Not all gels are created equal. The effectiveness of a gel depends on its concentration, quality and most importantly, the freshness of the gel. Lumiere is manufactured in Canada, where quality control is documented and controlled. We do not make large batches, but rather synthesize Lumiere to order. The Lumiere gel with its exceptional quality will produce the highest and most effective whitening available worldwide. With Lumiere, you control the frequency and level of whitening.