How does cancer spread in our body?

Cancer metastasis, where the cancer spreads from its original place to the other pars of the body is the main cause for 90% of cancer deaths.
Research has shown that an enzyme called LOX is the culprit in spreading merastasis.
The drugs to block the production of this enzyme in the body can control the spread of cancer to a great extent.
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Why does hair become grey?

Everybody likes to have blach hair. But my grandfather's hair is totally grey. Why is it so? May be because of some chemical reactions that had occured in his body might have resulted in the bleaching of his hair. What reaction could that be?
Accoding to Deumatology research, the shortage of an enzyme called catalase in the body results in bleaching of hair. The shortfall of catalace results in accumulation of hydrogen peroxide which is naturally present in the human hair. This accumulation of which cannot be broken down into hydrogen due to the shortfall of catalase results in hair bleach.
It is not impossible that I may see my grandfather again with beautiful abundant blach hair as I beleive firmly that the dermatologists will come out woth a solution to correct the shortfall of catalase in the human body.