Carnitine, Total and Free
A compound that shuttles long-chain fatty acids into mitochondria to be burned for energy.
Central to fat oxidation and mitochondrial energy production. Deficiency is uncommon but meaningful in vegetarians, dialysis patients, and certain metabolic conditions — and it's relevant to the TMAO conversation.
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🩸 Test your Carnitine, Total and Free
Order directly through Marek Diagnostics — no doctor's visit needed, drawn at any Quest location in the US. Code CAMERON applies 10% off automatically.
Order this test — 10% off → Browse all 102 markers →What Carnitine, Total and Free is usually tested alongside
On its own, one marker is a data point. These panels include Carnitine, Total and Free plus the markers that make it interpretable — each names every test, why it is on the list, and loads the whole set into your cart in one click at 10% off.
includes this + 7 more markers — Weight that won't shift, energy crashes after meals, expanding waistline, family history of diabetes, or a fasting glucose that's crept into the 90s.
includes this + 8 more markers — Anyone over 30, anyone with a family history of early heart disease, or anyone who's been told their cholesterol is 'fine' and wants to know what that actually means.
includes this + 9 more markers · built for women — Irregular or absent periods, acne, unwanted hair growth, scalp thinning, difficulty losing weight, or you've been told 'probably PCOS' without a workup.
What moves your Carnitine, Total and Free
2 compounds and 2 supplements in the Vault have a documented effect on this marker, or are a reason to have measured it first:
Browse all 237 compounds & 350 supplements →
Would you feel it? Symptoms Carnitine, Total and Free helps explain
People rarely search for a marker — they search for how they feel. These are the complaints where this marker is worth checking, and whether it is a first-line test or a follow-up once the obvious causes are ruled out.
Why your Carnitine, Total and Free might be wrong
Most abnormal results are interference, not disease. These are the things that measurably move this specific marker — check them before you change anything. Each one says whether the number is wrong and should be repeated, badly timed and should be redrawn, or real with a cause worth explaining.
Valproate and pivalate-containing antibiotics both deplete carnitine substantially over months of use, by conjugating it and forcing renal loss.
Note any long-term use — it is the likeliest explanation for a low result.
Alters carnitine handling markedly in both directions depending on stage.
Interpret alongside kidney function.
Rises after eating, so a non-fasted draw measures your breakfast rather than your baseline.
Draw fasted, 10–12 hours, water only.
What Carnitine, Total and Free means in combination
A single marker tells you a little. Combinations tell you the story — these are the named patterns this marker takes part in, and what each one points at.
A well-run plant-based diet is fine, but four nutrients are genuinely harder to get and this combination shows a diet that has not been supplemented deliberately.
B12 is non-negotiable and non-optional — deficiency causes irreversible neurological damage. Add iron with vitamin C away from tea and coffee, plus vitamin D, zinc and an algal omega-3. Retest in 3 months.
What to test next
Markers rarely answer alone. These are the ones that put Carnitine, Total and Free in context — each with its own full breakdown.
Frequently asked questions
Total 30–89 µmol/L, free 22–66 µmol/L Ranges vary by laboratory and assay — always compare to the range printed on your own report.
Optimal ranges, root causes and the full correction protocol are available inside Coach Cam's Peptide Academy.
See the full breakdown inside the Academy.
See the full breakdown inside the Academy.
You can order Carnitine, Total and Free directly through Marek Diagnostics without a doctor's visit — drawn at any Quest Diagnostics location in the US. Code CAMERON applies 10% off automatically.