Caffeine, commonly found in coffee and tea, has made its way into Korean skincare due to its ability to invigorate and refresh the skin. Known for its antioxidant and anti-inflammatory properties, caffeine is a popular ingredient for reducing puffiness and brightening tired skin.

Benefits of Caffeine: Best known for its ability to constrict blood vessels, which helps to reduce puffiness, especially around the eye area. It also stimulates circulation, giving the skin a more energized and awake appearance. Additionally, caffeine is packed with antioxidants, which protect the skin from free radicals and environmental stressors, helping to slow down the signs of aging like fine lines and wrinkles. Its anti-inflammatory properties can soothe redness and irritation, making it a great addition to any skincare routine.

Ingredients That Work Well with Caffeine: Pairs well with ingredients like hyaluronic acid, peptides, and green tea. These combinations enhance its depuffing and energizing effects while hydrating and protecting the skin. Caffeine also works well with vitamin C to brighten the skin and reduce dark circles.

Ingredients to Avoid Mixing with Caffeine: While caffeine is compatible with most skincare ingredients, it’s best to avoid using it alongside strong acids like AHAs or BHAs in the same routine, especially if you have sensitive skin. These can potentially cause irritation when mixed with caffeine’s stimulating effects, so it's better to alternate their use for maximum skin benefits.