Petitgrain ( Citrus aurantium amara ) is extracted from the leaves and young branches of the bitter orange tree — the very same tree that produces Neroli from its flowers and Bitter Orange from its...

Blue Tansy ( Tanacetum annuum ) is one of the most distinctive essential oils in natural cosmetics, and not just for its cobalt blue color. Chamazulene, responsible for this color, is also the...