Those types of claims are often made about a lot of the traditional knowledges - certainly about TCM (Traditional Chinese Medicine) and many types of folk herbalisms and shamanisms.<quoted text>
Ayurveda, the ancient Vedic science of longevity, was a perfect science in those days that was devised by the yogis who'd simply enter trance and discover everything there was to be known about a disease and their knowledge of anatomy, psychology, root causes of diseases and cures far exceeded the superficial knowledge of the same that modern allopathic doctors possess. In that trance state they'd also discover the most efficacious cures and instruct their disciples to prepare the same giving out complete details about the standards of purity, ecological impact, method of storage, dosage and the like. They also knew of certain rare Himalayan herbs like the Sanjeevani that could, by acting on the most materialized aspect of the life-force infused in matter which confers life on the organism, stave off death or ressurect a dead person for a definite amount of time.
According to the old reports, they'd also perfected the art of invasive surgery on brain, heart, stomach and the like and every ayurvedic physician of those days had to essentially possess a certain degree of the psychic vision so as to actually "see" the force fields and organs of the patient in order to give a perfect diagnosis and to know how to scission and stitch at which point.
Much of the perfected knowledge of that ancience has been lost or tampered with and what passes off as ayurveda these days is a pale version or imitation of the original.
I wonder though that "back in the age", they were still making that claim, to cover up for inefficiencies.