Agni
Also known as: Digestive Fire, Jatharagni
Sanskrit: agni, meaning fire; also the name of the Vedic fire deity.
Agni, meaning fire, refers in Ayurveda to the body's digestive and metabolic fire, responsible for transforming food and experience into usable energy and, when balanced, into healthy tissue. Ayurvedic diagnosis and treatment place strong emphasis on assessing and supporting agni, since weak digestive fire is considered a root cause of imbalance.
Ayurveda describes several types of agni, with Jatharagni, the main digestive fire in the stomach and small intestine, considered most important, supported by additional metabolic fires at the level of individual tissues, or dhatus. Traditional Ayurvedic guidance for supporting agni includes eating at regular times, favoring warm and freshly cooked food, and avoiding combinations and quantities of food considered to dull digestive capacity over time.
Ayurvedic texts describe four states of agni: balanced (sama), irregular (vishama), sharp (tikshna) and slow (manda), each linked to a different pattern of dosha imbalance and digestive symptom. Traditional guidance for strengthening agni favors warm, freshly cooked meals eaten at regular times, warming spices like ginger and black pepper, and avoiding cold drinks with food; this overlaps with, but is not identical to, the biomedical concept of metabolism, since agni is also said to govern the 'digestion' of sensory experience and emotion, not only food.
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Related Terms
Dosha
Doshas are the three fundamental energies of Ayurvedic physiology, Vata (air and space), Pitta (fire and water), and Kapha (earth and water), said to govern all physiological and psychological processes. Every person is understood to have a unique combination of the three, with imbalance believed to underlie illness.
Ojas
Ojas is the Ayurvedic term for the subtlest and most refined product of healthy digestion, described as the reserve of vitality, immunity, and resilience that supports physical and mental strength. It is considered depleted by chronic stress, poor digestion, and irregular sleep, and supported by balanced digestion and nourishing routines.