Hyssop Decumbens essential oil is steam distilled from the leaves and flowers of a perennial that grows in France, Spain and southern Europe. The flowers and leaves have been used since antiquity for their therapeutic properties. The oil has a warm, sweet, penetrating aroma that enhances alertness and mental clarity. Hyssop has a regulatory effect on the circulation. It is used to treat the skin and is beneficial for all respiratory conditions. Hyssop Decumbens essential oil is produced from a subspecies of Hyssop Officinalis and is milder due to being free of the ketones contained in the latter. It has potent antiviral effects.