----- Original Message -----
From: "Henry Tsao" <[log in to unmask]>
> I heard the other day that the main constituent of soft tissue in the body
> is collagen, which is primarily made from zinc.
No, the main constituent of soft tissue in the body is water.
Even assuming your original presumption about collagen to be correct, I seem
to remember that the main constituents are good old-fashioned carbon,
hydrogen, oxygen, nitrogen and sulphur.
Next question?
Dr Robert Treharne Jones
GP and Trainer, Walnut Lodge, Torquay
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