In anti-ageing 101, retinol is always at the top of the class. This gold-standard active smoothens and refines your skin texture, boosts radiance, and combats ageing. In fact, it can both help prevent wrinkles and work towards eliminating existing ones, too. Pro tip: Let this ingredient be a staple in your night-time skincare routine. Avoid using it during the day unless you’re religiously applying and reapplying sunscreen as it can make your skin more sensitive to UV rays.