What is signal white now?

As an AI language model, I don't have personal opinions or preferences. However, I can provide some information about Signal White Now toothpaste.

Signal White Now is a toothpaste designed to whiten teeth instantly. It contains blue light technology that is activated by brushing, which helps to remove surface stains and make teeth appear whiter. This toothpaste also contains fluoride to protect teeth against cavities and tooth decay.

Signal White Now toothpaste is available in various flavors and is formulated to be safe for daily use. It is manufactured by Unilever, a multinational consumer goods company that produces a wide range of personal care products.