Is cold brewed tea more healthy?

I like to drink plain cold (or room temp, i dont really enjoy hot drinks much) green tea. The taste is pleasant and they say it can help burn some fat, and that it has antioxidants. Sometimes at night i place two green tea bags in a bottle of cold water and let it sit over night so it is already prepped in the morning. Is it more healthy because it steeped in cold water? I heard heat often destroys nutrients. So am I getting more antioxidants?

2017-04-11T00:37:33.809Z