Can I use Ultra Retinol at the same time as Siero #Perfect ? 05 September 2024 09:40 Updated No. Ultra Retinol should not be used at the same time as #perfect serum. You can use Siero #Perfect at a different time such as in the morning, if you wish. Related articles Can I use Ultra Retinol on my neck or décolleté? My dermatologist prescribed isotretinoin, are they the same thing? Is there a minimum recommended age for starting to use Ultra Retinol? Can I use Ultra Retinol at the same time as Refresh Your Skin peel? Can I use Ultra Retinol at the same time as Luce Liquida?