Cardiovascular calculator

AIP — Atherogenic Index of Plasma

A log-transformed triglyceride:HDL ratio that correlates with LDL particle size and cardiovascular risk.

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How this is worked out. AIP = log₁₀(triglycerides / HDL), both in molar terms in the original — the mg/dL ratio is used here because the log of a ratio shifts by a constant, and the thresholds below are the ones published for that form. Dobiášová & Frohlich, Clin Biochem 2001.
<0.11 low risk · 0.11–0.21 intermediate · >0.21 high. Reflects small dense LDL particles, which are more atherogenic.

The bands on this page

ResultWhat it is called here
under 0.11Low risk
0.11 to 0.21Intermediate risk
over 0.21High risk

What goes in, and where each number comes from

Every input is a real test. Follow one to see its normal range, its optimal range and what moves it — the calculation is only as good as the numbers you feed it.

What it costs to actually get these numbers

The 1 test on their own$8.10
The cheapest panel that covers them — The Basics — Start Here (4 markers)$32.40
Order the tests, not the panel. This calculation needs 1 result, and buying it individually is $24.30 cheaper than the smallest panel that happens to contain it. The panel is worth it only if you want the other 3 markers on it too.
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Prices are Marek Diagnostics with the 10% code already applied, and they are what was filed when this page was built — check the cart. Ordering through these links pays a commission at no cost to you.

What could have moved the measurement, not the marker

A wrong number and a real change look identical on a report. These are the reasons a result here can be an artifact of how the blood was drawn or run, and they are worth ruling out before anything else.

timingFasting vs non-fasting

Triglycerides rise substantially after eating; total and HDL cholesterol barely move. Because LDL is usually calculated from triglycerides, a non-fasted draw distorts the LDL too — and the error is worst in exactly the people with high triglycerides.

What to do: Fast 10–12 hours if LDL matters. Guidelines increasingly accept non-fasting lipids, but be consistent between tests.

drugTestosterone and anabolic steroids

Lower HDL substantially, and oral 17-alpha-alkylated compounds do so dramatically.

What to do: Expect it on TRT; note it rather than being alarmed by it in isolation.

stateRecent illness, injury or surgery

Cholesterol falls during acute illness and can stay low for weeks — a lipid panel after a hospital admission understates your true level.

What to do: Wait six weeks after any significant illness or surgery.

stateAcute weight loss or a very low-carbohydrate diet

Active fat loss mobilizes lipids and can transiently raise LDL. Some people show a striking LDL rise on ketogenic diets.

What to do: Measure at weight stability, not mid-cut.

This tool does not diagnose anything. It puts a number next to a published interval and shows the arithmetic that got there. It cannot see your symptoms, your medications, your history or the assay your lab ran. A result outside the outer bounds belongs in front of a clinician, not in a supplement search.

Where to go with this

Read one of these results on its ownType a value, pick your units and sex, and see where it sits and what could have moved it.The Basics — Start Here4 markers, $32.40 with the code — what it settles and what it does not.Every marker on this site103 markers, each with the normal range, the optimal range and what moves it.

The other cardiovascular calculations

Triglyceride : HDL RatioA free surrogate for insulin resistance and small dense LDL, hiding inside any standard lipid panel.Non-HDL CholesterolTotal cholesterol minus HDL — capturing every atherogenic particle in one number. A close cousin of ApoB, free on any lipid panel.ApoB : ApoA-1 RatioAtherogenic particles divided by protective particles — one of the strongest lipid predictors of heart attack in global data.