As a large e-commerce platform, Alibaba has many sellers selling various products, including cosmetics. However, Alibaba cannot guarantee that all sellers are genuine because Alibaba cannot directly supervise the behavior of all merchants.

Therefore, when purchasing cosmetics, it is recommended that you choose other reliable sales channels, such as regular cosmetics retailers or official channels to ensure that you purchase genuine products. At the same time, you should also pay attention to the following points:

1. Check the merchant's reputation evaluation and choose a reputable merchant.

2. Check the ingredient list of the product and choose cosmetics without additives or harmful substances.

3. Pay attention to the production date and shelf life of the product, and choose products within the shelf life.

4. If possible, choose official channels to purchase to ensure that you purchase genuine products.