These extracts are obtained through extraction from various parts of plants (stems, leaves, flowers, roots, fruit), algae or stones, through maceration in water or a suitable solvent, usually alcohol, glycerine or polyols. More complex processes are sometimes used such as supercritical CO2 extraction, vacuum and microwave extraction, etc. Petroleum or chlorinated solvents are not used.
These extracts are chosen according to the properties of the raw material used. The extract can be purified or filtered, but usually its composition is neither modified nor enriched by any process, unless a minimum content of a particular component is claimed.
These extracts can be subject to various certifications (biological, natural, fair trade, organic, etc.) issued by various organisations (Natrue, Cosmos, Ecocert, BDIH, etc.).