The Hidden Key to Heart Health: Why Your “Normal” Cholesterol Might Not Be Enough

By Anna Gunderson, PA-C, FMCP-M

Cardiovascular disease remains the leading cause of death worldwide, accounting for nearly one out of every three deaths in the United States. Even more concerning, heart failure and sudden cardiac death are increasing among adults under 45. The good news? Up to 90% of cardiovascular disease is considered preventable through lifestyle, nutrition, and early intervention.

Most people focus on cholesterol numbers, blood pressure, and weight. While these factors matter, they don't tell the whole story. To truly understand cardiovascular health, we need to look deeper—at the health of the endothelium, the delicate lining inside our blood vessels.

The Overlooked Driver of Heart Disease

The endothelium plays a critical role in circulation. When healthy, it produces nitric oxide (NO), a powerful signaling molecule that helps blood vessels relax, improves circulation, reduces inflammation, and prevents abnormal clotting.

When nitric oxide production declines, endothelial dysfunction develops—often years before a heart attack, stroke, or diagnosis of cardiovascular disease.

Unfortunately, natural nitric oxide production decreases by roughly 10–12% per decade as we age. Supporting nitric oxide production may be one of the most important strategies for protecting long-term cardiovascular health.

Why Standard Cholesterol Testing Can Miss Risk

One of the most surprising findings in cardiology is that approximately half of all heart attacks occur in people with "normal" LDL cholesterol levels.

Traditional lipid panels measure LDL cholesterol (LDL-C), which reflects the amount of cholesterol being transported in the bloodstream. However, LDL-C doesn't tell us how many LDL particles are actually circulating.

Think of LDL cholesterol as the cargo and LDL particles as the trucks carrying that cargo. Traffic congestion is determined by the number of trucks on the road—not necessarily how much cargo each truck contains.

Advanced markers such as Apolipoprotein B (ApoB) and LDL Particle Number often provide a more accurate assessment of cardiovascular risk and may uncover hidden concerns long before they appear on a standard cholesterol panel.

Supporting Your Body's Nitric Oxide Production

The body relies on two major pathways to produce nitric oxide.

1. The Dietary Nitrate Pathway

Certain vegetables contain natural nitrates that are converted into nitric oxide through beneficial bacteria in the mouth and normal stomach acid production.

Focus on nitrate-rich foods such as:

• Arugula
• Spinach
• Beets
• Swiss chard
• Rhubarb

This pathway can be disrupted by habits many people consider harmless. Frequent use of antiseptic mouthwash, fluoride-containing products, and long-term acid-suppressing medications may reduce nitric oxide production by interfering with this natural process.

2. The Enzymatic Nitric Oxide Pathway

A specialized enzyme called endothelial nitric oxide synthase (eNOS) produces nitric oxide from amino acids such as L-arginine and L-citrulline.

This pathway depends on adequate nutritional support, including:

• Vitamin D3
• Riboflavin (B2)
• Niacin (B3)
• Folate
• Antioxidants

Simple lifestyle practices can also stimulate nitric oxide release, including deep nasal breathing, humming, regular physical activity, and healthy exposure to sunlight.

A Functional Approach to Cardiovascular Repair

When signs of cardiovascular dysfunction are already present—such as high blood pressure, insulin resistance, fatigue, or elevated inflammatory markers—a more targeted strategy may be helpful.

Follow a Mediterranean-Style Eating Pattern

A modified Mediterranean diet remains one of the most evidence-supported nutritional approaches for cardiovascular health.

Emphasize:

• Vegetables and fruits
• Olive oil and healthy fats
• High-quality protein
• Nuts and seeds
• Minimally processed foods

Prioritize Omega-3 Fatty Acids

Omega-3 fats help reduce inflammation, improve lipid balance, and support healthy blood vessel function.

Many adults benefit from 1–3 grams of combined EPA and DHA daily, depending on individual needs and clinical guidance.

Consider Targeted Nutritional Support

Several nutrients have shown promise in supporting cardiovascular health:

Garlic

• Helps reduce LDL oxidation
• Supports healthy blood pressure
• May slow plaque progression

Tocotrienols

• A specialized form of vitamin E
• Supports vascular health and healthy inflammatory balance

Specialized Pro-Resolving Mediators (SPMs)

• Help the body actively resolve inflammation
• Support healthy plaque remodeling and vascular repair

Looking Beyond the Numbers

Heart health is about far more than achieving a "normal" cholesterol level. The health of your blood vessels, the function of your endothelium, and your body's ability to produce nitric oxide all play essential roles in cardiovascular wellness.

By combining foundational lifestyle habits with advanced lipid testing and targeted nutritional strategies, we can identify risks earlier and support the body's natural ability to maintain healthy circulation.

The choices you make today have a profound impact on your future health. As we often remind our patients:

Do something today that your future self will thank you for.