8 truths about toothpaste

Nowadays, there are many kinds of toothpaste in supermarkets with complete functions. Faced with toothpaste with various functions, consumers do not know how to choose. Does toothpaste have a shelf life? Do you need to change toothpaste frequently? Why is the whitening toothpaste not effective? The following is an answer

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Can CFLs really cause cancer?

In 2000, energy-saving lamps quickly entered thousands of households in China with their advantages of low power consumption and long service life. By 2009, the penetration rate had reached 90%. Is the energy-saving lamp so widely used really the culprit of cancer lurking around people? ultraviolet radiation is the main

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