Triticum Vulgare (Wheatgerm) Oil. Origin: Australia / Grain. A carrier oil is usually a plant-based oil extracted from a nut or a seed used to moisturize and heal the skin.  It can be used alone or in combination with other oils to find just the right formula for your skin type. A carrier oil is used to dilute essential oils and absolutes before they are applied to the skin in massage and aromatherapy. They ‘carry’ the essential oil onto the skin. Diluting essential oils is a critical safety practice as essential oils are potent and can cause irritation when directly applied to the skin.