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मण्डूकपर्ण्याः स्वरसः प्रयोज्यः क्षीरेण यष्टीमधुकस्य चूर्णम् । रसो गुडूच्यास्तु समूलपुष्प्याः कल्कः प्रयोज्यः खलु शङ्खपुष्प्याः ॥ ३० ॥
आयुःप्रदान्यामयनाशनानि बलाग्निवर्णस्वरवर्धनानि । मेध्यानि चैतानि रसायनानि मेध्या विशेषेण च शङ्खपुष्पी ॥ ३१ ॥

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{"source": "Samhita : Charaka Samhita Part 2, Chapter :1, Sthanam :Chikitsasthanam, Shloka Number: 30 to 31", "explanation": "These verses (30-31) detail specific Rasayana formulations using single herbs, emphasizing their benefits.  Let's analyze each component:\n\n**Verse 30: Formulations**\n\nThis verse lists four distinct preparations:\n\n1. **Mandukaparni Swarasa:** Fresh juice of Mandukaparni (Centella asiatica).  This is a potent Medhya Rasayana, known for its neuroprotective and cognitive-enhancing properties.\n2. **Yastimadhu Churna with Milk:** Powder of Yastimadhu (Glycyrrhiza glabra) mixed with milk.  This combination is beneficial for Ojas, promoting strength, immunity, and a healthy complexion.  Milk acts as an Anupana, enhancing the bioavailability of Yastimadhu.\n3. **Guduchi Swarasa (Samoola Pushpa):** Juice of Guduchi (Tinospora cordifolia), including its root and flowers.  Using the whole plant maximizes the therapeutic benefits, addressing a wider range of conditions.  Guduchi is a renowned Rasayana, known for its immunomodulatory, anti-inflammatory, and hepatoprotective properties.\n4. **Shankhapushpi Kalka:** Paste of Shankhapushpi (Convolvulus pluricaulis).  This preparation is specifically highlighted for its Medhya (intellect-promoting) properties, supporting cognitive function, memory, and mental clarity.\n\n**Verse 31: Benefits**\n\nThis verse outlines the shared benefits of these Rasayana formulations:\n\n* **Ayu Pradhan:** Promotes longevity and lifespan.\n* **Amaya Nashan:** Alleviates diseases and strengthens the body's defenses.\n* **Bala Vardhan:** Enhances strength and vitality.\n* **Agni Vardhan:** Improves digestion and metabolic function.\n* **Varna Vardhan:** Promotes a healthy complexion and glow.\n* **Swara Vardhan:** Improves voice quality and clarity.\n* **Medhya:** Enhances intellect, memory, and cognitive function.\n\n**Special Note:** Shankhapushpi is specifically highlighted for its superior Medhya properties, making it a valuable herb for cognitive enhancement.\n\n**Summary Table:**\n\n| Rasayana        | Ingredients                 | Key Benefits                                   |\n|-----------------|-----------------------------|-----------------------------------------------|\n| Mandukaparni   | Fresh juice                  | Cognitive enhancement, neuroprotection        |\n| Yastimadhu      | Powder with milk            | Strength, immunity, complexion                |\n| Guduchi         | Juice (root and flowers)    | Immunity, anti-inflammatory, hepatoprotective |\n| Shankhapushpi  | Paste                       | Cognitive function, memory, mental clarity     |"}
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