Constituents are individual parts of a whole. Caffeine is a chemical constituent in coffee, for instance. Each essential oil is packed full of diverse constituents that lend different fragrances and therapeutic benefits to the whole. If you’re looking for an oil that can help you relax before bed, for example, you might want one that has a high level of the constituent Linalool (Thyme, Basil, Lavindin, etc. ). Our GC/MS reports show all of the constituents (above 1%) provided by our essential oils.