Chapter Two

6 Tastes and Stages of Digestion

The digestive system is responsible for converting food into usable nutrients and consists of several key components: the mouth, pharynx, esophagus, stomach, small intestine, and large intestine/colon. Additionally, accessory organs include the liver, gallbladder, and pancreas. Together, these parts facilitate the mechanical digestion and chemical digestion of food for nutrient absorption. The digestive system performs five main functions: ingestion, propulsion, digestion, absorption, and elimination.

1Madhura Avastha Pāka, the sweet stage of digestion, begins in Bodhaka Kapha, the oral cavity, which governs salivary secretions from the parotid gland, submandibular gland, and sublingual glands and facilitates the perception of the 6 Rasas. The Bhūtas of Madhura are Prthivī (earth) and Āpas (water), representing the principle of Kapha-predominant liquefaction that nourishes asthāyi, immature Rasa Dhātu. Through mastication, mechanical digestion, and chemical digestion by the enzyme amylase, starches decompose into simple sugars and mix into a lubricated bolus, providing a feeling of fullness. When food touches the Jihvā, taste receptors send signals to the hypothalamus, where Sādhaka Pitta, located in the brain's grey matter for comprehension and emotions, processes this perception. Prāna Vāyu, moving in a downward and inward direction, initiates mastication and propels the bolus through the pharynx and esophagus via peristalsis into the fundus. There, Kledaka Kapha produces protective mucus to shield the stomach wall from digestive acids while Samāna Vāyu initiates the churning process. Madhura, yielded into Rasa Dhātu, is located on the tip of the tongue, Jihvā, and is energetically linked to the thyroid. Madhura stimulates the emotions of joy and contentment, and its Vipāka, post-digestive effect, is Madhura, which is anabolic and increases Kapha Dosha.

2Amla Avastha Pāka, the sour stage of digestion, occurs as the food bolus moves into the Āmāshaya (central stomach). The Bhūtas (elements) of Amla are Prthivī (earth) and Āgni (fire). Here, Jāthara Agni—manifesting as Pāchaka Pitta—secretes hydrochloric acid (HCl) and enzymes to initiate protein breakdown and destroy pathogens. Pepsin, a protein-digesting enzyme activated by HCl, is also released. Kledaka Kapha, the protective mucous membrane, and Pāchaka Pitta work in functional integrity to maintain the balance of Jāthara Agni and protect the stomach wall from acidity. As the bolus is churned into chyme, Samāna Vāyu facilitates its release in small amounts through the pyloric valve as it is forced against the pyloric sphincter via peristalsis into the duodenum. This phase releases the Vīrya (potent energy) of a substance, which is either Ushna (warming) or Shīta (cooling). From here, the sour taste is yielded into Rasa Dhātu (plasma). The location of the sour taste is on the anterior outer sides of the Jihvā (tongue) and is energetically linked to the lungs. The Vipāka (post-digestive effect) of Amla (sour) is Amla (sour), which is metabolic and increases Pitta Dosha

3Lavana Avastha Pāka, the salty stage of digestion, occurs as chyme moves into the duodenum (the first part of the small intestine). The Bhūtas (elements) of Lavana are Āpas (water) and Āgni (fire). This phase begins when Samāna Vāyu opens the pyloric valve, allowing the highly acidic chyme from the stomach to flow into the duodenum. Because the chyme entering from the stomach is highly acidic, the small intestine secretes a large amount of protective mucus to shield its lining. While the small intestine secretes small amounts of its own enzymes, most digestion occurs here through enzymes from the liver and pancreas, which enter the duodenum via a common duct. This process is stimulated by two duodenal hormones: secretin triggers the release of bicarbonates and water from the pancreas (Kloma Agni) to neutralize hydrochloric acid and inactivate pepsin, while cholecystokinin (CCK) stimulates the release of pancreatic digestive enzymes and bile (Rañjaka Pitta) from the liver and gallbladder. Samāna Vāyu facilitates the linear movement that pushes the chyme forward and regulates the water-electrolyte balance. From here, the salty taste is yielded into Rasa Dhātu (plasma). The inner surface of the entire small intestine features intricate folds lined with tiny projections called villi, which enhance its surface area for nutrient absorption. Even smaller hairlike extensions, known as microvilli, form the "brush border" on each villus, further increasing surface area. Lacteals, specialized lymphatic capillaries within the villi, play a crucial role in absorbing fats as chylomicrons, directing them into the lymphatic system for transport throughout the body. The location of the salty taste is on the posterior outer sides of the Jihvā (tongue) and is energetically linked to the kidneys. The Vipāka (post-digestive effect) of Lavana (salty) is Madhura (sweet), which is anabolic and increases Kapha Dosha.

