At-home teeth whitening kits work due to the presence of active ingredients like hydrogen peroxide or carbamide peroxide. These chemicals penetrate the enamel and break down stains, effectively lightening the color of the teeth. Additionally, most kits come with trays or strips that ensure even application of the whitening solution onto the teeth, maximising its effectiveness. While professional dental procedures may offer faster results, at-home kits provide a convenient and cost-effective alternative for gradual whitening with regular use. Smilie is the best example of at at-home kit that provides fast effective results, from the comfort of your own home.