Inflammation: The Other Risk Factor Worth Knowing About

When your heart attack changes what "healthy" means

Right after my heart attack, I made a deal with myself. I was going to do everything right. I had to. I mean, if you don’t get your sh*t together after a heart attack, when do you? So, statins? Check. Eat better? Work in progress, but definitely no more red meat or fried fish. Grilled all the way. Exercise? Mostly check. Get enough sleep? Eh check-ish. Manage stress? Ehhhhhhh 

And mostly, I held up my end of the deal. Getting my cholesterol down seemed like the big one right?

But what nobody explains to you (at least not to me) is that managing cardiovascular health after a cardiac event is only partly about cholesterol. There’s a psychological impact which will be a post for another day. And then, there’s a whole other layer under that. I found out about it the way I find out about most things regarding my health now: Googling at midnight when I should have been asleep.

What I didn’t understand

Many of you reading may know this now, as it definitely is being talked about a lot more lately, but you can get your LDL completely under control on statins and still be at elevated risk for another event.

What? Yeah. But it doesn’t mean exactly what you think it means.

A large observational study published in the European Heart Journal looked at statin-treated adults with cardiovascular disease who underwent percutaneous coronary intervention (Fancy peak for something like a stent which is considered minimally invasive intervention). What they found was that people with elevated inflammatory markers were at higher risk of another cardiac event, even when their cholesterol was well controlled (!!) What surprised me most was that people with elevated inflammatory markers often had worse outcomes than people whose primary issue was LDL cholesterol alone. As in more heart attacks. Or death. Yikes.

The researchers who’ve been studying this have given it a name: residual inflammatory risk. The idea is that inflammation plays a meaningful role in atherosclerosis (artery hardening), separate from cholesterol, and that plenty of people have both well-managed LDL and persistent low-grade inflammation running in the background. Statins, to their credit, do reduce some inflammatory markers. But not always enough.

And that certainly got my attention. Because inflammation isn’t something you can feel easily because it’s not like pain or shortness of breath. It just…exists, …waiting.

What Is Low-Grade Inflammation, Actually?

Okay, let’s back up and discuss this without getting too science-y. Because “inflammation” is one of those words that’s everywhere now—in wellness culture, in supplement ads, in random articles about blueberries and turmeric—and I’m not convinced most people actually know what it means.

Inflammation gets a bad rap, but your body actually needs it. Cut your finger, catch a cold, twist your ankle—inflammation is your immune system showing up to deal with it. That’s the good kind. You want that. The problem is when it doesn’t turn off.

Some people have a low level of immune activity running constantly in the background. No injury or no infection. Just a quiet, persistent hum. You can’t feel it. There’s no obvious symptom. Like if your car just never really turned off. Not ideal. Nobody fully agrees on all the reasons why, but researchers increasingly think that this chronic, low-grade version plays a real role in the buildup of plaque in arteries—separate from, and on top of, the cholesterol piece. And here’s where it gets interesting for people like me, people managing cardiovascular health past 40.

The Nutrient Connection

Several nutrients that are really easy to run low on after 40 are also the same ones your body uses to manage oxidative stress and help keep inflammatory pathways in check.  That last sentence is worth reading again.

So let’s get specific. And I’ll try to keep this in layman’s terms.

Zinc. Your body has built-in defenses against oxidative stress. One of the main ones is an enzyme that neutralizes harmful free radicals before they can damage artery walls and cell membranes—and zinc is what that enzyme needs to function. Without enough of it, that defense system gets sluggish. Zinc also helps modulate certain inflammatory pathways.  The tricky part is that zinc status tends to drift downward with age, and adults on heart-healthy diets that limit red meat can be at higher risk of running low. Which is kind of ironic if you're trying to do everything right.

