Hi. I'm making an effort to avoid flouride but am having trouble finding an affordable flouride-free toothpaste. So far, the only place I've managed to find any is Holland and Barrett, but every tube they have has a price tag of at least £4.50. I'm on a limited income at the moment so I've been trying to find one that is closer to the same price as normal colgate or something but I've had no success so far. Any ideas?