Kiehl’s Eye Fuel is a men’s eye cream that is said to visibly reduce the appearance of dark circles and puffy eyes. It is a lightweight formula that provides weightless hydration for cooling, refreshing relief. One of the key active ingredients in Kiehl’s Eye Fuel is caffeine. As a natural stimulant, caffeine causes vasoconstriction (constriction of the blood vessels) when applied to the skin. This function aids in reducing the amount of blood that accumulates under the eyes, which is a major factor that contributes to dark circles. Additionally, vasoconstriction can firm the skin due to the removal of excess fluids and possible stimulation of the lymphatic drainage system.
Kiehl’s Eye Fuel is also infused with niacinamide, a form of vitamin B3 that is known to help brighten skin. Niacinamide has a small molecular weight, which allows it to easily penetrate the skin’s surface. After being absorbed, niacinamide exerts antioxidant, anti-inflammatory, and anti-aging effects, as well as improves the skin barrier function. In addition to these active ingredients, Kiehl’s Eye Fuel also contains several silicones, such as dimethicone and PEG-10 dimethicone. Silicones allow this eye cream to spread easily across the skin’s surface and also impart a light, silky feel to the skin.