The medication is the easy part. Staying on it — and keeping the weight off — is where most people fail. Proco is the support that gets you there.
Today: the support stacks. Next: the full program.
Half quit within the first year — beaten by the side effects, the muscle loss, and going it alone. The fix isn’t willpower, it’s support. That’s what we do.
What nobody warns you about
Rapid weight loss on very little food hits harder than the number on the scale:
Proco gives you the evidence-dosed essentials to protect against exactly this.
Find your stack
Whichever stage you're at, there's a stack built for it.
Before your first dose
Pre-Start Kit
Set up before your first dose.
What’s insideWhey Protein, Magnesium, Vitamin D3 + free Pre-Start Guide
While you lose
Muscle Defense Stack
Lose fat, not muscle.
What’s insideWhey, Creatine, Omega-3, Magnesium, Vitamin D3
For the side effects
Side-Effect Relief
For the nausea, constipation and crash.
What’s insideFiber, Electrolytes, Magnesium, Ginger + B6
Coming off or maintaining
Keep-It-Off Stack
Hold the muscle. Keep the results.
What’s insideWhey, Creatine, Vitamin D3
Everything, in one
Complete GLP-1 System
The whole solution, in one.
What’s insideAll nine essentials
What we're here for
Up to 40% of the weight you lose on a GLP-1 can be muscle. Proco’s evidence-dosed essentials protect your muscle, heart and metabolism while you lose — every ingredient backed by human trials.
Why Proco
Omega-3 and magnesium — each shown in human trials to support healthy cholesterol, blood sugar and blood pressure while you lose weight.
Rapid weight loss strips lean muscle. Protein and creatine, backed by human trials, help you hold onto the muscle that keeps you strong and your metabolism healthy while you lose.
Where we're going
Losing weight well is about more than what is in the bottle. Alongside the stack you get plain, cited guidance on protecting your muscle, heart and metabolism, the right routine for where you are, and a brand built to support you through the whole journey — not just sell you a tub. Proco is an evidence-first obesity & cardiometabolic health company: supplements are where we start.
GLP-1 Support
GLP-1s and the new generation of weight-loss medications are a powerful tool, and the right supplements help you get the very best from them. Research shows up to 40% of weight lost on these medications can be muscle — so Proco's GLP-1 Support Stack is built to protect it. Four evidence-backed essentials in one: protein and creatine to defend and rebuild lean muscle, omega-3 for heart health, and magnesium to cover the nutrient gaps that come with eating less — all among the most researched compounds in human science. All backed by human trials.
Explore GLP-1 Support →Every formula starts with peer-reviewed human trials — the gold standard. Exact ingredients, exact doses, transparently stated. No proprietary blends, no fillers. Every batch independently tested with a Certificate of Analysis, and every product page cites the studies behind it. You get to see exactly what you're taking, and exactly why.
Thinking about Ozempic, Wegovy or Mounjaro?
The people who keep their muscle (and keep the results) are the ones who set up before the appetite drops: protein dialled in, the right essentials on hand, and a simple plan for the weeks ahead. Walk in ready instead of playing catch-up. Get the free Pre-Start Guide — what to have in place before dose one, the mistakes that cost people their muscle, and the questions to ask your clinician.
Educational only — whether a weight-loss medication is right for you is a decision for you and your clinician.
Common questions
Do I need supplements while on a weight-loss medication?
On Ozempic, Wegovy or Mounjaro you eat far less, so protein and key nutrients fall short and rapid weight loss draws from lean muscle as well as fat — research shows it can be up to 40% of the weight lost. The stack helps you protect muscle, heart and metabolic health while you lose.
What's in the GLP-1 Support Stack?
Whey protein, creatine, omega-3 (EPA+DHA) and magnesium — four evidence-backed essentials, €99 (save €22 vs buying separately).
How do I take it?
A simple daily routine — a protein serving and creatine daily, omega-3 with a meal, and magnesium in the evening.
Are Proco supplements safe?
Every product is dosed to published human-trial ranges, made in GMP/HACCP-certified facilities and batch-tested with a Certificate of Analysis. If you take medication or are pregnant, check with your clinician.
Where do you ship?
We ship across the EU and the US, with free shipping over €65.
I'm only thinking about starting — is this for me?
Yes — the best time to set up is before your first dose. Grab the free Pre-Start Guide above, and have the stack ready for when appetite drops.