Hello, Nenad:
The infusion of ginger should not be starchy, since it does not contain the pulp. Although I have tested ginger root, I have not tested the tea made from this root, but believe the essential oils and characters from it which make it into the water would be essentially safe. Potato starch is quite water soluble but other starches are usually more difficult to come out of matrix. Although I have not had any trouble with ginger tea, it could contain enough starch to cause trouble with others. I will test it, next time I make some.
HEALTH,
John
