Essential oils are pure, high-quality plant essences from flowers, leaves, fruits, woods, resins or roots. They should be used consciously and carefully and only applied in diluted form when used externally. Essential oils are highly flammable by nature and should therefore always be stored in a safe place that is inaccessible for children. Avoid direct contact with eyes and mucous membranes. If stored in a cool place protected from light, most essential oils will keep for at least three years. However, we recommend using up citrus oils (such as orange) within 18 months. Before applying essential oils to the skin, first carry out an allergy test: dilute 1 drop with a little body oil and apply to the crook of the elbow, then wait 12 hours to see if skin irritation occurs. Special precautions are required for pregnant women, babies, the elderly and epileptics. Consult the specialist literature.