Carene is a terpene found in the cannabis plant and other plants such as pines, cedars, lemons, basil, and rosemary. It has a sweet, earthy aroma of pine and citrus and is often used in cosmetic products and for food flavorings. Carene may be the terpene most responsible for eye redness and dry mouth that often comes from cannabis use. Carene has been shown to provide anti-inflammatory effects and is also believed to promote alertness and memory retention.