A person may feel perfectly healthy while inflammatory processes are gradually affecting the cardiovascular system.

This matters because arteries are not simply passive tubes carrying blood. Their inner walls contain living cells that constantly communicate with the immune system, respond to changes in blood flow, and help regulate the movement of substances between the bloodstream and surrounding tissues.

When these cells become irritated or damaged, inflammatory signaling pathways may become activated.

Immune cells, including monocytes, can enter the arterial wall and develop into macrophages. These cells help remove unwanted material, but when they absorb excessive amounts of modified cholesterol, they can become foam cells.

Over time, foam cells and other components contribute to the formation of atherosclerotic plaques.

These plaques can narrow arteries, interfere with normal blood circulation, and sometimes become unstable. If a plaque ruptures, a blood clot may form and block blood flow, potentially causing a heart attack or stroke.

This is why reducing unnecessary chronic inflammation is an important goal in cardiovascular prevention.

How fasting may influence inflammation

Intermittent fasting changes several metabolic signals that may influence inflammatory activity.

One potential pathway involves insulin.

Persistently elevated insulin levels and insulin resistance are often associated with metabolic dysfunction, obesity, and inflammatory signaling. When people adopt a fasting schedule that improves insulin sensitivity or reduces excess body fat, some inflammatory markers may also decline.

Another possible pathway involves oxidative stress.

Oxidative stress occurs when the production of reactive oxygen species exceeds the body's ability to neutralize them. Excessive oxidative stress can damage proteins, lipids, and cellular structures, contributing to inflammatory responses.

Fasting-related metabolic changes may influence antioxidant defenses and cellular stress-response pathways.

Researchers have also examined how fasting affects immune-cell behavior, including the activity of monocytes and other inflammatory cells.

Some studies suggest that intermittent fasting and related dietary interventions can alter the number or activity of circulating immune cells. Nevertheless, the results depend on the fasting schedule, participants' health conditions, and the specific inflammatory marker being measured.

It is therefore more accurate to say that fasting may help regulate certain inflammatory processes rather than claiming that it automatically switches off inflammation throughout the body.

Why this matters after 60

Aging is associated with a phenomenon sometimes called inflammaging: a gradual increase in low-grade systemic inflammatory activity.

This does not mean every older adult has the same degree of inflammation. Genetics, physical activity, body composition, diet, sleep, infections, chronic illnesses, and medications all influence inflammatory status.

Nevertheless, inflammation becomes increasingly relevant because older adults are more likely to have accumulated cardiovascular risk factors.

Someone who has spent 30 years with poorly controlled blood pressure or elevated blood glucose may have experienced prolonged exposure to conditions that contribute to arterial injury.

An eating pattern that improves metabolic health could therefore offer additional value.

For adults over 60, the potential benefit is not necessarily a dramatic reduction in inflammation after a few fasting sessions. It may be the gradual improvement of several interconnected risk factors over time.

A healthy dietary pattern, regular physical activity, adequate sleep, and appropriate medical treatment remain essential.

Intermittent fasting may complement these habits, but it should not replace proven treatment for inflammatory or cardiovascular conditions.

Effect 2: It May Support Better Endothelial Function

One of the least discussed but most important components of cardiovascular health is the endothelium.

The endothelium is a thin layer of specialized cells that lines the interior of blood vessels throughout the body. Although extremely delicate, it performs several functions essential to normal circulation.

Healthy endothelial cells help regulate:

• Blood vessel relaxation and contraction.

• The movement of nutrients and other substances between blood and surrounding tissues.

• Blood clotting and the prevention of unnecessary clot formation.

• Communication between blood vessels and immune cells.

• The balance between inflammatory and anti-inflammatory signals.

One of the endothelium's most important products is nitric oxide.

Nitric oxide is a signaling molecule that helps blood vessels relax. When endothelial cells produce sufficient nitric oxide, arteries can respond appropriately to changes in blood flow.

This process is called vasodilation.

When nitric oxide availability decreases, blood vessels may become less responsive. The endothelium may also become more vulnerable to oxidative stress and inflammatory activity.

Over time, endothelial dysfunction is associated with hypertension, diabetes, atherosclerosis, and other cardiovascular conditions.

Why endothelial health becomes increasingly important with age

As people grow older, the ability of blood vessels to respond to changes in circulation may decline.

Several factors contribute to this process:

• Reduced nitric oxide availability.

• Increased oxidative stress.

• Chronic inflammation.

• Higher blood pressure.

• Insulin resistance.

• Changes in the structure and elasticity of arterial walls.

These changes can make arteries less flexible and reduce their ability to accommodate fluctuations in blood flow.

The consequences may extend beyond the heart. Poor vascular function can affect the circulation supplying the brain, kidneys, muscles, and other organs.

How intermittent fasting may help

Intermittent fasting may support endothelial function indirectly by improving some of the conditions that damage the endothelium.

For example, better blood sugar regulation can reduce exposure to repeated glucose spikes. Improved insulin sensitivity may also help restore healthier metabolic signaling.

If fasting leads to a reduction in excess abdominal fat, this may decrease inflammatory signals associated with visceral adipose tissue.

Some research has also examined whether fasting-related changes in oxidative stress and nitric oxide signaling can influence vascular responsiveness.

One commonly used measurement is flow-mediated dilation, or FMD.

During this test, researchers use ultrasound to measure how much an artery expands after blood flow increases. The result provides information about endothelial function.

An improvement in FMD can indicate that blood vessels are responding more effectively to changes in circulation.

However, FMD is a physiological measurement, not a direct measurement of heart attack risk. Improvements in this marker are encouraging, but they do not automatically prove that a particular fasting protocol prevents cardiovascular events.

What adults over 60 should understand

For older adults, maintaining endothelial function is part of preserving the health of the entire circulatory system.

Healthy blood vessels help the heart pump blood efficiently and ensure that organs receive sufficient oxygen and nutrients.

The potential benefit of intermittent fasting is therefore not limited to the cardiovascular system in a narrow sense.

Nevertheless, there is currently insufficient evidence to conclude that intermittent fasting consistently improves endothelial function by a specific percentage in all adults aged 60 and older.

The outcome depends on individual health, the type of fasting schedule, baseline metabolic status, and other lifestyle factors.

A practical way to support endothelial health is to combine a nutritious eating pattern with regular movement.

Walking, cycling, swimming, and other forms of moderate aerobic activity can improve vascular responsiveness. Strength training also helps maintain muscle mass and metabolic health.

For many older adults, these established activities may provide more predictable benefits than extending fasting periods.

Effect 3: It May Improve Insulin Sensitivity and Reduce Arterial Glycation

Another important connection between intermittent fasting and cardiovascular health involves insulin resistance.

Insulin resistance develops when the body's cells become less responsive to insulin. The pancreas may compensate by producing more of this hormone, allowing blood glucose to remain within a relatively normal range for some time.

Eventually, however, this compensation may become insufficient. Blood glucose can rise, increasing the risk of prediabetes and type 2 diabetes.