Cautions, Risks and Liability: If irritation (such as redness, swelling, soreness) of the gums or the mouth occurs, discontinue use and consult a dentist. Products containing peroxides are not recommended for use by children under 12 years of age. Use for periods of longer than 4 days is to be only under the supervision of a dentist. Avoid swallowing the gel or part thereof. Avoid contact of the product with the eyes. Avoid direct contact of the active surface of the tooth whitening product with the gums and/or salivary flow. Do not use if you are pregnant, lactating, or think you may be pregnant.