What is Collagen Volume Needle, COVA? While fillers inject a gel-type substance under the skin to add volume, COVA induces skin regeneration and collagen production to naturally fill volume. You'll feel your skin plumping up on its own over time! Fillers can sometimes clump or migrate after injection, but COVA is absorbed into the skin and spreads evenly, minimizing such concerns. COVA is composed of PDO, a component that naturally dissolves within the human body. When fillers are used on thin skin areas like around the eyes or mouth, they can be noticeable or carry a risk of overcorrection. COVA, however, is more natural and suitable for these delicate areas. Side effects often reported with fillers, such as vascular occlusion or embolism, do not occur with COVA. It's a safer choice! Compared to Juvlook Volume or other collagen injections, COVA offers added physical support, resulting in significantly greater immediate effects.