Orange juice just off the shelf in the grocery store will contain 0.1-0.3% alcohol. As it sits it'll go up to about 0.5, the same as NA beer. I checked with my doctor about that and she told me not worry, it wasn't enough to have any real effect on the body. Besides, alcohol is in so many things there's no way to totally avoid it. Any processed food will have trace amounts. Do you know why bread baking smells so good? It's the alcohol produced by the yeast baking off and it never goes away entirely.