Colgate Optic White Renewal Lasting Fresh Whitening toothpaste is formulated with 3% hydrogen peroxide, which effectively removes 10 years of yellow stains from teeth with twice-daily brushing for 4 weeks. It's designed to provide deep whitening beyond surface stains, helping to rejuvenate and brighten your smile. Key Features: Hydrogen peroxide formula: Contains 3% hydrogen peroxide, a whitening ingredient used by dentists, to remove yellow stains effectively. Deep whitening action: Proven to deeply whiten beyond surface stains, providing noticeable results. Enamel safe: Safe for daily use without causing harm to tooth enamel. Colgate Optic White Renewal Toothpaste in Lasting Fresh flavor aims to deliver significant whitening results while offering a lasting fresh sensation after brushing. As with any whitening toothpaste, it's important to use as directed and in moderation to avoid potential sensitivity issues. Additionally, for optimal oral health, it's recommended to brush twice daily, floss regularly, and visit the dentist for check-ups.