While the delivery took a very long time (3 months),the product itself is perfect. The seller is also very attentive to the customer.

To conduct a test to determine effectiveness?

This is a great product; it quickly dries out blemishes, softens the skin, and effectively minimizes pores. It works well for oily skin. I've used it before, so I recommend it. However, delivery takes a long time, and there's no communication from the seller.

The product's effectiveness in preventing pimples was temporary, but it did offer some assistance. I appreciate it.