Heart markers
Blood Tests for Statins UK: What Is Checked, and When
Reviewed by a qualified clinician · analysed at UKAS-accredited UK labs (ISO 15189)
Last reviewed September 20267 min read
Every Helvy guide is written by our health editors, then checked by a qualified clinician before it goes live and re-checked as the science moves. We name clinical roles, not individuals, until each reviewer has agreed to be credited publicly. This is wellness guidance to help you understand your own data, not a diagnosis.
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NICE asks for a full lipid profile and a liver enzyme called ALT before you start a statin, both again at 2 to 3 months, and ALT once more at 12 months. After that liver tests stop unless there is a reason. The target is a drop of more than 40% in non-HDL cholesterol.
Not sure which markers you need? Build your test →Nobody hands you the schedule. You get a prescription, a vague mention of a blood test at some point, and a year later you are not sure whether the thing is working.
The schedule exists and it is written down. Here is what NICE asks for before a statin, at 3 months, at 12 months and every year after, plus what each number is being read against.
1. Which blood tests come before a statin?
A baseline set, so there is something to compare against later. NICE lists it plainly:
“Before starting statins perform baseline blood tests and clinical assessment. Include all of the following in the assessment: … full lipid profile, diabetes status, renal function, transaminase level (alanine aminotransferase or aspartate aminotransferase), thyroid-stimulating hormone level in people with symptoms of underactive or overactive thyroid.”
NICE guideline NG238, recommendation 1.5.5
Four of those five are blood tests. In plain words: your cholesterol set, a blood sugar marker, your kidney markers and a liver enzyme. Thyroid is added only if you have symptoms of a thyroid problem.
| NICE calls it | On your report it is |
|---|---|
| Full lipid profile | Total cholesterol, HDL, LDL, non-HDL and triglycerides |
| Diabetes status | HbA1c, your average blood sugar over about 3 months |
| Renal function | Creatinine, urea and eGFR, the kidney set |
| Transaminase | ALT, a liver enzyme. Some labs run AST instead |
The baseline matters more than people expect. Without it there is nothing to measure the 40% target against. Our guide to the cholesterol blood test covers what each lipid number does, and cholesterol levels by age puts a starting figure in context.
2. What is tested at 2 to 3 months?
Two things, and NICE is specific about both. Recommendation 1.11.1 says to “measure liver transaminase and full lipid profile at 2 to 3 months after starting or changing lipid-lowering treatment”.
This is the appointment that answers whether it is working. For people taking a statin to prevent a first heart problem, NICE sets the goal as “a greater than 40% reduction in non-HDL cholesterol”. Not a target number. A percentage fall from your own starting point.
That is why non-HDL is the number to watch, and why your baseline reading is worth keeping. Non-HDL cholesterol explains what it counts, which is every cholesterol particle that can build up in an artery wall. LDL cholesterol is the bigger slice of it.
| When | What is measured |
|---|---|
| Before starting | Lipids, HbA1c, kidney markers, ALT |
| 2 to 3 months | Lipids and ALT again |
| 12 months | ALT, then no more unless there is a reason |
| Every year | A medication review, with a full lipid profile |
3. What happens at 12 months and after?
The liver check stops. NICE says to “measure liver transaminase at 12 months, but not again unless clinically indicated”. Three liver tests in total: one before, one at 3 months, one at a year.
The cholesterol side carries on. NICE asks for an annual medication review, and a full lipid profile with it. For people who have already had a heart attack or stroke that yearly profile is offered. For everyone else it is considered.
So a settled statin year looks quiet on paper. One review, one lipid panel, no liver test. If that gap feels long, it is the commonest reason people check their own numbers in between.
4. What does a raised ALT mean on a statin?
Less than most people fear. ALT is alanine aminotransferase, an enzyme that leaks out of liver cells. A mild rise is common and NICE does not treat it as a stop sign.
Its wording is blunt: “do not routinely exclude from statin treatment people who have liver transaminase levels that are raised but are less than 3 times the upper limit of normal”. Three times the top of your lab's range is the line, not one point over it.
Worth knowing, because ALT ranges differ between UK labs, so the same result can be flagged at one and printed clean at another. High ALT levels covers that spread, and the ALT blood test guide explains what moves the number. A full liver function test reads it beside ALP and albumin.
Blood sugar gets the same treatment. Statins can nudge HbA1c up a little, and NICE says not to stop a statin because of it. If you want to watch that number anyway, the HbA1c blood test guide covers what it measures.
5. Do muscle aches need a blood test?
Only if you have them. The marker is creatine kinase, usually written CK, an enzyme that spills from muscle when it is damaged.
NICE asks for CK when someone on a statin reports unexplained muscle pain, tenderness or weakness. If the result comes back under 5 times the upper limit of normal, its advice is to reassure the person and look for another cause. And it says plainly: do not measure CK in people on a statin who have no symptoms.
That last line is the useful one. A routine CK on a well person mostly finds hard training. High creatine kinase levels covers how far a heavy gym week can push it, and statins, muscle aches and CoQ10 looks at what the evidence says about the supplement people reach for.
6. Which blood test carries these markers?
Start with the honest part. Statin monitoring belongs to whoever prescribed it. A home test does not replace the baseline, the 3 month check or the annual review, and it is a wellness test rather than a medical one.
What it can do is show you the same markers between appointments. Two Helvy panels cover them. Thyroid & Vital Organs is the closest match to the NICE pair, because it carries ALT and your kidney markers alongside the full lipid set, non-HDL included.
Advanced Heart Health goes the other way. It drops the liver enzymes and adds ApoB, Lp(a), hs-CRP and HbA1c to the lipid set. Both are home finger-prick kits, processed by a UKAS-accredited UK lab. If you are unsure which fits, the build-my-test tool takes about a minute. Neither panel measures creatine kinase, so a CK question is one for your GP.
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Frequently asked questions
What blood tests are needed before starting a statin?
NICE names a full lipid profile, diabetes status, kidney function and a liver enzyme called ALT. Thyroid is added only if you have symptoms of a thyroid problem.
How often are blood tests done on statins?
Before starting, again at 2 to 3 months, and ALT once more at 12 months. After that, NICE asks for an annual medication review with a full lipid profile.
Do you need a liver test every year on a statin?
No. NICE stops routine liver testing after the 12 month check unless there is a clinical reason to repeat it.
What is the target cholesterol on a statin?
For preventing a first heart problem, NICE aims for a fall of more than 40% in non-HDL cholesterol from your own baseline. That is a percentage, not a fixed figure.
Can you take a statin with a raised ALT?
Often yes. NICE says not to routinely exclude people whose liver enzymes are raised but under 3 times the top of the range. Your prescriber makes that call.
Do statin muscle aches show up in blood?
Sometimes. Creatine kinase is measured when muscle symptoms are unexplained. Under 5 times the upper limit, NICE suggests looking for another cause.
Do you need to fast for a statin blood test?
Usually not. A full lipid profile is measured non-fasting in UK practice. Triglycerides read most accurately after an overnight fast, so follow whatever your own kit or clinic asks for.
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