While other suppliers may offer different grades of Essential Oils that may be diluted or cut with carrier oils, at Essentials by Catalina we only offer concentrated, pure and undiluted Cosmetic Grade Essential Oils. Working with concentrated Essential Oils such as these reduces the need for high fragrance loads. A little goes a long way. For recommended fragrance loads please see the "Customization" tabs or consult the fragrance or essential oils IFRA document. Please note that while these benefits are commonly associated with these essential oils, individual experiences may vary. It's important to use essential oils safely and consult with a qualified healthcare professional if you have any specific concerns or medical conditions.