Full Report · The weight-loss science Australians over 40 trust · Reviewed against published trial data
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BioStack Labs  ·  Official website: biostackaustralia.com.au  ·  Contact us: health@biostacklabs.com.au
Special Report · For Australians Over 40

Over 40, diets stopped working. The science finally caught up.

In the largest weight-loss trial ever published, the triple-agonist retatrutide averaged 24.2% body-weight loss in 48 weeks - more than Ozempic or Mounjaro, and built for how metabolism changes after 40.

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BioStack Labs Retatrutide 30mg branded research peptide vial.
The landmark result

24.2% - the most weight ever lost in a trial.

In a 48-week trial published in the New England Journal of Medicine (2023), adults on retatrutide lost an average of 24.2% of their body weight - around 26kg. It was the largest reduction ever reported for a weight-loss compound.

24.2%
Retatrutide
48 wks · NEJM 2023
~22.5%
Mounjaro
72 wks · SURMOUNT-1
~15%
Ozempic
68 wks · STEP 1

More weight lost, in less time. Individual results vary; trial figures are not a promise of personal outcome.

Real people · Real footage

The transformations say it best.

Two people, in their own words - when the weight finally moved and stayed off.

Down 19kg · Kept his strength
"I'd given up before I started."
Years of yo-yo dieting - then the weight finally moved and stayed off, without the gaunt, drained look.
Fastest results · Early 30s
"The food noise just... switched off."
A real change in her energy, appetite and confidence - proof it isn't only for the over-40s.
Why nothing worked before

It was never willpower. After 40, the rules changed.

Cut calories and your body fights back - metabolism drops, hunger hormones spike, and the weight creeps home. The old "eat less, move more" advice ignores all of it, which is why you can follow it perfectly and still fail.

After 40 it gets harder: you lose 3-8% of your muscle each decade, so your metabolism slows and the diet that worked at 30 does almost nothing. It just shows up differently for women and men.

For women over 40

Menopause moved the goalposts.

As estrogen falls, fat stops settling on your hips and packs around your middle as visceral fat, while insulin sensitivity drops - so it lands on your belly and won't shift.

For men over 40

Testosterone quietly slipped.

Falling testosterone means less muscle-building signal and more visceral fat around the organs - you train the same, eat the same, and still watch the gut grow.

A triple-agonist is the first tool built for exactly this. It doesn't ask you to out-diet your biology - it changes the signals driving it. Three metabolic switches, not one:

GLP-1

Silences the food noise

The same appetite pathway as Ozempic - hunger drops, cravings fade, the constant thinking about food goes quiet.

GIP

Fixes how you store fat

Improves insulin sensitivity and fat handling - the second lever Mounjaro added, and Ozempic never had.

Glucagon

Burns stored fat

The third switch, unique to retatrutide - it raises energy expenditure and drives your body to burn fat, not just eat less.

Retatrutide vs the rest

Why it leaves Ozempic and Mounjaro behind.

Same class of medicine - a completely different result, because of how many targets it actually hits.

 
RetatrutideBioStack
Mounjaro
Ozempic
Metabolic targets
3
2
1
Fat loss (published trials)
24.2% ★
~22.5%
~15%
Burns stored fat
Yes
No
No
Protects muscle & metabolism
Strongest
Partial
Weakest
Resistance to plateaus
Strongest
Moderate
Prone
The exact source

BioStack Retatrutide 30mg

★★★★★ BioStack Labs · VerifiedTrusted Worldwide · Tested Every Batch
BioStack Labs Retatrutide 30mg research peptide vial.

The triple-agonist, verified.

The exact compound the trial data is built on - from a lab that proves every batch.

Independently HPLC + mass-spec tested - identity and purity confirmed
A Certificate of Analysis for your exact batch - ask before you order
Guided low-to-high titration so you start safely, not blind
No cart to rush through - you talk to a real specialist first
Sent out from the factory within 2 minutes of your confirmed order
Full after-sales service, 24/7 live chat and you will never be ghosted
Talk to a Specialist Now 24/7 live chat · Talk to our health professionals anytime · Research use only

The BioStack service standard

What every reader can expect when they message the lab, from the first hello to long after delivery.

Sent from the factory within 2 minutes

Once your order is confirmed in chat, your peptides are dispatched from the factory within 2 minutes. No waiting days for someone to reply.

Full after-sales service

Reconstitution guidance, storage advice, tracking updates and help with anything that is not right when it arrives. The service does not stop when you pay.

You will never be ghosted

24/7 live chat with real health professionals. The same team answers before your order and after it, any hour, any day.

Proof, and why BioStack

Real results. A source you can verify.

Retatrutide customer
★★★★★

"Nineteen kilos down and I still lift the same. The difference is I'm not thinking about food every waking minute anymore."

- Verified customer
Retatrutide customer
★★★★★

"I'd tried everything. First time the weight came off and stayed off - and the chat with their specialist made it feel safe."

- Verified customer
Independently testedHPLC + mass spec
CoA per batchDated & matched
Ships worldwideDiscreet & tracked
24/7 live chatHealth professionals anytime
Common questions

Before you message us.

How is it different from Ozempic and Mounjaro?
Retatrutide is the only triple-agonist - it activates all three metabolic targets (GLP-1, GIP and glucagon). Ozempic hits one, Mounjaro hits two. That third target is why it drives more fat loss while protecting the muscle and metabolism that keep the weight off.
How do I order?
You order by messaging us on WhatsApp. A specialist sends pricing, your batch's Certificate of Analysis and guided titration advice before you commit - no cart, no pressure.
Is it actually tested?
Every batch is third-party tested - HPLC for purity, mass spectrometry for identity - and ships with a dated Certificate of Analysis you can request before you buy. We've shipped worldwide for over six years.
Is this medical advice?
No. Retatrutide is supplied strictly as a research compound for laboratory and research use only. Nothing here is medical advice; always speak to a qualified clinician about your personal circumstances.
The BioStack Promise
A lab that shows up - before, during and long after you order.
No anonymous checkout. No vanishing sellers. Real people, real support, every step of the way.
Out the door in 2 minutes
Confirm your order and it is packed and dispatched straight from our facility within minutes - not weeks.
Full aftersales service
Dosing guidance, reorders and questions - our team looks after you long after your order is delivered.
We never ghost you
A real BioStack specialist stays with you start to finish. You are never left on read.
24/7 live chat
Talk to our health professionals any time, day or night - seven days a week.
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24/7 live chat available · Talk to our health professionals anytime

The window is open. The choice is yours.

Stop fighting your own biology. Talk to a BioStack specialist, get the data, and start with the only triple-agonist - the smart way.

Talk to a Specialist Now 24/7 live chat · Talk to our health professionals anytime · Research use only
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