Our bodies and nature provide healing treatments for a host of ailments, including depressed mood, anxiety, and imbalances in energy. Herbal healing is one of the oldest forms of self-treatment dating back 5000 years. Medicines, remedies, and supplements are derived from foods, herbs, plants, amino acids and other proteins in the body. Omega-3 is a fatty acid found in cold-water fish and other food sources. St. John’s wort (a plant) and SAMe (an amino acid) are two other natural remedies for depression.