I am not making a statement about which product is "the best". I am a person who has seen a few people get a new car or even new house that they could not have gotten for themselves. I also have seen people who had never had good skin in their entire lives, and had very dark, blemished skin. So I am giving you a general overview of how some of the products that are being sold do.
If you are new to cosmetic treatments, then I would strongly recommend that you do some research and look around the internet. Most of these products are made by a number of companies. There are several types of skin care products that you should be aware of. Some of these products have an active ingredient that could potentially be harmful for your skin. However, all of them have some ingredient that is safe to use on your skin and will not make you dark, blemished, or anything like that. So, I have tried to list some of the common ones here. If you are not already familiar with what the ingredients are and what they do on your skin, I suggest you visit this link. I will also give you an explanation about the ingredients in these products.