Peptides

Teriparatide vs. Abaloparatide: Comparing the Two FDA-Approved Bone-Building Peptides

If your doctor has raised the subject of bone-building injections for osteoporosis, you have likely encountered two names: teriparatide (Forteo) and abaloparatide (Tymlos). Both require a daily subcutaneous shot, both are capped at 24 months of lifetime use, and both target the parathyroid hormone receptor. So which one is better — and does the difference […]

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SS-31 (Elamipretide) Explained: A Mitochondrial Peptide in Late-Stage Trials

You may have encountered SS-31 in a longevity blog, a biohacking forum, or — if you searched long enough — listed in the catalog of a grey-market peptide vendor. The pitch is usually some version of: "mitochondrial optimizer, clinically tested, fights aging at the cellular level." The reasonable question is whether any of that reflects

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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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