First of all, you can ask the ingredients of these masks clearly, then check the function of these ingredients on the Internet, and then judge whether the masks have freckle removing effect. Don't buy blindly. It is possible that the seller says that these products are particularly good, but they don't have that effect. If so, it is a waste of money. Many merchants use the fact that consumers can't find the ingredients and say how good their products are, which is also an act of deceiving consumers. So when you buy a product, especially an expensive one, you must first check whether the ingredients in it are true.
Secondly, you can also take screenshots of these masks and ask some experts, because experts have rich experience and professional knowledge in these areas, and they know how to judge. Don't buy it when your brain is hot. After all, the money for buying masks is not small. Some masks are really expensive. A mask costs more than 100. Buy 10/000. Therefore, everyone must be careful when buying, and don't be deceived by merchants.
Third, try if you really want to use it, you can buy one or two pieces to try the effect first. If the effect is particularly good, then continue to buy, so that it will not cause waste. Or recommend a friend to use a mask and listen to others' feelings. It might be better if several people discuss it together.