This article is from the Tinnitus FAQ, by firstname.lastname@example.org (Mark Bixby) with numerous contributions by others.
The cochlea has the body's greatest concentration of zinc. Supplements
of 90-150 mg per day may be beneficial in some cases. BUT BEWARE: high
levels of zinc interfere with the body's absorption of copper, leading
to anemia. Several studies have identified the 150mg dosage as leading
to toxicity problems. Zinc therapy when prescribed by physicians is
often accompanied by frequent blood tests to monitor copper levels.
Zinc has not been formally tested for the treatment of tinnitus.