The book in the ORNW section suggests using the highest concentration retinol available, and went online to buy some; however, in my online searches I stumbled upon a 1% product called SkinCeuticals Retinol 1.0, which is not mentioned in the book nor in any of the forums here (I did a search). This contains a much higher concentration than the products labeled "Dr. Baumann's Choice", who have a 0.6% retinol concentration.

The question I am facing is: use one of the 0.6% retinol products that are "Dr. Baumann's Choice" products or use the higher 1% SkinCeutical version? Since more concentrated is better, why was the 1% product omitted? Are there any risk/issues with it? ???

(Disclaimer: I have nothing to do with the beauty products industry or L'Oreal/SkinCeuticals, except being a source of revenues for them!)