3 Years on Carnivore, Sky-High LDL, and a CAC Score of 0

June 18, 2026

Here's a scenario that plays out in the carnivore community more often than people realize: you've been eating this way for years, you feel amazing, your energy is stable, your skin cleared up, your joints stopped hurting, your blood sugar is perfect. Then you get a lipid panel and your LDL is sitting at 300-plus. Your doctor freaks out. Your family freaks out. Maybe you freak out a little too.

This is exactly what happened to a 41-year-old man who shared his story on r/carnivore recently. Three years in, the benefits were "significant across the board." But there was one complication: his lipid panel.

He fits the LMHR - Lean Mass Hyper-Responder - phenotype perfectly. High HDL, low triglycerides, very high LDL, and low inflammation markers. His total cholesterol is well above 300. And he's asking the question that everyone in this position eventually asks: is this actually dangerous?

What the LMHR Phenotype Actually Looks Like

The LMHR pattern is pretty specific. You're typically lean and active. Your HDL is high - we're talking 80-100 mg/dL. Your triglycerides are low - under 70, sometimes under 50. Your fasting insulin and CRP are normal or excellent. And your LDL is high - sometimes shockingly high. 200, 300, even 400 mg/dL.

If you just look at the LDL number in isolation, it looks like a heart attack waiting to happen. Every doctor you show it to will tell you to go on a statin immediately. But the rest of the picture tells a different story. High HDL is strongly protective. Low triglycerides signal good metabolic health. Low inflammation means your arteries aren't under attack.

The question is whether high LDL in the context of otherwise perfect markers is actually dangerous. And the answer is a lot more complicated than most doctors will admit.

Why a CAC Score of 0 Is Reassuring But Not Enough

Our Reddit user got a coronary artery calcium (CAC) scan. The result was zero. No calcified plaque at all. For a 41-year-old man with three years of sky-high LDL, that's genuinely good news. Calcium in your arteries is a sign of advanced plaque that's been there long enough to calcify. A zero score means you don't have that.

But here's the thing he pointed out that a lot of people miss: a CAC score of zero tells you nothing about soft plaque. Soft plaque is the stuff that hasn't calcified yet. It's more vulnerable to rupture, and it's invisible on a standard CAC scan. You need a CCTA - coronary CT angiography - to see soft plaque, and that's a much more expensive test with contrast dye involved.

He's getting a carotid Doppler next. Not as definitive as a CCTA, but it gives some directional information about what's actually happening in his arteries beyond the calcium score.

That's the right approach. The CAC score is a useful first step, but it's not the end of the conversation - especially for someone in their 40s or younger where calcification can take years to develop even if soft plaque is forming.

The LMHR Dilemma That Nobody Has Fully Solved

The research on lean mass hyper-responders is still young. Dr. David Diamond and other researchers have published papers suggesting the LMHR pattern is benign - that the high LDL in this context is a metabolic adaptation to burning fat for fuel rather than a pathological process. Your liver produces more LDL because you're using more fat for energy, and your body becomes more efficient at clearing triglycerides. The LDL particles themselves tend to be the large, fluffy kind that don't easily lodge in artery walls.

But "suggesting" isn't "proven." And when your doctor sees an LDL of 300, they're not going to care about particle size or LMHR research. They're going to see a number that their entire medical training says is dangerous and reach for a prescription pad.

The worst thing you can do is ignore the numbers entirely. The second worst thing is panic and quit the diet that's improved every other aspect of your health. The middle path - what this Redditor is doing - is to keep investigating. Get the advanced tests. Track the trends. Don't assume the standard lipid panel tells the whole story.

What to Do If You're in This Position

If your carnivore diet has given you sky-high LDL but everything else looks great, here's a reasonable approach:

Get advanced lipid testing. A standard panel can't distinguish between large fluffy LDL and small dense LDL. An NMR or ion-mobility test will tell you your particle size and count, which are much better predictors of risk than total LDL alone.

Measure inflammation directly. High-sensitivity CRP, fibrinogen, and homocysteine give you a better picture of your actual cardiovascular risk than LDL ever will. If these are low, your arteries are not under attack.

Consider a CAC scan. It's cheap, quick, and gives you a baseline. But understand its limits. A zero score is good news but not a full clearance.

Don't let the perfect be the enemy of the good. If carnivore has fixed your blood sugar, eliminated joint pain, cleared your skin, normalized your weight, and given you stable energy - that's a massive win. Don't throw that away because one number looks scary without context.

This is exactly why having a good electrolyte supplement and a high-quality salt on hand matters during checkups too - being well-hydrated and well-salted before a blood draw gives you a more accurate picture. And a reliable meat thermometer ensures you're consistently cooking high-quality meat to perfection, which keeps you actually enjoying the diet long-term rather than white-knuckling through it.

The LMHR question is one of the most important unresolved topics in the carnivore space. People are living this experiment right now, getting real data on their own bodies. The answers will come from people like this Redditor who are willing to share their numbers and their stories, not from one-size-fits-all guidelines written by committees who have never tried this way of eating.

For now, if your numbers look like his, stay curious but don't panic. Get the right tests. Work with a doctor who understands metabolic health. And trust the fact that you feel better than you ever have.

Original discussion: r/carnivore - 3 years carnivore, LMHR phenotype

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