Mark Hyman, MD
Co-Founder & Chief Medical Officer of Function Health
August 9, 2025
40-50% of Americans have this condition. Kids are getting liver transplants at 15. Yet most doctors aren’t even testing for it.
I just finished recording a podcast with my colleague Dr. Todd Lapine about one of the most underdiagnosed epidemics in America: fatty liver disease. What we discussed should terrify and empower you in equal measure.
The Shocking Truth About “Non-Alcoholic” Fatty Liver
Here’s what blew my mind: We used to call this “non-alcoholic fatty liver disease,” but that name is misleading. These patients ARE getting alcohol exposure – just not from drinking.
Their gut bacteria are literally brewing alcohol 24/7. High levels of Klebsiella bacteria in the gut ferment the processed foods people eat, creating a constant drip of alcohol directly into the liver. They’re walking around with brain fog because they essentially have low-grade alcohol poisoning all day long.
Think about that: Your gut has become a brewery, and you don’t even know it.
The French Duck Connection
Dr. Lapine made a brilliant analogy that captures exactly what’s happening to our livers. French farmers create foie gras (literally “fatty liver”) by force-feeding ducks corn until their livers become overwhelmed with fat.
Sound familiar? We’re doing the same thing to ourselves with high fructose corn syrup and ultra-processed foods. Except instead of a few days of force-feeding, we’re doing it for decades.
Why Your Doctor Is Missing This
Here’s the frustrating part: We have the diagnostic tools, but most doctors aren’t using them. A simple test called GGT (gamma glutamyl transferase) can catch fatty liver early, but labs stopped including it routinely because “too many people had abnormal results.”
Let that sink in. We stopped testing because the problem was too common.
At the Ultra Wellness Center, we use advanced diagnostics that most doctors never consider:
- Comprehensive insulin resistance testing (not just A1C)
- Gut microbiome analysis
- Advanced liver imaging
- Specialized blood panels that reveal the real story
The Real Culprits (It’s Not What You Think)
It’s not the fat causing fatty liver – it’s the sugar. Specifically:
- High fructose corn syrup (in virtually every processed food)
- Ultra-processed foods (60% of the American diet)
- Refined carbohydrates that spike insulin
- Gut dysbiosis creating internal alcohol production
- Environmental toxins like BPA overwhelming liver function
The Mitochondrial Traffic Jam
Here’s the mechanism that’s destroying your liver: When you overwhelm your system with fructose and processed foods, you create what Dr. Lapine calls a “mitochondrial traffic jam.”
Your cellular powerhouses can’t burn calories fast enough, so excess gets stored as fat – particularly in your liver and around your organs. It’s like having logs that don’t fit in your fireplace, so you start stacking them everywhere.
The Functional Medicine Solution
The beautiful thing? This is completely reversible if caught early. Here’s our approach:
Foundation: Food as Medicine
- Eliminate ultra-processed foods and high fructose corn syrup
- Focus on whole, real foods without labels
- Add liver-supporting foods like ground flaxseeds
Strategic Supplementation
- MCT oil (yes, treating fatty liver with the right fats)
- N-acetylcysteine and glycine to boost glutathione
- Milk thistle and alpha lipoic acid for liver repair
- Berberine (nature’s metformin)
- Tocotrienols (specialized vitamin E)
Address Root Causes
- Heal the gut microbiome
- Reduce toxic exposures
- Optimize sleep and stress management
- Strategic exercise protocols
The Urgency You Can’t Ignore
This isn’t just about adults anymore. We’re seeing 15-year-olds needing liver transplants. Kids who drink soda regularly are developing the same liver damage we used to see only in chronic alcoholics.
If 75% of Americans are overweight and about two-thirds of thin people also have metabolic issues, we’re looking at a health crisis that dwarfs anything we’ve seen before.
What This Means for You
If you’re reading this and thinking “this could be me,” you’re probably right. Most people with fatty liver have no symptoms until it’s advanced.
The conventional medical system will tell you there’s no treatment because there’s no drug for it. That’s exactly why functional medicine exists – to address the root causes when pharmaceuticals fall short.
The Bottom Line
We’re not powerless against this epidemic. Every case of fatty liver I’ve treated has been reversible with the right approach. But it requires thinking differently about medicine – focusing on root causes instead of just managing symptoms.
Your liver is incredibly resilient and wants to heal. We just need to give it the right environment and tools.
The question isn’t whether this affects you – it’s whether you’re going to do something about it before it’s too late.
If you or someone you know is struggling with unexplained fatigue, brain fog, weight gain, or metabolic issues, this could be the missing piece. At the Ultra Wellness Center, we’ve been using functional medicine to reverse chronic diseases for over 20 years. Sometimes the answers aren’t in a prescription pad – they’re in understanding your body as the interconnected system it truly is.
What’s your experience with fatty liver or metabolic health issues? Share your story in the comments – your journey might help someone else take the first step toward healing.