Synergy, It's an Essential Oil Thing: Revealing the Science of Essential Oil Synergy with Cells, Genes, and Human Health: Amazon.co.uk: Johnson, Dr. Scott A., Plant, Dr. Joshua J.: 9780996413923: Books
Edens Garden Spring Shine Limited Edition Spring Essential Oil Synergy Blend, 100% Pure Therapeutic Grade (Undiluted Natural/Homeopathic Aromatherapy, Edens Garden Essential Oil - valleyresorts.co.uk