Is this the Holy Grail of Metabolic Health?
Medicine may have just hit a breakthrough—not just in weight loss, but in body composition. A human trial has revealed an intervention that sheds fat while preserving, or even building, muscle.
Modern medicine may have just hit a breakthrough—not just in weight loss, but in body composition.
A controlled human trial, revealed to the academic community just last week, promises an intervention that sheds fat while preserving, or even building, muscle.
And no, it’s not a GLP drug. It’s not related to Ozempic or Retatrutide or any of that species of medicine.
But let’s begin not with pharmaceuticals. Let’s begin with nature.
What Can We Learn from Genetic Freaks?
There’s a gene that codes for a hormone called “myostatin.”
Myostatin is negative regulator of muscle growth.
Occasionally, animals—and even some humans—are born with myostatin deficiency.
The result is what’s known as the “double-muscle” phenotype.
And in the era of AI, let me be clear: these is not AI.
They’re real. Real freaky! But real!
This double muscle phenomenon has been observed in certain cattle, such as the Belgian Blue (pictured)—in dogs, called ‘bully whippets’—and in mice, called Arnold Schwarzensqueakers.
Okay, I made up the Arnold Schwarzensqueakers. But the others are real!
There are also a few humans who appear to have been blessed with this genetic gift.
Myostatin itself is myokine, meaning a hormone released by muscle cells and acting back on muscles inhibit their growth.
This leads to an obvious hypothesis: If we could create a molecule—say, a human antibody—that neutralizes myostatin (or its receptors), could we recapitulate this effect?
Could we develop a therapy that preserves or builds while blasting fat mass.
It turns out, the answer may be… Yes. We may be approaching a new era for the human species… maybe. Let’s take a peek.
The rest of this letter is reserved for StayCurious Premium members.
In the full piece, we break down:
The science behind a new drug that just completed phase 2 trials, showing 100% fat loss with even some muscle-building potential.
We discuss the trade-offs, the side effects
And the potential effects on longevity and healthspan
We’ll discuss how it may work in combination with standard GLP-1 therapies.
From there, I’ll also point you toward additional learning—including:
Practical strategies for reducing visceral fat
How to avoid pharmaceuticals that may contribute to muscle loss
A concept I call the “binge snowball.”
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