Breath of Fire is a technique that helps to balance the inhale and exhale, stimulating the body and mind. This practice can increase energy, clear the mind and increase lung capacity, oxygen flow to the brain, and release toxins from the lungs. It also regulates the brain-pancreas-endocrine pathway and stimulates the brainstem, cortex, efferent pathways and effector organs.

Read the science:
https://blog.caravanwellness.com/breath-of-fire/