Post-Viral Fatigue & Long COVID
Consider Mitochondria & Gut Health
COVID may feel like it was a long time ago, but millions of people are still struggling with lingering symptoms we call Long COVID.
And it is not just COVID. Epstein-Barr virus, the virus that causes mono, can leave people with crushing fatigue and brain fog for months or even years. Up to 40 percent of people report these lingering symptoms after an Epstein-Barr infection.
So why does this happen?
The Virus Hides in the Gut
Research has found viral RNA and proteins hiding in gut tissue for months or even years after infection. This happens even when the virus is no longer detectable in the lungs.
In simple terms, the virus leaves the lungs but it persists in the gut. This keeps your immune system on high alert, creating chronic inflammation that drags on and on.
Your Cellular Batteries Take a Hit
There is a second factor that is just as important. Your mitochondria. These are the tiny powerhouses inside your cells. They produce something called ATP, which is your body’s energy currency.
Post-viral infections often damage these mitochondria directly. When your ATP drops, you do not just feel a little tired. You experience profound weakness, fatigue, and trouble thinking clearly. These are the hallmark symptoms of Long COVID.
And there are probably other viruses that cause these same lingering symptoms that we just have not identified yet.
How We Help Patients Recover
When we work with Long COVID patients, we focus on two things.
First, we provide mitochondrial support. Think of it as recharging those cellular batteries so your body can make energy again.
Second, and most importantly, we focus on gut health. COVID disrupts the microbiome. It reduces the good bacteria and allows harmful ones to take over. We work to rebuild a normal, balanced gut ecosystem. Healing the gut is central to reducing inflammation and getting your energy back.
If you are still exhausted long after the infection is gone, the answer is not always in the lungs. We have to look deeper. We have to look at the gut and the mitochondria.
Recovery is possible. It starts with understanding what is really going on inside your body.
Authored by Gerard Guillory, MD
Gerard Guillory, MD, is a board-certified internist who practiced for nearly four decades with a focus on functional, root-cause medicine. He is the author of three books on irritable bowel syndrome and the founder of It’s My Health, where he and his team put current health news in context and help members understand the underlying causes of chronic symptoms.
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