Tiny pieces of collagen don't just become building blocks — they send messages to your cells to make more collagen.
Evidence from Studies
Supporting (3)
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Stimulation of type II collagen biosynthesis and secretion in bovine chondrocytes cultured with degraded collagen
When scientists fed cartilage cells broken-down collagen, the cells made more of their own collagen — but only when the collagen was broken up, not when it was whole. This means the tiny pieces of collagen act like signals telling the cells to rebuild tissue.
This study showed that taking collagen peptides after a tough workout turned on genes in muscles that help build and repair tissue, proving collagen pieces can signal the body to make more collagen.
When scientists added collagen pieces to skin cells in a dish, the cells started making more of the proteins that keep skin firm and healthy — proving collagen pieces can tell cells to build more collagen.
Contradicting (3)
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This study talks about how collagen talks to cells, but it doesn’t show that collagen pieces actually turn on genes to make more collagen or fix tissues.
People took collagen pills after workouts, but their bodies didn’t make more collagen — so sometimes, these peptides don’t do what they’re claimed to do.
People took collagen supplements for 15 weeks while lifting weights, but their tendons didn’t get stronger or bigger — so the peptides didn’t help rebuild tissue like claimed.