Dr. Geusens herself is a fan of retinol which is a derivative of vitamin A as it has been supported by studies to have an anti-ageing effect on the skin. However, Nomige does not include vitamin A as it is effective for any skin type, which does not fit the personalised concept of Nomige. Also, it is not always well-tolerated by everybody (sensitive skin, pregnant women, etc.).
You can easily combine it with Nomige products. Just add it in the last step of your evening ritual, after applying the night serum.