Peptides

Sermorelin Explained: A GHRH Analog That Was FDA-Approved, Then Wasn’t

Sermorelin is a strange case. It was once FDA-approved — sold as Geref, studied in multicenter pediatric trials, used in endocrine clinics for more than a decade. The manufacturer voluntarily pulled it from the market in 2008 for commercial reasons, not safety concerns. And now it lives almost entirely as a compounded peptide marketed by

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Pramlintide (Symlin) Explained: The Amylin Analog Used Alongside Insulin

If you take mealtime insulin and still struggle with blood sugar spikes after meals, you may have been told there is nothing else left to try. Is that actually true? And if another FDA-approved injectable exists for exactly that situation, why has almost no one heard of it? Pramlintide — sold as Symlin — has

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Exenatide (Byetta, Bydureon) Explained: The First GLP-1 and Why It Came From a Lizard

If you have heard that Ozempic owes its existence to a lizard, the honest answer is yes — but the full story runs through a Bronx veterans' hospital, three decades of skepticism, and a regulatory landscape that looked very different before anyone had heard of semaglutide. Exenatide was the first GLP-1 receptor agonist to reach

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Dulaglutide (Trulicity) Explained: A Weekly GLP-1 With a Cardiovascular Outcomes Story

If you are reading about Trulicity because someone in your life takes it for weight loss, the first thing worth knowing is that dulaglutide does not have an FDA-approved weight-management indication. It never has. The confusion is understandable — Trulicity belongs to the same GLP-1 receptor agonist drug class as Ozempic and Wegovy, and the

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Liraglutide (Saxenda, Victoza) Explained: The Daily GLP-1 That Started the Class

If you have heard about Ozempic or Wegovy in the past few years, you may not realize those drugs belong to a class that has been in clinical use since 2010, built on a molecule called liraglutide. The natural question is whether the original version is still relevant now that once-weekly alternatives dominate the headlines.

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Abaloparatide (Tymlos) Explained: The Second FDA-Approved Bone-Builder

Osteoporosis drugs have a reputation problem. Most people picture them as bone-preserving at best — slowing breakdown, not adding new tissue. That impression is accurate for bisphosphonates, which is exactly why a second FDA-approved anabolic peptide often surprises people. If your doctor mentioned abaloparatide, your first questions are probably: Is this just another version of

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Calcitonin (Salmon) Explained: An Older Bone Peptide With a Narrowed Indication

Salmon calcitonin has been around long enough that most physicians learned about it before newer bone drugs existed. It was FDA-approved decades ago, once used widely for osteoporosis, and still carries approved indications today. But it also carries something else: a 2014 regulatory narrowing driven by a cancer risk signal and, separately, a long-running question

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Vasopressin and DDAVP Explained: Peptides for Diabetes Insipidus and Nocturnal Enuresis

📚 Researched & cited by UV Editorial Team 2 PubMed sources verified · Last updated: May 15, 2026 · Our research methodology → 🧬 New to peptides? Start with our complete beginner’s guide → Summary: What You Actually Need to Know Here is the question most readers arrive with: are vasopressin and DDAVP the same

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Glucagon Explained: The Emergency Peptide for Severe Hypoglycemia

If you have type 1 diabetes, or you love someone who does, you have probably been told to keep a glucagon kit somewhere accessible. Maybe it is in a kitchen drawer, a bedside table, a school nurse's cabinet. What you may be less clear on is what glucagon actually is, how it works, which of

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