4Katu Avastha Pāka, the pungent stage of digestion, occurs primarily in the jejunum (the second segment of the small intestine). The Bhūtas (elements) of Katu are Vāyu (air) and Agni (fire). This phase is governed by the functional integrity of Pāchaka Pitta and Samāna Vāyu. During this hour, the predominant intestinal enzymes exhibit pungent properties, facilitating the ongoing chemical breakdown of macronutrients, including proteins, fats, and carbohydrates. The fire element inherent to this stage enhances thermogenesis and increases blood circulation within the GI tract, promoting optimal enzymatic activity and turning the chyme yellowish-brown. Simultaneously, the air element produces gases and stimulates intestinal peristalsis via Samāna Vāyu, which is essential for the effective propulsion of digestive contents. While most absorption occurs in the ileum and colon, the jejunum serves as the major site for the initial absorption of Āhāra Rasa chyle. From here, the pungent taste is yielded into Rasa Dhātu (plasma). The location of the pungent taste is on the central part of the Jihvā (tongue), positioned in front of the bitter area, and is energetically linked to the heart, stomach, and diaphragm. The Vipāka (post-digestive effect) of Katu (pungent) is Katu (pungent), which is catabolic and increases Vāta Dosha.

5Tikta Avastha Pāka, the bitter stage of digestion, occurs as chyme progresses into the ileum (the terminal and longest segment of the small intestine). The Bhūtas (elements) of Tikta (bitter) are Vāyu (air) and Ākāsha (ether). This phase is characterized by the continued stimulation of Samāna Vāyu, which maintains peristalsis necessary for the efficient transit and rapid absorption of chyme through the intestinal villi. This stage exerts a systemic cooling effect on the body, helping to alleviate symptoms associated with elevated Pitta Dosha. From here, the bitter taste is yielded into Rasa Dhātu (plasma). The location of the bitter taste is on the central part of the Jihvā (tongue), positioned behind the pungent area, and is energetically linked to the liver, spleen, and pancreas. The Vipāka (post-digestive effect) of Tikta (bitter) is Katu (pungent), which is catabolic and increases Vāta Dosha.

6Kashāya Avastha Pāka, the astringent stage of digestion, is the final phase occurring in the Pakvashaya (large intestine). The Bhūtas (elements) of Kashāya are Vāyu (air) and Prthivī (earth). This process begins when Apāna Vāyu and Samāna Vāyu open the ileocecal valve, allowing chyme to enter the cecum. Within the large intestine, Apāna Vāyu governs the movement of material through the ascending colon, hepatic flexure, transverse colon, splenic flexure, and descending colon. During this phase, the remaining water, minerals, and electrolytes are absorbed into the system. The earth element provides the roughness and bulk necessary to compact waste material into well-bound feces (Purīsha) in the descending colon and sigmoid colon. This stage stimulates mass peristalsis, and the air element nourishes Poshaka Vata to facilitate the urge to defecate. The process culminates as the downward and outward energy of Apāna Vāyu propels the waste through the rectum and anal canal for elimination at the anus. Following this elimination, the air element stimulates Prāna Vāyu in the hunger center of the brain, signaling the return of true appetite and the activation of Jāthara Āgni. From here, the astringent taste is yielded into Rasa Dhātu (plasma). The location of the astringent taste is on the posterior part of the Jihvā (tongue) and is energetically linked to the colon. The Vipāka (post-digestive effect) of Kashāya (astringent) is Katu (pungent), which is catabolic and increases Vāta Dosha.

