Rejuran vs. Fillers:
Two Different Goals, Not Competing Options

What Each Treatment
Is Actually Built to Do

Rejuran works by introducing polynucleotides into the dermis to encourage the skin’s own repair and collagen production, a process our Rejuran Healer overview covers in more depth. Fillers, most commonly hyaluronic acid based, work through an entirely different mechanism: they physically occupy space beneath the skin to restore lost volume or add definition. Neither approach is a better version of the other; they’re built for different jobs.

Rejuran vs. Fillers
Side by Side

The table below lines up the two approaches across the factors that actually matter for choosing between them.

Which One
(or Both) Fits Your Goal

If your main concern is overall skin quality, texture, or mild scarring, Rejuran addresses that more directly. If the concern is a hollow, a fold or lost volume with a defined shape, that is structural, and no amount of collagen stimulation fills it. The two are also routinely combined, treating structure and surface as separate problems in the same face. The published comparison below ends up recommending the same thing.

People often search whether Rejuran is a filler. It is not. Rejuran is a polynucleotide injectable, usually described as a skin booster, placed in the dermis in small amounts to work on skin quality. It does not hold a shape or lift a hollow the way a hyaluronic acid filler does.

For a specific branded comparison, see our Rejuran vs Juvederm guide, which looks at one particular filler product in more detail.

What the Comparison
Looks Like in the Literature

The distinction above is not merely a framing device. A 2026 review in the Journal of Clinical Medicine set hyaluronic acid fillers against polynucleotides specifically in the under-eye area, and the split it describes is the same one: different jobs, measured on different scales.

Hyaluronic acid came out ahead on immediate structural correction and contour restoration, with early response rates often reported above 80 to 90% and effect typically lasting somewhere between six and eighteen months. Polynucleotides came out ahead on skin elasticity, hydration, surface texture and wrinkle depth, changes that are measured with instruments rather than judged from a contour photograph, and that build over four to six weeks rather than appearing on the day.

The risk profiles differ too, which rarely makes it into a side-by-side table. For hyaluronic acid the review notes Tyndall effect, rare vascular occlusion, and malar oedema reported in 11 to 31% of patients at long-term follow-up. For polynucleotides the reported events were mainly mild, transient injection-site reactions with no serious events. That is not an argument that one is safe and the other is not. The failure modes are different, and they are not equally serious: vascular occlusion from filler is rare, but when it happens it can damage skin or, very rarely, sight, which is why injector experience and emergency preparation matter so much more on the filler side.

The review’s own recommendation is the least surprising and most useful part: hyaluronic acid where there is genuine volume loss, polynucleotides where the problem is dermal quality or the skin is thin and prone to oedema, and both together where the face has structural and textural issues at once. That last option is a real one, and it is worth raising at consultation rather than treating the choice as either-or.

Frequently Asked
Questions

Can Rejuran and fillers be used in the same appointment?

Sometimes, but not automatically. Whether both can be done on the same day, on which areas and in what order is the practitioner’s decision, and some prefer to separate them. Our guide to combining Rejuran with other treatments covers the usual considerations.

Which treatment is better for under-eye hollows?

Under-eye hollows are usually a volume concern, which typically responds better to a carefully placed filler than to Rejuran alone.

Does Rejuran ever replace the need for filler?

Not for volume-specific concerns; Rejuran improves skin quality but doesn’t add the structural volume that filler is designed to provide.

Which has a longer track record, Rejuran or fillers?

Hyaluronic acid fillers have a longer established history in aesthetic medicine, though polynucleotide treatments like Rejuran have grown significantly in clinical use over recent years.

Is one treatment safer than the other?

Their risks are different, not equal. Rejuran’s reported side effects are mostly short-lived redness, swelling and bruising at the injection points. Hyaluronic acid filler carries a rare but serious risk: filler blocking or compressing a blood vessel (vascular occlusion), which can lead to skin necrosis or, very rarely, vision loss. Ask who will inject, how much experience they have in that area, and whether hyaluronidase, the enzyme used to dissolve HA filler in an emergency, is kept on site.

Is Rejuran a filler?

No. Rejuran is a polynucleotide skin booster that works on skin quality and does not add volume. Some manufacturers do make hybrid products that combine polynucleotides with hyaluronic acid, so if a clinic describes something as a PN filler, ask for the exact product name.