St. John’s Wort is known as Nature’s anti-depressant. It is often used to treat depression and anxiety. It functions as an SSRI (selective serotonin reuptake inhibitor). This allows more serotonin to stay where it’s needed to keep you feeling less depressed and anxious. This herb is also used to help quit smoking. St. John’s work possesses antiviral properties and can be used externally to treat wounds.
Another well know spice in the kitchen cinnamon is also known for it's medicinal properties. While not really an herb I still think it's important to list it in our list of herbs and their uses. Cinnamon actually comes from the inner bark of a tree in the laurel family. It's been used for centuries and was a hot commodity for trade in ancient times. In fact during the first century A.D. in Rome cinnamon was 15 times more expensive than silver. The Chinese were probably the first to use cinnamon as a medicinal herb and used it to treat fevers, and diarrhea. In more modern times cinnamon has been found to stabilize blood sugar levels in diabetics, as it has an insulin kind of effect.