The 17 Most Misunderstood Facts About the ordinary retinol
https://www.openlearning.com/u/avelina-qhha5l/blog/11WaysToCompletelyRuinYourTheOrdinary/
This comes in a greater percentage because it has been mixed with vitamin F, a fat that works as a buffer, meaning you can brighten the skin without the prickling. If coloring is your concern then this serum is