The SmileSecret bleaching gel is made of 100% natural ingredients. These are as followed: Sodium Bicarbonate, Glycerol, Propylene Glycol, Deionized Water, Sodium Chloride, Xanthan Gum, Aloe Leaf Juice, Carbomer, Menthol, Citric Acid, Pomegranate Seed Extract, Chamomile Flower Extract.