So how do we know what herbs can do? When learning about plants, it is important to realize there is no one way of knowing. There are historical records of plant use going back thousands of years. Many modern-day herbalists use herbs in their lives and in their practices and share their personal experiences. There’s also a growing number of scientific studies on plants. Herbs support natural energy, provide essential nutrients, promote healthy aging, aid in the repair of vital processes, and strengthen healthy bodily functions.