1. From Gut Hormone to “Wonder Drug”
If you strip away the hype, semaglutide is simply a clever copy of a natural hormone that tells the body “you’ve eaten enough.”[1]
In the 1980s and 1990s, researchers discovered that the gut hormone GLP‑1 could lower blood sugar, slow digestion and curb appetite, but the natural hormone disappeared from the body within minutes.[2][3]
So Novo Nordisk chemists spent years “armouring” GLP‑1—tweaking its structure so it survived longer in the bloodstream and could be given as a weekly injection instead of a constant drip.[4][5]
One of those tweaked versions was semaglutide, designed to stay active for around a week, which made it practical for real‑world use in diabetes and, later, obesity.[6][7]
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