Dr Josef Kees recently lectured in the UK on Toxins - their inter-relationship to the immune system. He cited cases he had treated. For example, one where a woman getting constant colds and vitamin C deficient was, in fact, suffering from mercury poisoning; another had allergy problems, in fact, due to titanium in her toothpaste and make-up; and a third patient whose mouth and throat infections were actually due to residual formaldehyde.