Janina Ultra White Maxiwhite Professional Teeth Whitening Pre-Filled Trays 5 Days System allow you to easily whiten your teeth at home without harsh ingredients or abrasives. The one-size-fits-all and ready-to-use trays are designed to whiten both front and back of teeth and are soft and flexible for comfortable use. The active ingredient is Sodium Percarbonate, which when in contact with saliva forms a teeth whitening action. In a clinical test with 24 volunteers with yellow teeth, teeth were on average up to 3.6 shades whiter after just one application. After 5 days (1 application per day), the total whitening effect will be a minimum of 7 shades.
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