Mark Hyman, M.D. Profile picture
15X NY Times bestseller. Tackling the root causes of chronic illness and our broken food & health system. Co-Founder & CMO @function
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Aug 7 5 tweets 2 min read
My friend @DavidAKesslerMD just submitted a groundbreaking petition to the FDA that could transform American health.

The same doctor who took down Big Tobacco in the 90s is now taking on Big Food - and this could change everything... 👇 Here's what makes this petition so significant:

- Kessler argues these ingredients are the "primary causal determinant" of metabolic harm
- FDA hasn't properly reviewed their safety in 40 years - during which America's obesity crisis emerged
- There's no expert consensus that refined carbs in ultraprocessed foods are safe
- This could trigger a complete remaking of our food supply
Jul 26 6 tweets 2 min read
VICTORY: The HHS, FDA, and USDA are taking action on addressing the health risks of ultra-processed foods! 🎉

This is a major breakthrough.

For years, I’ve been called “radical” for saying that ultra-processed foods are fueling our chronic disease epidemic. Now, for the first time ever, the federal government is creating a uniform definition of what ultra-processed food actually is.

This changes everything.

Here's why this announcement is massive and what it actually means for your health: 🧵 Right now, there's NO official government definition of what makes food "ultra-processed." This has allowed food companies to run wild with confusing labels and marketing tricks.

They slap "all natural" on products loaded with chemicals. They use terms like "made with real fruit" when there's barely any fruit inside. They've blurred the lines so much that parents can't tell what's actually healthy anymore.

The devastating result:
- 70% of packaged foods in America are ultra-processed
Kids get 60% of their calories from these "foods"
- Skyrocketing rates of heart disease, diabetes, cancer & obesity, all linked to UPFs
Jul 17 8 tweets 2 min read
BREAKING: The CDC just released new data that should alarm every parent in America: 1 in 3 teenagers now has prediabetes. 🧵 This is a national crisis.

The CDC just released new data from its NHANES study, a nationally representative survey using lab testing to track health in the U.S.

What they found is staggering:
- 1 in 3 teens aged 12–17 has prediabetes
- Nearly 1 in 4 has either prediabetes or full-blown type 2 diabetes
Jul 10 11 tweets 2 min read
BREAKING: Texas just passed a first-of-its-kind law requiring doctors to learn about nutrition.

This could be the shift we need to move medicine from reactive to preventive care. Let me explain why this is so important and long overdue:

I received almost no nutrition training in medical school. And sadly, that’s still the case for most doctors today.

Less than 25% of medical schools meet the minimum recommended hours for nutrition education. And the training that does exist focuses on outdated topics like scurvy, not chronic disease prevention.
Jun 10 9 tweets 2 min read
There’s a hidden chemical in many of your favorite crispy, crunchy, golden-brown foods, and it’s not on the label... 🧵 It’s called acrylamide.

Acrylamide is not added to food; it's created when certain foods are cooked at high temperatures (above 248°F / 120°C).

The WHO calls it a probable human carcinogen. The EPA classifies it as likely to cause cancer in humans.

It’s also a neurotoxin, hormone disruptor, and may harm reproductive organs.
Apr 30 6 tweets 2 min read
This Harvard MD/PhD lowered his LDL cholesterol more with Oreo cookies than with a statin.

Yes, you read that right...

But before you panic (or celebrate), here's the science behind one of the most fascinating self-experiments I’ve ever seen… 🧵 Nick Norwitz was on a strict ketogenic diet.

His LDL? Over 500.

So he ran an experiment:
Keep everything the same… except add 100g of carbs a day from one source—Oreos.

In 16 days, his LDL dropped 71%.
The statin only dropped it 32.5%.

⬇️
Apr 9 8 tweets 2 min read
Protein is one of the most powerful regulators of your nervous system.

What you eat in the morning directly influences your brain chemistry, your cravings, and your ability to regulate your nervous system throughout the day. 👇 Protein sends your cells a biochemical message: you're safe, you're stable, you're nourished.

Cravings and emotional eating are symptoms of a dysregulated brain-body system—often rooted in disrupted dopamine signaling, unstable blood sugar, and stress overload.
Mar 31 7 tweets 2 min read
Bayer was just ordered to pay $2.1 billion to a man who developed cancer from Roundup exposure.

That’s one of the largest legal verdicts of its kind—and there are still over 60,000 more cases pending… Yet instead of removing dangerous products from store shelves, Bayer is quietly reformulating Roundup with even more harmful ingredients…
Mar 21 10 tweets 2 min read
Butter increases your risk of death?


That’s what the headlines said.
Here’s what they left out. 👇jamanetwork.com/journals/jamai… A new study from JAMA followed over 221,000 adults for up to 33 years and concluded:

– More butter = higher mortality
– Replacing butter with “healthy fats” (like canola and soybean oil) = lower mortality

But the real story is far more complicated—and flawed.
Mar 19 14 tweets 3 min read
American farmers send $80 BILLION overseas every year—to foreign corporations controlling our food system.

Meanwhile, farmers are drowning in debt, rural economies are collapsing, and chronic disease is at an all-time high.

This is a national crisis. 🧵👇 There are 200 MILLION acres of farmland dedicated to industrial grain production in the U.S.

Farmers spend $400 per acre on chemical inputs—fertilizers, pesticides, herbicides—driving total costs to $80 BILLION per year.

