Essential oils are the subtle, aromatic and volatile liquids extracted from the flowers, seeds, leaves, stems, bark and roots of herbs, bushes, shrubs and trees, through distillation. Sandalwood has been researched in Europe for its ability to oxygenate a part of the brain known as the pineal gland, the seat of our emotions. The pineal gland is responsible for releasing melatonin, a powerful hormone that enhances deep sleep. Sandalwood is similar to Frankincense oil in its support of nerves and circulation.