How does SUNEKOS change your skin? Differences from volume-adding injections and the limits of the evidence

SUNEKOS is an injection combining non-cross-linked hyaluronic acid with amino acids, used to improve skin hydration and firmness. In the same category of injections, research shows increased skin moisture content after repeated treatments, but it is not a volume-adding treatment like cross-linked hyaluronic acid[1][2]. Clinical research specifically investigating SUNEKOS itself was not found in this review.

What does SUNEKOS change, and what does it not?

What it can do is improve skin "quality" — hydration, texture, and firmness[1][3]. It is not suited for purposes that involve changing shape, such as filling deep under-eye hollows or lifting nasolabial folds with fuller volume[2].

When hyaluronic acid undergoes cross-linking (a hardening process), it becomes more resistant to breakdown in the body and maintains its shape longer.[2]Non-cross-linked hyaluronic acid has weaker shape-forming properties, so it is used in treatments where it is spread thinly throughout the skin.[1][2].

How does this differ from cross-linked hyaluronic acid injection?

The main difference is purpose and duration. Cross-linked hyaluronic acid is used to add volume to hollows and wrinkles, while non-cross-linked hyaluronic acid is used to improve skin hydration and firmness.[1].

Non-cross-linked hyaluronic acid is thought to work on skin fibroblasts (cells that produce collagen) and help promote the production of collagen and elastin.[1]However, this is mainly an explanation of the mechanism, and how much the appearance changes varies from person to person.

What changes were observed in research?

In a study where non-cross-linked hyaluronic acid was injected three times at three-week intervals, 24 participants showed increased skin moisture, and improvements in skin texture and complexion were reported.[1]No major side effects were observed.[1].

A review of 13 studies on hyaluronic acid injection also reported improvements in skin hydration, firmness, radiance, and texture.[3]In this review, hyaluronic acid formulations alone showed more distinct changes than formulations mixed with other ingredients.[3].

The skin around the eyes is thin and fine lines tend to appear in this area.[4]Reports indicate that injections of non-cross-linked hyaluronic acid improve skin brightness and texture around the eyes.[4].

How much can be claimed based on the evidence?

The research introduced here examined injections of the same class, not SUNEKOS itself.[1][3]We could not confirm in this review how much additional benefit comes from combining amino acids.

The 24-person study is also a small-sample study with no comparison group.[1]The researchers themselves state that longer-term follow-up studies are needed.[1].

How do we prepare for side effects and risks?

Since it is an injection, bruising and swelling at the needle site can occur. The guidelines of Japan's society of aesthetic surgery state that hyaluronic acid injection is effective, but caution is necessary because serious complications such as skin necrosis and vision loss have been reported when the substance enters blood vessels.[5].

A advantage of hyaluronic acid used around the eyes is that it can be dissolved by degrading enzymes.[6]When injecting near the eyes, it is reassuring to ask which layer the injection targets, how it will be administered, and how complications will be managed.

What should I confirm during consultation before treatment?

SUNEKOS suits people more concerned with skin hydration and texture than facial contours.[1][3]If hollowing or sagging (skin laxity) is the main concern, another treatment may be more appropriate.[2].

During consultation, confirm whether your concern is "skin quality" or "facial structure," how often you would need to come, and how you would feel if no change appears.