If You're on the GLP-1 Protocol, You Can Counter Its Main Side Effect
Ozempic, Wegovy, Mounjaro work. But there's a cost almost nobody talks about: up to 40% of the weight lost is muscle, not fat. There's a way to prevent it.
GLP-1 agonists — Ozempic, Wegovy, Mounjaro, Zepbound — are probably the most impactful medical intervention of the last decade for weight management. They work. People lose 15-22% of their body weight. Lives change.
But there's a side effect most doctors mention quickly and minimize: a significant portion of that lost weight is muscle mass, not fat.
The real numbers
Studies published in journals like The Lancet and JAMA show that between 25% and 40% of the weight lost on GLP-1 is lean mass — muscle, bone, connective tissue. For someone who loses 20kg, that can mean 5-8kg of muscle. Permanently, if nothing is done.
Why this matters more than you think
Muscle mass isn't just aesthetic. It's the strongest predictor of mortality after age 60. Losing muscle means:
• Slower metabolism (rebound almost guaranteed if you stop the GLP-1)
• Higher fracture risk
• Paradoxically worse insulin resistance long term
• Accelerated loss of physical function
• Weakened immune system
How to counter it
The strategy has two pillars: enough protein (1.6g/kg of body weight) + strength training. But there's a third pillar most people ignore that multiplies the results of the other two: creatine monohydrate.
Creatine is the only non-prescription compound with robust evidence for preserving lean mass during severe caloric deficit. That's exactly what GLP-1 induces. Studies show creatine can reduce muscle loss during caloric restriction by up to 50%.
Before
After 16 weeks
Before
After 90 days on creatine
The creatine we recommend to readers on GLP-1.
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Watch the full protocol →The protocol
If you're on any GLP-1 agonist, this is the minimum viable approach:
1) 1.6g of protein per kilo of body weight, daily.
2) 2-3 strength sessions per week (even light ones).
3) 5g of creatine monohydrate, every day.
Without this, the weight comes back — and comes back as fat, not muscle. With this, GLP-1 does what it's supposed to do: recompose you, not destroy you.
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