It is as important to realise that every food's unique combination of attributes will influence its taste and the action it causes in the body. With every taste having a different action – as detailed below. Astanga Hrdayam clearly describes the characteristics of each of the six tastes and problems that might be experienced from its habitual over-consumption. Most foods being a combination of two or more of these tastes e.g. coffee is bitter and pungent.

Sour

Comprised of the elements earth & fire, it increases pitta and kapha and is good for heart and digestion. Stimulates agni, moves inactive Vata energy down the pelvic cavity, sets the teeth on edge and increases salivation. Excess use may cause looseness and flabbiness, loss of strength, giddiness, itching, irritation, a whitish yellow pallor, herpetiform lesions, swelling thirsts and fever, and diseases arising from excess pitta and kapha.

Sweet

Related to earth & water, it mitigates pitta and vata, producing greater strength in the tissues and of value to the aged, wounded, emaciated and children. Universally liked, it often adheres to the inside of the mouth, giving a feeling of pleasure, contentment and comfort. Good for the complexion, hair, senses and ojas, it also increases breast milk and helps unite broke parts like bones. By its virtue it prolongs life and helps life activities. In excess however it may cause diseases arising from fat and excess kapha e.g. obesity, dyspepsia, unconsciousness, diabetes, enlargement of neck glands or malignant tumors.

Salt

The water & fire in salty taste increases pitta and kapha. It clears obstruction of channels and pores and increases the digestive activity and salivation. Also responsible for lubrication and sweating, it penetrates the tissues. An excess of it may cause baldness and graying of the hair, wrinkles, thirst, skin diseases, blood disorders, herpetiform leisons and loss of body strength

Pungent

Fire & air in pungent increases vata and pitta and mitigates kapha. Increases hunger, is digestive, causes irritation, brings secretion from the eyes, nose & mouth, and gives a burning sensation to the mouth. Dilating the channels and breaking up the hard masses. But an excess use of it may cause thirst, depletion of reproductive tissue and strength, fainting, contracture, tremors, pain in the waist and back, and other disorders related to excess of pitta and kapha.

Bitter

Air & space being its elements, it mitigates pitta and kapha. Drying up moisture from fat, muscles, faeces and urine. It cleans the mouth and destroys the perception of taste. It is said to cure anorexia, worms, bacteria, parasites, thirst, skin diseases, loss of consciousness, fever, nausea, burning sensation. But in excess, it increases vata, causing diseases of vata origin and depletion of tissues.

Astringent

Air & earth increases vata and mitigates increased pitta and kapha. It cleans the blood and causes healing of ulcers. Like bitter, it too dries up moisture from fat. It absorbs water, causing constipation and hindering digestion of undigested food. Its excess use causes stasis of food without digestion, flatulance, pain in the cardiac region, emaciation, loss of virility, obstruction of channels and constipation.

Healthy Diet  | Choice of Food | Uneasy Combinations
Role of Taste | Taste Process | Food Chart