However, that study was not well designed scientifically. A new study confirms the apparent benefit of magnets for diabetics. It's a test that measures how well nerves are conducting signals from the feet. And the results for Jeanette Castner show that her diabetes has, in fact, damaged those nerves. In her case it has made her feet extremely numb, which is much more serious than it sounds.
Doctors test how well nerves conduct signals from the feet.
All of a sudden, you would see blood, because you had a blister, you don't feel that at all. The problem is called diabetic neuropathy, and it is a major disabler of people with diabetes. Test subjects inserted magnetic insoles into their shoes. They then rated their pain twice a day for four months. The trick was making sure that the pain relief was really due to the magnets.