food and the body
What are sattvic, rajasic, and tamasic foods?
The three kinds
The idea comes from the three gunas, the qualities tradition sees running through everything. Sattvic foods are fresh and simple, like fruit, vegetables, grains, milk, and ghee, and are linked to a clear, calm mind. Rajasic foods are spicy, sour, very salty, or strongly stimulating, and are linked to energy and restlessness. Tamasic foods are stale, overcooked, or heavy, and are linked to dullness. The Gita speaks of food falling into these three kinds.
The idea behind it
Behind this is the belief that food shapes not only the body but the mind and mood. Eating mostly sattvic food is thought to support the calm, clear state that suits prayer, study, and meditation. So choosing food becomes part of looking after one's inner state, not only one's health.
What science says
Modern nutrition does not use these categories, and there is no evidence that food changes a person's gunas. That said, the general lean toward fresh, simple, mostly plant-based food overlaps loosely with common healthy-eating advice.
In everyday life
Today many people use sattvic loosely to mean light vegetarian food, and the word has spread into yoga and wellness circles well beyond Hindu households.