Would you use water collected from a copper roof in your vegetable garden?

I'm not sure whether the veggies would get too much copper if I used the rainwater collected from the copper roof. The rainpipes are also made of copper.
What do you think? Am I being paranoid?

If you use a first flush system you should be okay, taste the water and if it has an unpleasant metallic or bitter taste there may be high levels. You can get copper test kits from aquarium or pool supply stores if you're worried. You can read about copper toxicity here.

Thank you for the tip concerning the copper test kits. I will definitely get one and test the water.
And thanks for the informative link.