Some individuals may experience temporary tooth sensitivity or gum irritation when using HP teeth whitening strips. These side effects are usually mild and subside after discontinuing use. If you experience any persistent or severe side effects, it is important to consult with a dental professional.

When choosing a teeth whitening product, it is important to read the product labels, check for certifications (such as halal, vegan, or cruelty-free), and research the brand's reputation. Additionally, consulting with a dental professional can provide further guidance and assurance of safety.

Traditional whitening strips use a peroxide-based formula which can trigger tooth sensitivity. Smilekit and Glory Smile PAP+ Strips instead utilize a sensitivity-free PAP-based formula.

The time it takes to see results with teeth whitening products can vary depending on the product and individual factors. Generally, noticeable results can be seen within a few days to a few weeks of consistent use.