Adding in collagen fragment peptides, like GHK, might trick the skin into thinking that collagen has broken down and it's time to create some more. If you are not already using a Retinoid in your routine, it is best to start slowly and apply the Retinoid product only a few times per week.

My skin felt comfortable each time and once I got my head around not flooding my skin with my usual night products, the lack of quenchy comfort didn’t matter anymore: I was on a one-way retinol train and I wasn’t going back. No7’s retinol collection are the first products that make adding retinol to my daily skin-care regimen seem like an attainable, consistent change that feels good and provides results — and that’s worth more than anything. It often comes to the formula as part of an emulsifier, thickener trio (with Polyacrylamide and Laureth-7). Although we cannot stop aging, there are ingredients that have been shown to slow the process: retinoids, antioxidants, and some peptides.With the wildly popular results of the brand’s Night Concentrate (83% of women surveyed saw a reduced appearance of wrinkles, according to the brand), No7 is now expanding its line of retinol products with Pure Retinol Night Cream and Pure Retinol Eye Cream. These benefits include boosting collagen production, fighting inflammation, and reversing UV damage. A polymeric (big molecule from repeated subunits) emulsifier that comes from Inulin, a naturally occurring polysaccharide found in the roots and rhizomes of several plants. It usually has to be neutralized with a base (such as sodium hydroxide) for the thickening to occur and it creates viscous, clear gels that also feel nice and non-tacky on the skin.

A soothing dipeptide (tyrosine + arginine) based molecule that functions as a "messenger of tranquility and muscle relaxation".This is a brand I really trust: they run thorough clinical trials and are at the forefront of formula technology.