Escrito por Alexander · Entrenador Personal Certificado ISSA
Weight-loss peptides have become one of the most sought-after fat-loss tools in Colombia and worldwide. Unlike classic anabolics, these compounds don’t build muscle — they reduce appetite and improve metabolism for steady, sustainable weight loss. This guide covers Tirzepatide and Retatrutide: how they work, dosing protocols, expected results, and how they compare to Ozempic.
Tirzepatide and Retatrutide are incretin receptor agonists — they mimic hormones your gut releases after eating that regulate appetite, satiety and blood sugar.
They don’t add muscle directly. Their power is in controlling hunger, prolonging fullness and increasing fat use for energy, which makes staying in a calorie deficit far easier.
Semaglutide (Ozempic®/Wegovy®) is a single GLP-1 agonist. Tirzepatide adds GIP and, in head-to-head studies, produces greater weight loss than semaglutide. Retatrutide’s triple action is more powerful still. So while we don’t carry semaglutide, the compounds we do carry are a step up. Browse weight-loss peptides.
| Feature | Tirzepatide | Retatrutide |
|---|---|---|
| Agonist type | Dual (GLP-1/GIP) | Triple (GLP-1/GIP/Glucagon) |
| Weight-loss power | High | Very high |
| Fat burning | Good | Excellent (glucagon action) |
| Best for | First use, moderate loss | Advanced loss, plateaus |
| Tolerance | Very good | Good (titrate carefully) |
General recommendation: if it’s your first GLP-1 peptide, Tirzepatide is the ideal starting point for its tolerability. Retatrutide is for more aggressive goals or breaking a plateau.
The key to success is titration — start low and increase gradually every 4 weeks to minimize side effects.
Start titration with the Tirzepatide 10mg vial; the 30mg vial is cheaper per milligram once you reach maintenance.
Begin with the Retatrutide 15mg vial and keep the 60mg vial for extended protocols.
Notes: inject subcutaneously (abdomen, thigh or arm) once per week. Never move up a step early — if a dose is working, hold it.
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With correct use and a sensible diet:
You’ll usually notice reduced appetite in the first week and scale movement from week two or three. Consistency is what makes the difference.
No. GLP-1 peptides don’t suppress testosterone, so no post-cycle therapy is needed — unlike anabolic steroids.
Most side effects are mild and appear early or when increasing dose:
To minimize: titrate slowly, eat smaller and lower-fat meals, stay well hydrated, and get enough protein (1.8–2.2 g/kg) to preserve muscle while losing fat.
Precautions: not recommended with a history of pancreatitis, certain thyroid cancers, or severe digestive issues. Bloodwork and medical checks are ideal.
Will I lose muscle? Some lean-mass loss can happen in any weight-loss process. Strength training and adequate protein minimize it.
How often do I inject? Once per week, subcutaneously.
What happens when I stop? Appetite returns gradually — so build good eating habits during use to keep your results.
I’m visiting Colombia — can I order these? Yes, with delivery to your hotel or address. See our foreigner’s guide for payment and delivery.
Ready to start? Build your order or message us on WhatsApp for guidance on dosing and titration.
