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A cure for fragile bones?

Your skeleton is effectively replaced every seven years. But as you get older, bone is broken down more quickly than it is built up, causing osteoporosis (brittle bone disease) in some people. Scientists have identified a gene for a protein - cathepsin K - that destroys bone. By 2005, new medicines may be available to stop cathepsin K working, and so slow down osteoporosis.

By 2005, new medicines may be available to slow down osteoporosis.
By 2005, new medicines may be available to slow down osteoporosis.
Prof A Boyde/Wellcome Photo Library

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