Your Keto Bloodwork Came Back “Bad.” Now What?

Your Keto Bloodwork Came Back "Bad." Now What?

You've been feeling great. More energy, clearer head, pants fitting better. Then you get your bloodwork back and your LDL is through the roof. Your doctor calls. Wants to "discuss your results." And suddenly you're questioning everything.

I've been through this. Twice, actually. And I've walked dozens of people through this exact panic. So let me tell you what I wish someone had told me the first time I saw my total cholesterol hit 280.

First: What Actually Changes on Keto

When you switch to a high-fat, low-carb diet, your blood lipid panel is going to shift. That's not a bug. It's your body adapting to a completely different fuel source. Here's what typically happens:

• LDL cholesterol goes up. Sometimes a lot. This is the number that sends doctors reaching for the prescription pad.
• HDL cholesterol goes up. This is the "good" one, and keto tends to raise it significantly.
• Triglycerides drop. Often dramatically. This is one of the clearest markers of metabolic improvement.
• Fasting glucose stabilizes. Less spiking, less crashing.

So your total cholesterol number might look scary. But that single number is doing a terrible job of telling your actual story.

The Number That Actually Matters (and Nobody Orders)

Here's what frustrates me. Standard lipid panels give you total cholesterol, LDL, HDL, and triglycerides. That's it. And most doctors look at the LDL number, compare it to a threshold, and stop thinking.

But LDL isn't one thing. It's a category. You've got large, buoyant LDL particles and small, dense LDL particles. The small dense ones are the ones associated with cardiovascular risk. The large buoyant ones? Research shows they're largely benign.

Keto tends to shift your LDL profile toward those larger particles. So your LDL number goes up, but the composition improves. A standard panel can't see this. You need an advanced lipid panel, sometimes called an NMR LipoProfile or a CardioIQ test, to get the actual particle breakdown.

In my experience, this is the single most important test you can request. And most doctors will order it if you ask.

The Ratio Your Doctor Probably Isn't Calculating

Here's a quick one you can do yourself right now. Pull up your last lab results and divide your triglycerides by your HDL.

Triglycerides ÷ HDL = your ratio.

Under 2.0 is considered ideal. Under 1.0 is excellent. Research consistently shows this ratio is a stronger predictor of cardiovascular risk than LDL alone. And on keto? Most people see this ratio improve significantly because triglycerides tank and HDL climbs.

I've seen people with an LDL of 210 and a trig/HDL ratio of 0.8. Their doctor wanted them on statins. Their actual risk profile was better than most people eating "heart healthy" whole grains.

Inflammation Markers Tell the Real Story

If you want the full picture, ask for these alongside your lipid panel:

• hs-CRP (high-sensitivity C-reactive protein): Measures systemic inflammation. This is a direct indicator of cardiovascular risk. You want it under 1.0 mg/L.
• Fasting insulin: Not fasting glucose. Insulin. Your glucose can look normal for years while your insulin is working overtime. Fasting insulin under 5 µIU/mL is what I like to see.
• HbA1c: Your 3-month blood sugar average. Under 5.4% is solid.

If your hs-CRP is low, your fasting insulin is low, your triglycerides are low, and your HDL is high, you are metabolically healthy. Period. Regardless of what your total LDL says.

When You Should Actually Be Concerned

I'm not going to tell you cholesterol doesn't matter. That's not honest and it's not helpful. There are situations where elevated LDL on keto deserves real medical attention:

• Your LDL particle count (LDL-P) is very high on an advanced panel. Not just LDL-C. The particle count.
• Your hs-CRP is elevated alongside high LDL. High cholesterol plus high inflammation is a different conversation.
• You have a family history of early heart disease. Familial hypercholesterolemia is real, and keto can amplify it.
• Your triglycerides went UP on keto. That's unusual and worth investigating.
• You feel worse. I know this sounds basic. But your body gives you signals. Don't ignore them because a forum told you everything is fine.

Actually, let me say that again. If multiple markers are moving in the wrong direction and you don't feel good, please go talk to your doctor. No diet philosophy is worth more than your health.

How to Talk to Your Doctor Without It Going Sideways

Most GPs learned maybe a few hours of nutrition in medical school. They're not dumb. They're just working from a framework that treats LDL as the primary villain. So when your LDL comes back at 240, their training says: prescribe a statin.

Here's what I tell people to do. Don't go in defensive. Don't go in with a stack of PubMed printouts. Instead:

• Ask for the advanced lipid panel. Say: "I'd like to see my particle size and count before we make any decisions. Can we order an NMR LipoProfile?"
• Ask for hs-CRP and fasting insulin. Frame it as wanting the complete picture.
• Acknowledge their concern. "I hear you that the LDL number is high. I want to make sure we're looking at the right metrics to understand my actual risk."
• Give it a timeline. "Can we retest in 3 months with the expanded panel before starting any medication?"

Most reasonable doctors will agree to that. You're not refusing care. You're asking for better data. And honestly? If the advanced panel comes back and your particle count is genuinely concerning, then you and your doctor can make a decision based on real information. That's a win either way.

What I Think (And This Is Just My Opinion)

I think the standard lipid panel is an outdated tool being used to make important decisions. I think triglyceride-to-HDL ratio tells you more than LDL alone ever will. I think most people who panic about their keto bloodwork are healthier than they've ever been, and the numbers just need context.

But I also think blanket statements like "cholesterol is a scam" are dangerous. Some people genuinely need medical intervention. The answer isn't ignoring your doctor. It's getting better tests and having smarter conversations.

Your body is giving you data. Learn to read all of it. Not just the one number that fits a narrative.

If you want to see where you actually stand, you can run your macros in the calculator for free. Some people also pick up the optional Doctor's Report, which spells out the labs worth asking for and a few talking points, so your next appointment turns into a real conversation instead of a rushed one.

Not a Doctor. I've researched this deeply and I've worked with a lot of people on keto, but I'm not your doctor. I can't see your full medical history, your family risk factors, or your complete bloodwork. Everything here is educational based on research and what I've seen work. If you're on medications, have diagnosed conditions, or your doctor is genuinely concerned, please work with them. Get the advanced tests. Make decisions together. Your situation might be different from what I've described here.

If you're tracking your health markers closely, understanding what happens to blood sugar in the first 30 days gives you more context. And if your doctor's reaction has you second-guessing keto entirely, Chloe's piece on why people quit and how to stick with it is worth a read.