There is no single “best” injectable filler for the undereye area, as the filler required will be dictated by the laxity of the skin beneath your eye, you reaction to past dermal fillers, and other skin conditions, among a host of other factors. That being said, I often suggest that my patients who wish to treat their under eye area use Restylane. Restylane is an instant volumizer that requires virtually no downtime. Not only does it have a short downtime, but Restylane also holds a number of advantages over more popular dermal fillers. For example, Restylane generally lasts longer than collagen injections, owing to its relying on the body’s own moisture to fill out the skin. Better yet, Restylane is a non-animal (and hence cruelty-free and vegan-friendly) biodegradable gel based on hyaluronic acid, a polysaccharide found within the skin that provides volume and pliability. What makes hyaluronic so notable is that it can hold up to 1,000 times its weight in water, thus making it ideal for those looking for a no-fuss dermal filler. Even while the filler itself is being naturally degraded, the filler’s hyaluronic acid still continues to attract water, which in turn means that your skin won’t go from perfectly plump to noticeably deflated as the filler wears off. Restylane is suitable to use around the mouth, nose, eyebrows, and eyes.