title: Shelf-life evaluation of Rasayana Churna: A preliminary study.
abstract: BACKGROUND
  Concept of Saviryta Avadhi (shelf-life) of Ayurvedic dosage forms is well-defined in classics of Ayurveda. Information on this is scattered in initial classics of Ayurveda like Charaka Samhita, but focused well after 13(th) Century AD in texts such as Vangasena Samhita, Sharangadhara Samhita and Yogaratnakara. Though the concepts have a strong background; considering the pharmaceutical development, a need is felt to re-evaluate the age old concepts by following current norms.
  
  
  OBJECTIVE
  To evaluate shelf-life of two samples of Rasayana Churna.
  
  
  METHODS
  Raw material was procured from The Pharmacy, Gujarat Ayurved University and authenticated at Pharmacognosy Laboratory. Individual drugs were powdered and blended in specified ratio to obtain Rasayana Churna (RC). RC was levigated with decoction of Amalaki, Guduchi and Gokshura to prepare Bhavita Rasayana Churna (BRC). Both the samples were subjected to accelerated stability studies by following standard guidelines.
  
  
  RESULTS
  Both the samples are bitter and astringent with characteristic odor. RC is creamish brown in colour, while BRC is dark blackish brown. These Organoleptic characters were unchanged till the 6(th) month of study. On comparision, BRC is found to be more stable than RC.
  
  
  CONCLUSIONS
  This signifies that, Bhavana not only incorporates additional therapeutic attributes, but also helpful in increasing shelf-life.
authors.affiliation: Om Ayuh: Ayurved and Panchkarma Chikitsalya, Bhavnagar, India.
authors.forename: Priyanka
authors.initials: P
authors.lastname: Verma
authors.affiliation: Department of Rasa Shastra and Bhaishajya Kalpana, Institute for Post Graduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar, Gujarat, India.
authors.lastname: Galib
authors.affiliation: Department of Rasa Shastra and Bhaishajya Kalpana, Institute for Post Graduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar, Gujarat, India.
authors.forename: Biswajyoti
authors.initials: B
authors.lastname: Patgiri
authors.affiliation: Department of Rasa Shastra and Bhaishajya Kalpana, Institute for Post Graduate Teaching and Research in Ayurveda, Gujarat Ayurved University, Jamnagar, Gujarat, India.
authors.forename: Pradeep Kumar
authors.initials: PK
authors.lastname: Prajapati
keywords: Accelerated stability; Bhavana; Churna; Rasayana; Saviryta Avadhi; shelf-life