The Compendium of Caraka 1.27.3

1.27.3

iṣṭavarṇagandharasasparśaṃ vidhivihitamannapānaṃ prāṇināṃ prāṇisaṃjñakānāṃ prāṇamācakṣate kuśalāḥ pratyakṣaphaladarśanāt tadindhanā hyantaragneḥ sthitiḥ tat sattvamūrjyati taccharīradhātuvyūhabalavarṇendriyaprasādakaraṃ yathoktamupasevyamānaṃ viparītamahitāya saṃpadyate //

The skilled declare food and drink that possesses desirable colour, smell, taste, and touch, and is prepared according to rule, to be the life of living beings designated as creatures, because its result is directly perceptible. For the maintenance of the internal fire has this as its fuel; it invigorates the mind; it brings about the proper arrangement of body tissues, strength, complexion, and clarity of the sense organs when consumed in the manner stated; [and] the opposite leads to harm.