The crux of Dr. Gundryâs method stems from his research that started years ago at Yale University - that our mind and body are locked into an eons-old âcomputer programâ that is very fundamental, logical and, ultimately, easy to control.
Why do hearing aids cost so much? One reason is that hearing aids are sold in relatively low volume (approximately 1.7 million hearing aids for some 30 million people with hearing loss). Also, the amount of time and money spent by manufacturers on research and development is considerable.
Finally, our friend who can make that hearing aid for $100 might be interested to know that the cost of hearing aids, corrected for inflation, has remained relatively stable over the last 35 years. Figure 1 illustrates the average cost of a hearing aid from 1975 to 2010.