The presenter – who is engaged to model Luke Worrall – is unhappy about the conditions farm animals are reared in and has stopped eating certain foods.
She said: "I've become increasingly aware of how disgusting the American meat industry can be – and it's seriously put me off eating meat. I've heard that cows are fed through a hole in their stomach to make them get fatter quicker and I can't believe some chicken producers inject them with water first so they're heavier!"
Despite her concerns, Kelly has decided not to completely stop eating meat, but is being more careful about what she buys.
She added in her Closer magazine column: "I don't have a problem with people eating meat, but I am careful to only buy organic now."