Birch, Betula lenta (1200). This sweet, woody-scented oil comes from the bark of the Yellow Birch which grows in North America. It is best known for its effectiveness in supporting pain relief in sore muscles, joints, tendons, and sprains. Athletes value its warming, anti-inflammatory properties when used in a massage oil or lotion blend. Birch contains the phytochemical methyl salicylate which is well-established as a pain-reliever. This is a pure therapeutic-quality aromatherapy essential oil produced using wild-crafted plants and traditional methods from Russia, and is obtained from the bark of the tree.