Herbal decoctions or powdered herbs are cooked with Jaggery or Honey to create a herbal jam or preserve known as Ayurvedic Rasayanas or Lehyams. Rasayanas (rejuvenative substances) are a type of ayurveda product which are designed to enhance health and ojas, produce top-quality bodily tissues, eliminate senility and other diseases of old age, lengthen life and enhance memory, intelligence, youth, lustre, sweetness of voice, strength of body and senses, and beauty by stimulating immune and metabolic functions.