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===== ''Medhya Rasayana'' =====

===== ''Medhya Rasayana'' =====

These four Rasayana enhance intelligence. Yashtimadhu is sheeta, pacifies vata-pitta and maintains normal kapha. It controls rajoguna and increases sattva, resulting in boosting intelligence. Yashtimadhu also nourishes dhatus and ultimately increases shukra and oja. As explained by commentator Chakrapani, effects on Indriya, mana and buddhi are mediated through oja. Mandukaparni is sheeta and it specially pacifies pitta. It also controls rajoguna and increases sattva. Shankhapushpi is slightly ushna, specially pacifies vata. Shankhapushpi also controls rajoguna and increases sattva. Shankhapushpi nourishes majja. Whereas guduchi is also slightly ushna, pacifies all three doshas, controls tama and increases sattva. Keeping in mind such peculiarities, specific rasayana is chosen for a specific person. Many researches have been conducted on these medhya rasayana.(Ray and Ray, 2015)  

These four ''rasayana'' enhance intelligence. ''Yashtimadhu'' is ''sheeta'', pacifies ''vata-pitta'' and maintains normal ''kapha''. It controls ''rajoguna'' and increases ''sattva'', resulting in boosting intelligence. ''Yashtimadhu'' also nourishes ''dhatus'' and ultimately increases ''shukra'' and ''oja''. As explained by commentator Chakrapani, effects on ''indriya, mana'' and ''buddhi'' are mediated through ''oja''. ''Mandukaparni'' is ''sheeta'' and it specially pacifies ''pitta''. It also controls ''rajoguna'' and increases ''sattva''. ''Shankhapushpi'' is slightly ''ushna'', specially pacifies ''vata''. ''Shankhapushpi'' also controls ''rajoguna'' and increases ''sattva''. ''Shankhapushpi'' nourishes ''majja''. Whereas ''guduchi'' is also slightly ''ushna'', pacifies all three ''doshas'', controls tama and increases ''sattva''. Keeping in mind such peculiarities, specific ''rasayana'' is chosen for a specific person. Many researches have been conducted on these ''medhya rasayana''.(Ray and Ray, 2015)

===== Triphala Rasayana =====

===== Triphala Rasayana =====