How to evaluate the essence of Estee Lauder's little brown bottle?

Estee Lauder's small brown bottle has a wide range of applications. Generally, you buy the essence as soon as you contact it, because the overall balance is good and the possibility of allergic stimulation is not high. Just like most people who have money will buy some Mercedes-Benz BMWs of Volkswagen series, it's not that they are excellent, but that they really won't make big mistakes. Their function is mainly to provide a series of functions at the right time. For example, protein, who secretes skin protection during the day, starts the rhythm of skin repair at night, which can be regarded as an unknown fighter. Many experiments have proved that if the related rhythm genes are removed, there will be big problems in cell repair and the life span will be shortened.