is allowed during a laboratory fast and is actively encouraged, because staying hydrated makes veins easier to find and reduces the chance of feeling faint after the draw. Everything else, including black coffee, tea, juice, gum and mints, is normally excluded because it can influence results or stimulate digestion.

Does black coffee break a fast before blood tests?

For laboratory purposes, yes. Fasting instructions from MedlinePlus permit only water, and coffee, even without milk or sugar, contains compounds that can affect some results. It also raises blood pressure shortly before a reading. Save the coffee for after the draw, and pack a snack so you can break the fast comfortably.

Should I stop my medication before a health check-up?

No, not on your own. Most prescribed medicines are taken as normal with water during a fast, and stopping them distorts the very readings the check-up is meant to capture. Some treatments, particularly those that lower blood glucose, need a specific plan for a fasting morning. That plan comes from the prescribing clinician, so ask well before the day.

What should annual physical exam preparation include?

Confirm which tests are booked and whether any need fasting, book an early slot so fasting overlaps sleep, and gather a written list of medicines and supplements, allergies, previous results and family history. Write your questions down, wear loose clothing with sleeves that roll up, avoid caffeine and exercise for 30 minutes before a blood pressure reading, and bring a snack for afterward.

Why is my blood pressure higher at the doctor's office than at home?

Clinic readings often run higher because of the unfamiliar setting, rushing to arrive, caffeine, a full bladder or talking during the measurement. This is sometimes called the white-coat effect. Clinicians expect it, which is why one elevated reading is not a diagnosis and why they often repeat measurements or ask for a home blood pressure log before reaching any conclusion.

What happens if I accidentally eat before a fasting blood test?

Tell the phlebotomist exactly what you ate and when. Depending on the tests booked, they may draw the non-fasting tests today and rebook the fasting ones, or run everything and flag the results as non-fasting so the interpreting clinician knows. Hiding it is the real problem, because a meal can produce values that look abnormal and trigger unnecessary repeat testing.

Do I need to fast for a comprehensive metabolic panel or a full blood count?

A complete blood count does not require fasting. A basic or comprehensive metabolic panel, which includes glucose, kidney function and electrolytes, is often done fasting because of the glucose component, according to MedlinePlus. If your check-up combines both, you will usually be asked to fast for the whole draw for simplicity. Follow the instruction you are given.

How long does it take to get check-up results back?

It varies by test. The NHS notes that some blood results are available within hours, while others take several days and specialized tests can take a few weeks. Imaging needs a radiologist’s report, which adds time. Ask your team how and when results will arrive and who will explain them, so that a quiet inbox does not turn into needless worry.

Is a full-body scan a good idea as part of a check-up?

Mainstream guidelines reserve imaging for a clinical question, such as a symptom or a specific screening program with evidence behind it, rather than scanning well people from head to toe. Broad imaging tends to find incidental shadows that lead to more tests and anxiety without clear benefit. If a scan is proposed, ask what question it answers and what would follow an unexpected finding.

References

• MedlinePlus: Fasting for a Blood Test
• NHS: NHS Health Check
• NHS: Blood tests

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.