Bhagavad Gita
17.9

कट्वम्ललवणात्युष्णतीक्ष्णरूक्षविदाहिनः | आहारा राजसस्येष्टा दुःखशोकामयप्रदाः ||

kaṭv-amla-lavaṇāty-uṣṇa-tīkṣṇa-rūkṣa-vidāhinaḥ āhārā rājasasyeṣṭā duḥkha-śokāmaya-pradāḥ

Translation

Foods that are bitter, sour, salty, very hot, pungent, dry, and burning — these are liked by the rajasic; they produce pain, grief, and disease.

Interpretation

Rajasic food: excessively stimulating foods that excite the passions and agitate the nervous system. The qualities — bitter, sour, salty, very hot, pungent, dry, burning — describe highly processed, spicy, and artificially flavored foods as well as alcohol. These foods produce pain (duhkha), grief (shoka), and disease (amaya) because they create temporary excitation followed by crash, disturb digestive fire, and inflame the passions. The rajasic person reaches for these foods for stimulation, just as they reach for stimulation in all other areas of life. Diet and consciousness mutually reinforce each other.