Most of the reasons to test are symptoms. This one is not. You feel fine, nothing is wrong, and you want to know where you stand before anything happens, which is a better position to test from than almost any other.
The awkward part is that a first panel tells you less than you expect. A number in the middle of a range is not reassurance and a number near the edge is not alarm, because ranges are drawn from whole populations and you are one person. What it gives you instead is a fixed point, and everything you measure later is compared against it. That makes this a strange thing to buy: it will be worth more to you in five years than it is today, and every year you put it off is a year of comparison you never get.
So the goal is not to test everything. It is to get one good baseline, broad enough to be worth comparing against, small enough that you will act on it.
Last updated September 7, 2026
Red cells, white cells and platelets. A broad screen that catches anemia and a range of things you would not think to look for, and the standard first line of any workup.
Kidney and liver function, electrolytes, blood sugar and protein in one test. Like the blood count, this is mostly here to be normal, and its value is in what it rules out.
Total, LDL, HDL and triglycerides. Worth having, and worth knowing it is the starting point rather than the answer on heart risk. The ratio of triglycerides to HDL is also a free read on insulin resistance.
What the cholesterol panel leaves out. It counts the particles that lodge in artery walls rather than weighing the cholesterol they carry, and when the two disagree it is the particle count that tracks the risk [1].
The one you do once in your life. It is inherited, it barely moves, and roughly one adult in four or five has a raised level while about one in a thousand has ever been tested [2]. Since 2026 the American guideline says every adult should have it measured once. This is that once.
Average blood sugar over about three months, so a single bad week does not distort it. Between 5.7 and 6.4% is prediabetes [3].
The earliest thing to move when metabolism starts to drift, often years before glucose or HbA1c do [4]. It is almost never in a routine physical, and read with fasting glucose it gives you a HOMA-IR.
Background inflammation, which predicts cardiovascular events independently of cholesterol [5]. Do not test it while you are unwell, because any infection sends it up.
Iron stores, which empty long before a blood count notices [6]. Among the most common findings in anyone who menstruates, and one of the few things on this list that is both common and easy to correct.
One cheap test covering both an underactive and an overactive thyroid, either of which can run for years while being blamed on ordinary life.
The whole-body map. One comprehensive draw covering your heart, metabolism, liver, kidneys, blood, iron, inflammation, and thyroid. It is the place to start, and the one to repeat each year.
This is the panel built for exactly this. It covers everything below except Lp(a) in one draw, including the tests a routine physical skips, and it adds a fuller iron workup alongside the ferritin. Lp(a) sits outside the panel price for a good reason: you only ever order it once. Add it this first time and never again.
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If you have had bloodwork at a checkup, you probably already have part of this. Knowing which part saves you money and tells you what to ask for.
A standard physical usually runs a complete blood count, a metabolic panel and a cholesterol panel. That is three of the ten below, and it is a reasonable foundation. It is built to detect disease that is already present.
What it consistently leaves out is the group that describes risk before anything is wrong: ApoB, Lp(a), fasting insulin and hs-CRP. None of those are exotic or expensive. They are missing because a physical is built to catch disease that has already arrived rather than to describe the years before it. Those should not be different jobs, but they are, and the tests that cover the second one are cheap, ordinary, and orderable without anyone's permission.
If you have had a physical in the last year, dig out the results before ordering anything. You may only need the four additions, which is a much smaller purchase, and you will have a comparison point from the same body a year earlier.
The honest case is not that a first panel will find something. Most of the time it will not, and that is the expected result.
The case is that a single reading is nearly uninformative on its own and becomes informative the moment you have two. A fasting insulin of 9 tells you very little. A fasting insulin of 9 that was 5 four years ago tells you a great deal, and no reference range can give you that, because the comparison you need is against yourself.
This is why the best time to take a baseline is when you feel fine. A panel taken after something has gone wrong has nothing to be compared against, and you end up guessing which of your numbers were always like that.
One test on this list breaks the pattern in a useful way. Lp(a) is genetic and stable across your life, so it is not a baseline to track. It is a single fact about you, answered once and never revisited.
There is no single guideline that fits everyone, and anyone who gives you one number is overselling it. The rough shape: every year or two once you are past forty, every few years if you are younger with nothing flagged, and sooner only if something changed or a previous result asked to be rechecked.
The interval matters less than people think. What matters is that the two readings are comparable, because the whole value of a baseline is the comparison. Use the same lab where you can, fast if you fasted last time, and draw in the morning if you did before. Otherwise you cannot tell a real change from a different lab or a different breakfast.
Twelve weeks is the shortest interval worth bothering with after a deliberate change of diet or training, because HbA1c reflects about three months and will otherwise still be reporting the old you.
This is the part nobody prepares you for, and it matters more when you have ordered the tests yourself, because no one is standing between you and a PDF with something highlighted in red.
A reference range is defined as the middle 95% of results from healthy people. So one result in twenty from a perfectly healthy person falls outside it by construction. That is not a mistake in the test, it is the definition. Across ten independent values the chance of at least one flag is around 40%, and a comprehensive panel reports far more values than it has named tests: a blood count and a metabolic panel contribute over twenty between them.
The consequence is measurable. Looking at abnormal results from ordinary family practice, about 58% were estimated to be false positives [7]. More than half of the red marks meant nothing.
Around four in ten abnormal results do turn out to be real, so a flag is worth following up. It is just not a verdict on its own. How to read your results goes marker by marker.
Ordering your own baseline is for people who feel well. Some things belong in front of a clinician instead.
A first panel is worth less on the day you take it than it will be in five years. That makes it an odd thing to buy, and it is also why waiting only makes it worth less. The one exception is Lp(a), which answers a question permanently the first time you ask it. If you have your numbers, seeing where each one sits against the range the evidence supports is the next thing worth doing.