Cut Herbs, Capsules and Powders
Since the beginning of time man has been using plant root's bark, leaves, and flowers to help treat a variety of ailments and disorders. Although herbal remedies cannot specify that they have been put through clinical tests like their pharmacuetical counterparts. I feel that usage over many thousand years by civilisations as diverse as the Chinese, Incas, American Indians, Greeks, and Egyptians to name a few would give credulance to their effectiveness.