What I Learned From Provoking Nutrition Twitter on Purpose
I challenged Nutrition Twitter by saying “Calories don’t cause obesity.” The backlash was loud—and revealing. Here’s what I learned about the science, the outrage, and why simple models hold us back.
“Calories Don’t Cause Obesity.”
Those four words sufficient set the internet on fire—as I’ve demonstrated recently on Twitter.
Now, let’s be clear: that’s not all I said.
Yes, it’s a hook—a concise, provocative one. But it points to a deeper issue.
While “calorie” is a valid unit of measurement — defined as the amount of energy required to raise the temperature of one gram of water by one degree Celsius (specifically from 14.5 °C to 15.5 °C at one atmosphere of pressure), measured by combusting food in a bomb calorimeter—this unit is not a biological cause of obesity.
It simply isn’t.
Saying calories cause obesity is like saying a car moves because the speedometer tells you it’s in motion.
It’s circular logic. It confuses measurement with mechanism.
A Pathological Attachment to Calories
But before we go further, let me underline what matters here: this issue is as sociological and psychological as it is biological.
Our society has developed a pathological fixation on calories.
And I use the word “pathological” deliberately.
This letter is not about my ego being bruised by internet trolls threatening to contact Harvard, so they revoke my medical degree. It’s about something much more important: I believe the “Calories In, Calories Out” (CICO) mindset actively retards the research, public discourse, and relearning we desperately need if to make further progress against the obesity epidemic.
CICO, in my view, is a barrier to both scientific and personal progress. It fosters patient-blaming and offers a convenient excuse to stop thinking when the biological realities become too complex for the average mind.
That’s why I care. That’s why I’m willing to stir the pot.
So, let’s dig in.
This letter is exclusive to StayCurious Premium Members—those who want to go deep, think critically, and engage in thoughtful dialogue within a curious community.
Inside, we’ll cover:
The tweets that set Nutrition Twitter ablaze
The emotional backlash and what those reactions actually reveal
Data showing Calories Really Don’t Cause Obesity
Human randomized controlled trial data
Real-world individual variation in fat gain
Clear evidence that calorie intake can be uncoupled from fat accumulation
What to focus on instead of Calories
An autopsy on my social media communication—with an open invitation for your feedback, because this is a learning journey for me too
