Benefits Of Healthvit Melissa Oil comes from plants just before first flowers appear as aroma is less interesting when plant is in full bloom. The oil is steam distilled from melissa leaves & tops and is pale yellow in color with agreeable & subtle, warm, lemony aroma. Rare oil, it is very expensive as 7 tonnes of leaves and tops are needed to produce 1 kg (21/4 lb) of oil. Having therapeutic properties, it is used for nerve calming applications. It is also a good sedative and has anti-viral, anti-inflammatory, anti-spasmodic, stomachic and choleretic properties.