Circulation Map

Chapter Three

Vāta — the principle of movement

Vāta Dosha is the Ayurvedic principle of mobility that regulates all activity in the body and mind, from the flow of thoughts to the movement of food through the intestines. It governs all biological movement and carries the other two Doshas throughout the body. It is primarily composed of the Ākāsha (ether) and Vāyu (air) elements.

Vāta’s Gunas:

• Rūksha dry: leading to dry skin, hair, lips, tongue, colon, tending toward constipation and a hoarse voice
• Laghu light: light muscles, bones, thin body frame, light sleep and being underweight
• Shīta cold: resulting in cold hands and feet, poor circulation, dislike for cold environments prefers hot, tending toward stiffness of muscles
• Khāra rough: characterized by rough, cracked skin, nails, hair, teeth, hands and feet, and cracking joints
• Sūkshma subtle: associated with subtle fear, anxiety, insecurity, goose-bumps, muscle twitching, and fine tremors
• Chala mobile: leading to fast walking and talking, doing many things at a time, restless eyes, hands, and feet, unstable joints, many dreams, loves travelling and does not stay at one place, swinging moods, shaky faith, scattered mind
• Vishada clear: clairvoyant; understands immediately and forgets immediately; clear, empty mind, experiences void and loneliness

Vāta’s physical appearance, Ākruti is typically:

• body frame: thin, slender, often disproportionate; very tall or very short, with visible bones and prominent veins
• weight: generally low or underweight, with difficulty gaining weight

• nose: often thin, crooked, or uneven, may have a deviated septum
• eyes: small, sunken, dry, and active, the gaze is unsteady or darting, iris is dark, gray, or brown
• lips: thin, dry, and cracked, often with a brownish color tinge
• teeth: long, protruding, or irregular, with gaps between them, big thin gums
• skin: thin, dry, cold, and rough to the touch, tends to a darker complexion and tans easily
• hair: dry, brittle, curly or kinky; thin or scarce and prone to split ends and dandruff
• nails: dry, brittle, rough, break easily and may have grooves

Vāta’s physiology and behavior:

• digestion and appetite: Vishama Āgni, irregular digestion, with gas and bloating and a tendency to constipation, variable appetite
• sleep: light, interrupted sleep, especially in cold or noisy places
• speech: fast, spontaneous, sometimes slurred or disorganized
• psychology: when balanced, creative, joyful, and flexible. When imbalanced, prone to fear, anxiety, insecurity, restlessness, and indecision
• pulse: Sarpa moving like a snake, fast, feeble, cold, and thin, felt best under the index finger
• dreams: active and frequent, often of falling, flying, or being attacked

Pitta — the principle of transformation

Pitta Dosha is the Ayurvedic principle of transformation that regulates metabolism, digestion, and the conversion of energy throughout the body and mind. Primarily composed of the Āgni (fire) and Āpas (water) elements, it manifests as the heat and biochemical actions required for life.

Pitta’s Gunas:

• Ushna hot: good digestive fire, strong appetite, body temperature tends to be higher than average, dislikes heat tends toward gray hair with receding hair line or baldness, soft brown hair on the body and face
• Tikshna sharp: sharp teeth, distinct eyes, pointed nose, tapering chin, heart-shaped face, good absorption and digestion, sharp memory and understanding, intolerance of hard work, irritable, intellectual mind
• Laghu light: light to medium body frame, does not tolerate bright light, fair, shiny skin, bright eyes
• Drava liquid: loose liquid stools, soft delicate muscles, excess urine, sweat and thirst
• Snigdha oily: soft, oily skin, hair and feces, difficulty digesting deep-fried foods, which may cause headache
• Sara spreading: spreads as rash, acne, or inflammation over the body or affected areas, Pitta wants to spread their name and fame all over the world

Pitta’s physical appearance, Ākruti is typically:

