Prana & Breath is from Food
In the Vedic tradition, food is considered sacred. In Taitrya Upanishad food is said to be the Brahman. According to Chandogya Upanishad, prana or breath is from food and thus the cause of our being alive.
The cosmos constituted of the five fundamental elements (ether, air, fire, water and earth) has two principal divisions: jadda and chetana. Jadda are all the non-livings whereas chetana are those with soul and have their independent functional system. In chetana, the five elements take the form of three doshas or three principal energies (vata, pitta and kapha) to perform all the physical and mental functions of a living being.