Hearing loss could soon be a thing of the past after two new studies have brought scientists a step closer to developing a pill that may prevent noise-induced, and maybe also age-related hearing loss in humans.
In the studies, scientists found that vitamin supplements prevented hearing loss in laboratory animals.
The supplements used in the studies are composed of antioxidants - beta carotene and vitamins C and E - and the mineral magnesium.
When administered prior to exposure to loud noise, the supplements prevented both temporary and permanent hearing loss in test animals.
"What is appealing about this vitamin 'cocktail' is that previous studies in humans, including those demonstrating successful use of these supplements in protecting eye health, have shown that supplements of these particular vitamins are safe for long-term use," said senior author Colleen Le Prell, Ph.D., a researcher at the University of Florida.
In the first study, UF, University of Michigan and OtoMedicine scientists gave guinea pigs the vitamin supplements prior to a four-hour exposure to noise at 110 decibels, similar to levels reached at a loud concert.
Researchers assessed the animals' hearing by measuring sound-evoked neural activity and found that the treatment successfully prevented temporary hearing loss in the animals.