And guess what? That money doesn’t stay in the U.S...
Feb 26 9 tweets 4 min read
I sat down with medical anthropologist and shamanic healer Alberto Villoldo to uncover what indigenous cultures know about brain health and longevity that we’ve forgotten.

Here are 5 shocking truths about your brain you need to know: 🧵👇 1. Every 20 years, you grow an entirely new brain:

For decades, scientists believed brain cells couldn’t regenerate.

Wrong.

Every 20 years, you grow an entirely new brain—but only if you activate BDNF, your brain’s repair factor.

The strongest BDNF boosters:
- Exercise (especially sprinting & resistance training)
- Meditation (lowers stress, which kills BDNF)
- DHA from omega-3s (indigenous cultures used DHA as currency)
Feb 19 6 tweets 2 min read
For my entire career, I have worked toward this moment—a moment when the devastating twin crises of chronic disease and mental health in America are finally placed under a national magnifying glass. I never thought I’d see the day when this level of attention was directed toward the epidemic of obesity, diabetes, heart disease, autoimmune disorders, and the mental health struggles affecting millions of Americans, including our children.

whitehouse.gov/presidential-a… The statistics are staggering. Nearly six in ten Americans now suffer from at least one chronic disease, and our life expectancy lags behind other developed nations. One in five U.S. adults lives with a mental illness, while rates of childhood obesity, metabolic dysfunction, and neurodevelopmental disorders are climbing at an alarming pace.
Feb 18 6 tweets 2 min read
A recent study found that teabags release approximately 11.6 billion microplastics in a single cup of tea…🧵👇 Researchers found that a single plastic teabag releases approximately 11.6 billion microplastics and 3.1 billion nanoplastics into a single cup of tea.

These particles are thousands of times higher than what has been previously reported in food and water.

Plastics in your tea aren’t just an environmental issue—they could also be affecting your health.
Feb 13 6 tweets 2 min read
Oxford’s Word of the Year for 2024 was BRAIN ROT.

Excessive screen time, mindless scrolling, and digital addiction is reshaping your brain. Here’s what you need to know. 🧵👇 The term brain rot describes the mental fog, shortened attention span, and cognitive decline linked to overconsuming low-quality online content.

Usage of the term increased 230% between 2023 and 2024.

Social media addiction has been linked to poor executive function, memory, and decision-making in young adults.

So, what’s really happening to our brains?
Feb 11 8 tweets 2 min read
For decades, we've been told that Type 2 diabetes is a chronic, progressive disease. But what if that's not true?

What if you could reverse it naturally—without drugs? 🧵👇 93% of Americans have some form of metabolic dysfunction.

And yet, the current "solution" is to give more drugs. More insulin. More dependence.

But insulin resistance—the root cause of Type 2 diabetes—is not a drug deficiency.

It’s a food problem.
Feb 10 10 tweets 3 min read
Seed oils: toxic or heart-healthy?

The debate is explosive, but the truth is clear—here’s what the science really says. 🧵👇 We’re consuming more seed oils than ever before—often without realizing it.

The average American now consumes over three tablespoons of soybean oil per day.

Between 1909 and 1999, linoleic acid intake (primarily from seed oils like soybean and corn) increased by more than 1,000 percent.

Research shows that this shift in fat consumption is a key driver of chronic inflammation, metabolic dysfunction, and disease
Feb 6 8 tweets 2 min read
New Research links GLP-1 drugs to higher thyroid cancer risk.

Ozempic and Wegovy are under scrutiny again—this time for a potential link to increased thyroid cancer cases. 🧵👇 A new study found that GLP-1 receptor agonists—the class of drugs behind Ozempic and similar weight-loss injections—are associated with a higher incidence of thyroid cancer.

Researchers analyzed over 70,000 cases and saw a significant rise in medullary thyroid carcinoma (MTC) after people started these drugs.
Feb 3 7 tweets 2 min read
A recent study found that chronic alcohol use doesn’t just damage your liver—it rewires your brain, making it harder to think clearly, break bad habits, and adapt to change. 🧵 Alcohol Use Disorder affects 400 million people worldwide, increasing the risk of cancer, heart disease, and stroke.

But research now shows it also disrupts cognitive flexibility—your brain’s ability to switch between tasks, process new information, and adjust to change.
Jan 29 6 tweets 2 min read
What if everything you thought you knew about cholesterol and heart disease was wrong?

Dr. Aseem Malhotra—a top cardiologist—used to prescribe statins without a second thought. Then he uncovered something shocking. 🧵👇 For years, we were told that lowering LDL cholesterol is the key to heart health. Doctors handed out statins like candy.

But Dr. Malhotra started questioning this after losing his own father—a physician—to a sudden heart attack. His cholesterol was “perfect.”
Jan 23 5 tweets 1 min read
A new report reveals toxic heavy metals like lead and cadmium in nearly half of protein powders tested.

These toxins can harm your brain, heart, and kidneys—and they’re hiding in products marketed as “healthy.” 🧵 The worst offenders include:

-Plant-based protein powders: 3x more lead than whey.
-Organic powders: 3x more lead, 2x more cadmium than non-organic.
-Chocolate flavors: 4x more lead than vanilla.
Jan 17 6 tweets 1 min read
New research reveals that females sleep less, wake up more often, and experience less restorative sleep than males. 🧵 This isn’t just about feeling tired.

Poor sleep quality can impact your mood, immune function, hormones, and risk of chronic diseases like diabetes and Alzheimer’s.

Yet for decades, research has overlooked the unique biology of females when studying sleep and testing treatments.