Q: What made you examine this technique through a cellular biology lens?
A: In 2005, I noticed while I was practicing pranayama, I was producing so much saliva that I was almost drooling. I wondered why and what the overall impact of that was. This led me and my team to study whether increased saliva production was a common response to the practice, and we found that it was. Saliva has numerous antibodies and proteins that do everything from suppressing tumors to regenerating the liver. For example, it contains immunoglobulin, which are antibodies that bind to germs, as well as DMBT1, a tumor suppressor that blocks the conversion of normal cells to cancer cells.
Q: Your 2015 study in International Psychogeriatrics showed that pranayama does more than just increase salivation. Can you elaborate?
A: Yes, it changes the makeup of saliva by increasing the amount of nerve growth factor (NGF). When NGF is produced, it’s transported to the brain, where it signals nerve cells to grow or survive longer. Increased NGF could have a major impact on aging, and specifically on some of the degenerative diseases of the day like Alzheimer’s and cancer.
(source: http://discovermagazine.com/2019/apr/take-a-deep-breath )