Anti-Ageing Twin Peptide Under-Eye Dark Circle Formula. The skin under the eye is very thin. When blood passes through the large veins close to the surface of the skin it can produce a bluish tint. The more transparent your skin, the darker the circles appear. Dark circles under or around the eyes can be caused by many different factors. Medik 8 Dark Circles contains a unique composition of powerful peptides, antioxidants as well as active lifting & toning ingredients. It is designed to improve the blood haemodynamics & microcirculation, lighten the dark circles & relieve the bags or puffiness. These multi-vector ingredients actively trigger the biosynthesis of hyaluronic acid, collagen & elastin, responsible for firmness & skin tightness. They also help to protect the skin from free-radical damage & collagen breakdown plus counteract excessive water loss by rebuilding the natural “lipid coat” of the skin. Paraben & fragrance free. Unfortunately due to shipping restrictions, we are unable to send this product to customers outside of the EEA.