By symptom
High cholesterol concern.
Your last lab flagged it. You want a second opinion before you take a statin.
What’s actually going on
How I think about this.
A standard lipid panel reads total cholesterol, LDL-C, HDL-C, and triglycerides. It is a reasonable foundation, and on its own it can leave real questions about cardiovascular risk unanswered in both directions.
The marker that matters is ApoB, the count of every atherogenic particle in your bloodstream. Two people with identical LDL-C can have completely different ApoB and completely different risk. ApoB has outperformed LDL-C in every head-to-head trial for fifteen years, and it is the marker every modern cardiology guideline now uses to drive treatment decisions. Most primary care offices still don’t order it.
Lp(a) is the other missing marker. It is genetic, measured once in your life, and dramatically reshapes risk when elevated. About 20% of the population has high Lp(a) and most have no idea.
The treatment decision is also more nuanced than “statin or no statin.” The right read tells me whether your number is driven by particle count, particle size, dietary intake, insulin resistance, thyroid drift, or inflammation. Each of those calls for a different intervention.
Before anything else
When high cholesterol concern needs medical evaluation.
Everything further down this page is about physiology that can contribute to this symptom. None of it replaces a conventional diagnosis, and some presentations need to be seen rather than measured. Start here.
Get emergency care now
- Chest pain or pressure, breathlessness, or pain radiating to the arm or jaw
- Sudden weakness, numbness, difficulty speaking or vision loss
If any of these apply, this page is not the right next step. Call 911 or go to an emergency department.
See a physician promptly, within days
- LDL cholesterol above 190 mg/dL, which raises the possibility of familial hypercholesterolaemia and is a reason to test first-degree relatives
- Triglycerides above 500 mg/dL, which carries a risk of pancreatitis
- Cholesterol tendon deposits, or a family history of heart attack or stroke before 55 in men or 65 in women
- Known cardiovascular disease with a lipid result not at target
Worth a routine medical evaluation
- A raised cholesterol result with no prior cardiovascular risk assessment
- Never having had apoB or Lp(a) measured
- A lipid panel that has not been rechecked in more than two years
A raised result without the above is exactly the situation where a fuller lipid picture is useful, since the standard panel leaves out the markers that carry most of the information.
This list covers the presentations that most often need conventional assessment. It is not exhaustive, and it does not replace clinical judgement. If something feels wrong and is not on it, that is still a reason to be seen.
Systems that can contribute
Where high cholesterol concern can come from.
Each of these can be part of the picture. None of them is the answer on its own, and finding something here does not establish that it is the reason you feel the way you do.
Lipoprotein biology
Atherogenic risk tracks with the number of particles carrying cholesterol, which apoB measures directly, rather than with total cholesterol alone.
Genetic lipoprotein factors
Lp(a) is largely genetically determined, is not meaningfully moved by diet or exercise, and is worth measuring once in a lifetime.
Insulin and metabolic regulation
Insulin resistance shifts the lipid pattern in characteristic ways, often before glucose changes.
Thyroid physiology
Hypothyroidism raises cholesterol and is worth excluding before attributing a result to diet.
Inflammatory signalling
The inflammatory environment those particles move through is part of what determines risk.
Hepatic and renal handling
Liver and kidney function both affect lipid handling.
The physician’s lens
How I read this in practice.
I read cholesterol as one piece of a cardiovascular system that includes ApoB, Lp(a), particle size, hsCRP, homocysteine, fasting insulin, HbA1c, blood pressure measured properly, and the full thyroid panel. The metabolomic panel catches the upstream nutrient and oxidative-stress patterns. The number is meaningless without that context, and it is also fixable with that context.
The systems behind it
Where this symptom comes from.
Most cases touch more than one. Open each area to read the biology underneath.
Biological pillars
Pillar
Metabolism & Metabolomics.
Urinary organic acids read the upstream patterns of energy production, neurotransmitter balance, detoxification, and recovery.
Read this pillarPillar
Mitochondria & Cellular Energy.
Mitochondria produce most of the energy every other function depends on. Aspects of that function can be assessed, and much of it responds to how you live.
Read this pillarPillar
Exposomics.
The cumulative environmental load a person carries can matter for physiology. Some of it can be measured, and I assess it when your history says it is relevant.
