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*''Rasa'' (taste) is one of the attributes present in ''dravyas'' (substances), which can be perceived by the tongue.

*''Rasa'' (taste) is one of the attributes present in ''dravyas'' (substances), which can be perceived by the tongue.

**There are six ''rasas, madhura'' (sweet), ''amla'' (sour), ''lavana'' (salty), ''katu'' (pungent)'', tikta'' (bitter) and ''kashaya'' (astringent).

**There are six ''rasas, madhura'' (sweet), ''amla'' (sour), ''lavana'' (salty), ''katu'' (pungent)'', tikta'' (bitter) and ''kashaya'' (astringent).

**Each ''Rasa'' is composed of two ''mahabhutas'' (basic elements). Madhura rasa is made up of prithvi and apa, amla rasa of prithvi and agni, lavana of apa and agni, katu of vayu and agni, tikta of vayu and akasa , and kashaya is made up of vayu and  prithvi.

**Each ''Rasa'' is composed of two [[mahabhuta]] (basic elements). Madhura rasa is made up of [[Prithvi]] and [[apa]], amla rasa of [[Prithvi]] and [[agni]], lavana of [[apa]] and [[agni]], katu of [[vayu]] and [[agni]], tikta of [[vayu]] and [[akasha]] , and kashaya is made up of [[vayu]] and  [[Prithvi]].

*Rasas influence doshas which influence health and disease. For example: madhura, amla and lavana aggravate kapha, while katu, tikta, and kashaya pacify it. Similarly, amla, lavana and katu aggravate pitta while madhura, tikta, and kashaya pacify it. And katu, tikta and kashaya aggravate vata, while madhura, amla and lavana pacify it. Thus, three rasa aggravate one dosha, whereas others pacify it. Proportionate use of all six rasas in a diet is considered healthy practice and forms the basis of a superior satmya.

*Rasas influence [[dosha]] which influence health and disease. For example: madhura, amla and lavana aggravate [[kapha]], while katu, tikta, and kashaya pacify it. Similarly, amla, lavana and katu aggravate [[pitta]] while madhura, tikta, and kashaya pacify it. And katu, tikta and kashaya aggravate [[vata]], while madhura, amla and lavana pacify it. Thus, three rasa aggravate one [[dosha]], whereas others pacify it. Proportionate use of all six rasas in a diet is considered healthy practice and forms the basis of a superior [[satmya]].

**The three aggravator rasas have similar mahabhuta constitution as the dosha while the other three pacifier rasas have opposite mahabhuta constitution.

**The three aggravator rasas have similar [[mahabhuta]] constitution as the [[dosha]] while the other three pacifier rasas have opposite [[mahabhuta]] constitution.

**Manifestations of panchmahabhautic constitution of dravya follows rules of cause and effect in regards to relationship between rasa, vipaka and veerya and is known as prakriti samasamaveta with an exception of vikrati visham samveta. Same rule is followed by interplay between doshas in genesis of disease.

**Manifestations of panchmahabhautic constitution of dravya follows rules of cause and effect in regards to relationship between rasa, vipaka and veerya and is known as prakriti samasamaveta with an exception of vikrati visham samveta. Same rule is followed by interplay between [[dosha]] in genesis of disease.

**If dravya and manifestations of interplay between doshas do not follow cause and effect rules, then it is called vikrati vishamasamaveta.

**If dravya and manifestations of interplay between [[dosha]] do not follow cause and effect rules, then it is called vikrati vishamasamaveta.

*Certain drugs are very effective but have side effects when used for prolonged periods, and therefore should be used carefully, such as pippali, kshara and lavana.

*Certain drugs are very effective but have side effects when used for prolonged periods, and therefore should be used carefully, such as pippali, kshara and lavana.

*There are eight guidelines for taking food ,called ahara vidhi visheshayatana (please see the chart given below).

*There are eight guidelines for taking food ,called ahara vidhi visheshayatana (please see the chart given below).

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| 1 || ''Prakriti''|| It indicates the natural qualities of the food articles i.e. the inherent qualities like guru (heavy), ''laghu'' (light) etc.

| 1 ||[[Prakriti]]|| It indicates the natural qualities of the food articles i.e. the inherent qualities like guru (heavy), ''laghu'' (light) etc.

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| 2 || ''Karana''|| The process or preparation of food. The method of preparation and processing of food changes the natural quality of the food.   

| 2 || ''Karana''|| The process or preparation of food. The method of preparation and processing of food changes the natural quality of the food.   

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| 1 || ''Ushnamashneeyaat''|| Warm food is relished, it enhances agni, gets digested early and stimulates the peristaltic movements and there by evacuates vata, reduces the kapha in intestinal area.

| 1 || ''Ushnamashneeyaat''|| Warm food is relished, it enhances [[agni]], gets digested early and stimulates the peristaltic movements and there by evacuates [[vata]], reduces the [[kapha]] in intestinal area.

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| 2 || ''Snigdhamashneeyaat''|| Unctuous food is relished, stimulates agni and peristaltic movements, the body is adequately nourished, strengthens the sense organs and also enhances vigour and complexion.   

| 2 || ''Snigdhamashneeyaat''|| Unctuous food is relished, stimulates [[agni]] and peristaltic movements, the body is adequately nourished, strengthens the sense organs and also enhances vigour and complexion.   

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| 3 || ''Maatraavadashneeyaat'' || In appropriate quantity, the food enhances the life expectancy of the person by keeping the tridoshas- vata, pitta and kapha in balance, gets easily propelled down towards the rectum, does not affect the digestive power and thus gets digested and assimilated without any disturbances.

| 3 || ''Maatraavadashneeyaat'' || In appropriate quantity, the food enhances the life expectancy of the person by keeping the tri[[dosha]]- [[vata]], [[pitta]] and [[kapha]] in balance, gets easily propelled down towards the rectum, does not affect the digestive power and thus gets digested and assimilated without any disturbances.

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| 4 || ''Jeerne ashneeyaat'' || The food should be eaten only after complete digestion of the previous meal as it is going to maintain the harmony of the doshas in their respective places, the agni is stimulated, the person develops the appetite, the channels are free of adherents and open, he gets the healthy eructation from the mouth, stomach is clear, peristaltic movements are normal, urges of flatus, urine and faeces are well attended to, that food is going to serve the sole purpose of promoting life by not vitiating any components of the body.

| 4 || ''Jeerne ashneeyaat'' || The food should be eaten only after complete digestion of the previous meal as it is going to maintain the harmony of the doshas in their respective places, the [[agni]] is stimulated, the person develops the appetite, the channels are free of adherents and open, he gets the healthy eructation from the mouth, stomach is clear, peristaltic movements are normal, urges of flatus, urine and faeces are well attended to, that food is going to serve the sole purpose of promoting life by not vitiating any components of the body.

If eaten while the previous meal is still in the stomach undigested, the newly consumed food mixes with the partially digested one and provokes the tridoshas.  

If eaten while the previous meal is still in the stomach undigested, the newly consumed food mixes with the partially digested one and provokes the tri[[dosha]].  

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| 5 || ''Veerya aviruddham ashneeyat'' || If antagonistic food is not eaten, the person is not afflicted with disorders born of incompatible diet (18 types of incompatible dietary as explained in [Cha.Sa.[[Sutra Sthana]] 26/85-101].

| 5 || ''Veerya aviruddham ashneeyat'' || If antagonistic food is not eaten, the person is not afflicted with disorders born of incompatible diet (18 types of incompatible dietary as explained in [Cha.Sa.[[Sutra Sthana]] 26/85-101].