Will going vegan make you healthier?

Vegans, for the uninitiated, do not eat meat, poultry, fish, or any products derived from animals, including eggs, dairy products, and gelatin.
So how hard is it to convert, and what are the potential health benefits?
For the latest series of Trust Me I'm A Doctor, Dr Giles Yeo decided to try it for a month and see if it was a lifestyle he could imagine adopting.
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