Read this pillar
What measurement settles
What testing can and cannot tell you here.
Testing can help identify
- Measure apoB, Lp(a), particle count and the inflammatory and glycaemic context around them
- Identify thyroid, liver or kidney contributors to a lipid result
- Establish a baseline that later results can be compared against
Testing cannot by itself establish
- Show whether you have plaque. That requires imaging such as a coronary calcium score
- Predict whether you will have a cardiovascular event
- Determine whether lipid-lowering treatment is appropriate for you, which depends on your overall risk
What may help clarify it
The data that explains it.
Cholesterol decisions need ApoB above all else. Then Lp(a), genetic, measured once. Then the advanced lipid subfractions, insulin, inflammation, and thyroid.
What I would measure
Cardiometabolic markers
Reads ApoB, Lp(a), lipid subfractions where useful, fasting insulin, and inflammation. The additional context that often informs treatment decisions.
Explore working with Dr. TaggeWhat I would measure
Cellular and metabolic markers
Adds the upstream oxidative stress, fatty acid balance, and detoxification patterns standard cholesterol panels cannot see.
Explore working with Dr. Tagge
While you wait
Moves worth making before testing.
These are the levers I’d pull while we set up the workup. Most of them produce real signal inside two weeks.
- Get an ApoB and Lp(a) before you make any decision about a statin. Most primary care offices don’t order them. Ask.
- Lift heavy and add zone 2 cardio. Both shift the particle count favorably.
- Cut refined carbohydrates and ultra-processed foods for two weeks. Triglycerides move first; the rest of the panel follows.
- Check your fasting insulin. Insulin resistance is upstream of the lipid pattern most physicians treat as the problem.
If two weeks of the basics doesn’t move the needle, that is the kind of presentation a call with me exists for. Your biology is telling you something the lifestyle layer cannot fix on its own.
Your next step
Measure it, then decide.
There is a coherent measurement pathway here. What a panel does not include is someone reading it against your history, and that reading is where care with me begins.
What to read next
Go one level deeper.
- How I think
- The framework: how a symptom, a result and a history are read together, and why a reference range is not the same as a person’s range.
- The systems
- Metabolism & Metabolomics · Mitochondria & Cellular Energy · Exposomics
Essays on this
Essay
A testosterone of 200 and an ApoB of 120: what a chatbot cannot do with those numbers.
A total testosterone of 200 is not a diagnosis, it is a reason to look for one, and the thing worth ruling out is a pituitary tumor. An ApoB of 120 is not a rounding error. Read together they are often one problem, which is the part an AI asked about each number separately will never tell you.
Read thisEssay
A fasting insulin of 12: what it can, and cannot, tell you.
A fasting insulin of 12 may fall inside a laboratory's reference interval beside a normal glucose. It can add context that glucose and A1c do not give on their own, but it is a proxy, not a diagnosis: there is no universal cut-off, laboratories do not agree, and it is read beside standard testing and repeated before it means anything.
Read thisEssay
An Lp(a) of 150: the lab you measure once, and why it is about your family.
An Lp(a) of 150 nmol/L is elevated, it is mostly inherited, and lifestyle changes usually do not lower it meaningfully. In topline results from the first large outcomes trial of a dedicated Lp(a)-lowering drug, pelacarsen lowered Lp(a) but did not reduce major cardiovascular events. The response is not to chase the number. It is to manage the rest of cardiovascular risk more intensively, and to have your parents, siblings and adult children measured once.
Read this
Browse other symptoms
Something else on your mind?
Fatigue and low energy
When the tank stays low no matter how much you sleep.
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The lights are on but the signal feels weak.
Poor sleep
Either you can’t fall asleep, or you can’t stay asleep.
Perimenopause
The years when the body’s hormonal rhythm changes, before the period stops.
Low libido
Desire that used to be reliable is gone or muted. Both sexes, both directions.
Hair loss
Thinning, shedding, or texture changes that didn’t used to happen.
Erectile dysfunction
ED is the canary. The body is telling you something about vascular and hormonal health.
High cholesterol concern
Your last lab flagged it. You want a second opinion before you take a statin.
High blood pressure concern
The reading came back elevated. You want the full picture before you start a prescription.
Food cravings
Cravings are biology pulling for what it needs, disguised as whatever is easiest to grab.
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