LONDON — The body has a daily war going on inside it. Free radicals — unstable molecules — rip through cells, damaging DNA, proteins, and membranes. Antioxidants push back.
When the balance breaks, oxidative stress sets in. It is not a rare medical event.
It is a direct outcome of routine choices. Molly Knudsen, a registered dietitian nutritionist with a master’s degree from Texas Christian University in nutrition interventions, communication, and behavior, has catalogued six habits that drive this imbalance. She wrote about them for MindBodyGreen.
The list reads like a summary of modern life. Processed foods and refined sugars lead the charge.
They trigger a metabolic cascade that floods the system with free radicals. Convenience foods carry a hidden cellular cost. The body’s antioxidant defenses go into overdrive trying to keep up.
They lose. Chronic sleep deprivation is another culprit. Sleep is when the body runs its nightly repair cycles.
Without it, oxidative damage piles up. This is not just about feeling tired.
It is about a fundamental breakdown in maintenance protocols. The body cannot fix what it never gets time to touch. Excessive alcohol consumption makes the list.
The metabolism of alcohol produces acetaldehyde and other reactive oxygen species. These directly increase oxidative stress.
Moderate intake may be fine. Regular intake above that level appears to consistently drive inflammation. A sedentary lifestyle rounds out the habits Knudsen flagged.
Moderate exercise reduces oxidative stress. Sitting for long stretches does the opposite. The body needs movement to keep its cellular machinery running clean.
The timing of this matters. Oxidative stress is linked to aging, chronic disease, and inflammation.
It is not a niche concern. It is a background condition for millions of people who never think about free radicals until something goes wrong. Knudsen’s list gives them a place to start.
This is not new science. The role of free radicals in cellular damage has been understood for decades.
What Knudsen does is connect that science to daily life. She names the habits. She makes the invisible visible.
The body’s antioxidant defenses are not infinite. They can be overwhelmed. The question is whether people will change the habits that tip the scales.
The answer is not clear. But the list is out there now.
Six habits. Six places to start.
