Collagen isn't just 'body glue'—it’s more like a motor that cranks itself tight to make your bones rock hard.
March 30, 2026
Original Paper
The Molecular Origin of Water-Mediated Collagen Contraction
bioRxiv · 10.64898/2026.03.27.713712
The Takeaway
Scientists previously thought collagen was a passive scaffold for our skeleton. This discovery reveals that specific electrical charges in collagen force it to contract when it dehydrates, actively creating the internal pressure that gives bones and teeth their legendary toughness.
From the abstract
The mechanical toughness of bone and teeth relies on residual stresses generated during mineralisation, where the dehydration of collagen fibrils leads to contraction, putting the mineral phase under compression. While macro-scopic stiffening of collagen upon drying is well-documented, the atomic-level structural rearrangements driving this phenomenon have remained elusive. By performing molecular dynamics simulations, we demonstrate that collagen contraction is not homogeneous but is driven by