Lobster secrets

Its taken seven years
And cost a packet
And astaxanthin
Is the substance they
Noted has been
The poor lobsters secret
When cooked it turned
From blue to red
Okay
When molecules
Are bound together tightly
The material appearance
Is its blue
But when cooking it
Of course its is denatured
Its unbound state
Is orange
Take a view

That that amazing fact
Is seen as marvellous
Safe colourings
To give
our food some zest
Dyes that could be permanent
For clothing
And all this brain work
Makes me want to rest