Is there any evidence to back up claims that green tea speeds up burning body fat and is there any other types of food good for this?

Yes, good evidence: Quoting http://bit.Ly/17jtwfa "clinical studies suggest that green tea extract may boost metabolism & help burn fat.One study found that the combination of green tea and caffeine improved weight loss & maintenance in people who were overweight & moderately obese. Some researchers think that substances in green tea known as catechins are responsible for the herb's fat-burning effect." see comment:.