There are no set rules for when we should start using a night cream (or serum), but for everyone there comes a time when we gaze in the mirror and realise our skin needs a little bit of extra help! That time could be at 30 or older, but if you have dry skin it could happen a few years earlier. Some people think night creams are just the beauty industry's way of separating you from more of your money, but the truth is that day and night creams provide different skin benefits.
A night cream's purpose is to replenish lost moisture and to treat the skin with enriching ingredients while it is clean of grime and pollutants. While the skin is rested and warm, the pores relax, allowing for better absorption. Why? You may have heard about circadian rhythm which refers to the body’s endogenous 24-hour physiologic, metabolic, and behavioural rhythms. It has been demonstrated that every cell in our bodies contains clock genes and skin cells express these circadian proteins. Our skin therefore follows a daily rhythm and changes its functionality dependent on what time of day it is.
During the day the skin’s primary objective is to protect itself, with thickness being at a maximum and cell proliferation at its lowest. At night the skin is focused on repair, with cell proliferation, barrier permeability, blood flow and penetration being at their highest levels. So it appears that at night the skin would be the most receptive to a formulation which carries high levels of active ingredients.