Caitlyn Jenner ditches Bruce's dirty eating habits but she's still hooked on that cigarette

Los Angeles - Caitlyn Jenner has become a vegetarian.

The 65-year-old reality TV star, who was known as Bruce Jenner before undergoing gender transition in May, has followed in the footsteps of Beyoncé and Carrie Underwood by embracing a plant-based diet in recent months in a bid to lose weight.

A source close to the former Olympian, who has been showing off her trim figure in an array of figure-hugging dresses in recent weeks, said: "She really changed all aspects of her life after her transition, including the way she ate.

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"She stopped eating meat almost entirely and started eating more soy products to help decrease the testosterone and increase estrogen. [She] has given up meat and is eating only small portions in bid to drop old Bruce pounds."

Caitlyn has also hired a nutritionist to help her plan healthy meals.

The insider told Us Weekly magazine: "Caitlyn's very proud of her new body."

While the statuesque brunette has been busy overhauling her diet, friends are worried she is smoking cigarettes.

One pal told gossip website RadarOnline.com: "All of Cait's friends are hoping she can kick this filthy habit, which was a real problem for Bruce and played havoc on his health for years."