• body frame: medium and well-proportioned, with good musculature and moderate strength
• weight: moderate and stable; seldom gains or loses much
• face: often heart-shaped, tapering, or triangular, with rosy or reddish cheeks
• nose: medium-sized, sharp, and straight, often with a reddish tip
• eyes: moderate, bright, and sharp; light-colored iris (gray, green, hazel, or yellowish), sensitive to light
• lips: soft, thin, and pinkish or reddish
• teeth: medium-sized, often yellowish or sharp; gums tender and prone to bleeding
• skin: warm, oily, and sensitive; fair with a coppery or reddish complexion, prone to freckles, moles, acne, and sunburn
• hair: straight, fine, and oily; soft brown, blond, or reddish, prone to premature graying or balding
• nails: pink, flexible, lustrous, and sharp

Pitta’s physiology and behavior:

• digestion and appetite: Tikshna Āgni, very strong and fast digestion that can cause heartburn or acid reflux, they become irritable if they do not eat on time
• sleep: sound but moderate; may wake near midnight or 2 AM with a burst of energy.
• speech: sharp, clear, distinct, and often authoritative or inspiring.
• psychology: when balanced, intelligent, disciplined, and courageous leaders. When imbalanced, prone to anger, irritability, jealousy, judgment, and perfectionism.
• pulse: Manduka moving like a frog jumping, bounding, hot, and forceful, felt best under the middle finger
• dreams: fiery or intellectual, problem-solving, teaching, exams, fire, or violence

Kapha — the principle of structure

Kapha Dosha is the Ayurvedic principle of structure, lubrication , and cohesion that gives the body physical form and stability. It is the “glue” that holds the cells together and supplies the water for all bodily systems and joints. It is primarily composed of the Āpas (water) and Prthivī (earth) elements.

Kapha’s Gunas:

• Guru heavy: heavy bones, muscles, and large body frame, tends to be overweight, grounded, and has deep heavy voice
• Manda slow/dull: slow walk, talk, digestion, and metabolism, overall sluggish gestures
• Hima cool: cool clammy skin, steady appetite and thirst with slow metabolism and digestion, repeated cold, congestion, and cough
• Snigdha oily: oily skin, hair and feces, lubricated, unctuous joints and organs
• Drava liquid: excess salivation, congestion in the chest, sinuses, throat and head
• Shlakshna slimy/smooth: smoothness of the skin and organs, smooth and gentle mind, calm nature
• Sandra dense: dense pad of fat, thick skin, hair, nail and feces, plump rounded organs, firmness and solidity of muscles, compact, condensed tissues
• Mrudu soft: soft pleasing look and skin, and a gentle, caring personality, love, compassion, kindness and forgiveness
• Sthira stable/static: stability and a preference for sedentary activities loves sitting, sleeping and doing nothing
• Picchila sticky: cohesive quality causes compactness, firmness of joints, and organs; loves to hug, is deeply attached in love and relationships
• Āvila cloudy: early morning cloudy mind and fogginess, often desires coffee as a stimulant to start the day
• Kathina hard: firm muscles, strength, rigid attitude
• Sthūla gross: visible structures and the potential for obesity

Kapha’s physical appearance, Ākruti is typically:

• body frame: big, broad, and strong, with a large skeletal structure
• weight: generally heavy; gains weight easily and finds it hard to lose
• face: large, round, and attractive, with a “moon-shaped” look and plump cheeks
• nose: large, wide, and thick; may be short and button-like
• eyes: big, round, and beautiful, with long, thick lashes; iris blue, light gray, or black; very white sclera
• lips: large, full, soft, and oily, often pale
• teeth: large, strong, and white, regularly spaced, with strong gums
• skin: thick, cool, soft, and oily; fair or pale, ages slowly and looks younger than its age
• hair: thick, luxuriant, wavy, and oily; abundant and healthy even in old age
• nails: strong, thick, smooth, and symmetrical, with a polished look

Kapha’s physiology and behavior:

• digestion and appetite: Manda Āgni slow but steady, prolonged digestion, with a feeling of heaviness or fullness
• sleep: deep, sound, and prolonged; falls asleep easily and is hard to wake.
• speech: slow, melodious, and monotonous, with a deep, voluminous voice.
• psychology: when balanced, loving, compassionate, and forgiving. When imbalanced, prone to greed, attachment, possessiveness, and lethargy.
• pulse: Hamsa moving like a swan, slow, deep, and wavy, felt best under the ring finger
• dreams: romantic and watery—lakes, oceans, swimming, snow, or ducks.