The vast amount of Chinese herbal knowledge available today has accumulated in writing for thousands of years. That means today’s herbalist draws on ancient herbal formulas that have been getting sick people well for a very long time. Those formulas work as well in America today as they did in China ages ago.
Even so, today’s herbalist often adjusts a traditional formula, the adjustment based on new knowledge and experience in similar cases. From the patient’s viewpoint, that’s getting the best of two worlds, the ancient and the modem.