Is the composition of SK-II safe? Is its patented ingredient harmful to the skin?

It contains yeast ingredients to help skin metabolism. I was scared before I used it. I looked up a lot of information, but it has a good reputation. This kind of high-grade cosmetics is afraid of dependence. I use it three times a week to help the skin metabolism and make it easier for the skin to absorb other skin care products. Dare not use it every day. I suggest you do the same.