Both carrier and essential oils are critical to successfully dealing with a head lice infestation. Carrier oils are typically cold-pressed oils that are produced from the fatty portions of a specific plant and are used to suffocate and immobilise the lice. Contained within the carrier oils are the essential oils known to possess ovicidal, repellent and insecticidal activities and used safely are a natural alternative in helping to eradicate lice and eggs. Holistic Hair use lavender, tea tree, citronella and pink grapefruit as our chosen essential oils.