This dentist-approved Smile Science Harley Street Professional Teeth Whitening Pen will help you achieve up to 8 shades whiter teeth from the comfort of your own home. Containing whitening gel developed for sensitive teeth, this enamel-friendly formula nourishes and strengthens your teeth whilst giving you a bright, dazzling smile. Not recommended for use whilst pregnant or breastfeeding. Suitable for 16+ years of age. Ingredients Glycerin, Aqua, Mentha Piperita Oil, Carbomer, Triethanolamine, Mica, Sodium Carbonate Peroxide, Sucralose, Linalool, D-Limonene