Magnesium. There’s a blood marker called C-reactive protein (CRP) that doctors use to get a sense of chronic low-grade inflammation. Multiple large analyses have found that people with lower magnesium intake tend to have higher CRP levels. One meta-analysis pooling data from over 30,000 people found that relationship consistently. A follow-up analysis of randomized trials found that some randomized-trial meta-analyses suggest magnesium supplementation can reduce CRP, particularly in people with higher baseline inflammation, though results across studies are mixed. A substantial fraction of adults fall short of recommended magnesium intakes, and that gets more common with age.

Vitamin D3. Most people think of vitamin D as a mood, or a bone or calcium thing. But it also plays a role in how your immune system behaves. There are vitamin D receptors throughout the immune system, and research shows it helps dial down the production of certain compounds that drive inflammation. A large proportion of adults over 40 have low or insufficient vitamin D levels and have no idea.

CoQ10 (ubiquinol). We talked about CoQ10 in the energy post, but it has a second job. Ubiquinol, the form your body actually uses, is a major fat-soluble antioxidant your body produces on its own. It works inside cell membranes and in the blood, protecting fats from being damaged by free radicals. That matters because oxidized fats in artery walls are part of how plaque develops. So when statins reduce your CoQ10 levels, they’re not just affecting your energy. They’re also reducing part of your antioxidant capacity. Those two things are connected.

None of This Has a Magic Fix

Inflammation is very complicated. And my explanations above are as simple as I can make them (and a reminder that I am not giving medical advice). As I mentioned before, no one really agrees on all of the causes—and there are lots of them. And the relationship between nutrient status and inflammatory markers is not always linear, and not every study shows clear dose-response effects. This is a developing area of research and not a settled one. And it’s important to keep that in mind.

What I can say is that the nutrients above have documented roles in the body’s antioxidant and immune-modulating systems, and that many of them are genuinely harder to maintain in adequate levels after 40. And that several of them are specifically affected by the kinds of lifestyle and medication patterns that characterize adults managing cardiovascular health.

So What Would I Actually Do?

I’m not a doctor. I’m someone who had a heart attack at 47, spent a lot of time in research rabbit holes, and tries to apply what I learn to my own situation.

If it were me, I’d also ask my doctor to check my vitamin D, magnesium, and zinc levels the next time I get bloodwork. A lot of doctors don’t run these by default. It’s worth asking specifically.

I’d also ask about hsCRP (high-sensitivity C-reactive protein). It’s one of the standard blood tests doctors use to get a sense of low-grade inflammation. And it’s inexpensive, widely available, and gives you another piece of the puzzle beyond cholesterol.  If you’ve already been through a cardiac event, having that number in front of you can make the conversation about “what else can we do?” a lot more concrete.

Because you only get one heart.
'Til next time,
Stephen.

Sources

Bay, B., et al. (2025). Residual cholesterol and inflammatory risk in statin-treated patients undergoing percutaneous coronary intervention. European Heart Journal, 46(32), 3167–3177. PMID: 40208236

Aday, A. W., & Ridker, P. M. (2019). Targeting residual inflammatory risk: A shifting paradigm for atherosclerotic disease. Frontiers in Cardiovascular Medicine, 6, 16. PMID: 30873416

Lee, S. R. (2018). Critical role of zinc as either an antioxidant or a prooxidant in cellular systems. Oxidative Medicine and Cellular Longevity, 2018, 9156285. PMID: 29682109

Dibaba, D. T., Xun, P., & He, K. (2014). Dietary magnesium intake is inversely associated with serum C-reactive protein levels: Meta-analysis and systematic review. European Journal of Clinical Nutrition, 68(4), 510–516. PMID: 24448782

Simental-Mendía, L. E., et al. (2018). Effect of magnesium supplements on serum C-reactive protein: A systematic review and meta-analysis. Archives of Medical Science, 14(4), 897–903

de la Guía-Galipienso, F., et al. (2021). Vitamin D and cardiovascular health. Clinical Nutrition, 40(5), 2946–2957. PMID: 33397599

Crane, F. L. (2007). Bioenergetic and antioxidant properties of coenzyme Q10: Recent developments. Prostaglandins, Leukotrienes and Essential Fatty Acids, 77(3–4), 177–186. PMID: 17914161