The product does not seem to contain retinol or any sample. The color is transparent, not yellow at all like retinol. It does not cause any irritation even though it theoretically contains a high amount of active substance. I have been using it almost every night for a month, even though it is summer with high temperatures. At the same time, I also use the retinol from the inkey list. I do not know what other ingredients it has, but indeed the skin becomes smooth and hydrated. The next morning it is velvet.