Squalane also works as a great penetrating agent to control or moderate the strength of strong products.
Apply a light amount of Squalane after applying copper peptides to increase efficacy and make the cream/serum stronger. As it tries to go into the skin, when applied on top it will help push down more of the copper-peptides, thus making it stronger.
Apply a light amount of Squalane before applying copper-peptides to make the cream/serum milder. Basing the skin first with a light amount of Squalane will serve to slow down the penetration rate of the copper-peptide cream, thus making it milder.