While everyone wants a beautiful smile with clean white teeth, some clients do not respond well to whitening products, and others should avoid using the products. Patients with the following issues may not respond well or should not use teeth whitening products: ᐅ Pregnant or lactating women since long-term impacts are unknown ᐅ Clients with implants, crowns, fillings, or dental bridges ᐅ Adolescents under the age of 16 ᐅ Clients with exposed roots, tooth decay, cavities, or periodontal disease ᐅ Anyone with an allergy to peroxide or bleaching agents ᐅ Consumers with sensitive teeth ᐅ Those looking for unrealistic results, such as blinding white results