Juvelook vs. Rejuran: Which One Fits You?

One of the most common questions we hear from patients considering a collagen booster is some version of: "Aren't these all basically the same shot?" It's an understandable assumption — Juvelook, Juvelook Volume, and Rejuran get lumped together under one umbrella term all the time. But the products aren't interchangeable, and the layer of skin each one targets is the real variable that decides what you'll actually see in the mirror.

In this guide, we'll cover what separates these three treatments, why injection depth matters more than the name on the label, and how to figure out which one actually matches the concern you're trying to fix.

What Are Collagen Boosters, Anyway?

Collagen boosters are injectable treatments designed to trigger your own skin to produce new collagen over time, rather than adding instant volume the way a hyaluronic acid filler does. Instead of plumping a wrinkle on the spot, they introduce a biodegradable material — usually PDLLA, PCL, or PN — that provokes a mild, controlled response in the tissue. Your body reads that response as a cue to rebuild collagen over the following weeks.

That part is fairly well known. What tends to get lost is that "collagen booster" isn't one single formula — it's a category that includes several different products, each engineered to sit in a specific layer of skin. And that layer, more than the brand on the box, determines what kind of concern the treatment can realistically address.

Think of it like paint: the same can of paint does something very different on a wall than it does on a ceiling. With collagen boosters, the ingredient can be similar across products, but the depth it's placed at changes what actually improves.

Juvelook SB vs. Juvelook Volume: Not the Same Shot

Juvelook is a PDLLA-based biostimulator, and it comes in two forms that get injected at very different depths within the skin.

Juvelook SB is placed just under the surface, in the upper dermis. Because it sits close to the skin's surface, it's formulated to work on texture — fine lines, uneven tone, and overall firmness. It's a treatment aimed at the quality of your skin's surface, not its underlying shape.

Juvelook Volume, on the other hand, is injected much deeper, closer to the layer just above the fat pad. That depth makes it suited for structural volume loss — sunken temples, flattened cheeks, or the upper part of the nasolabial fold where fat has thinned. It's not really a texture treatment; it functions more like a biostimulating filler.

Same brand, same base ingredient, two different jobs. A patient who wants cheek volume back but receives SB instead of Volume is likely to be disappointed — not because the product failed, but because it was never designed to reach that layer in the first place.

Where Rejuran Fits In

Rejuran runs on a different active ingredient entirely: PN, or polynucleotide, derived from salmon DNA. Rather than primarily stimulating new collagen production, PN is better understood as a tissue-repair signal — it helps damaged or thinned dermis recover its own structure.

That distinction matters for who it suits. Rejuran tends to perform well on skin that's been weakened rather than simply aged — enlarged pores, acne scarring, or skin that's grown noticeably thinner and more fragile. If the main concern is "my skin feels compromised" rather than "my skin looks aged," Rejuran is often the more logical starting point.

One practical note worth flagging early: because PN is salmon-derived, anyone with a known fish or seafood allergy should mention that during consultation before moving forward.

Key Differences at a Glance

Here's how the three options stack up side by side.

Treatment	Injection Depth	Best For
Juvelook SB	Upper dermis	Fine lines, texture, overall firmness
Juvelook Volume	Deep dermis, near the fat layer	Sunken cheeks, temple volume loss
Rejuran	Mid-to-deep dermis	Pores, scarring, thinned or fragile skin

Pricing for each varies by clinic, how many sessions your plan includes, and whether products are combined in the same visit. A consultation is the most reliable way to get a number that applies to your specific case — current offers are listed at /en/promotion.

What to Expect After Treatment

Regardless of which product you get, the day-of experience is fairly similar: mild swelling, pinpoint redness at injection sites, and sometimes small bumps that settle within a day or two. Bruising is common and typically fades within about a week.

Results build gradually rather than showing up overnight, since the whole mechanism depends on your body generating new collagen on its own timeline. Most patients don't notice a meaningful difference after a single session — a series of three treatments spaced three to four weeks apart tends to be where the change becomes obvious, especially when you compare before-and-after photos rather than judging from the mirror alone.

Because the effect comes from your own collagen production, it isn't a one-time fix. New collagen breaks down over time just like your natural collagen does, so maintenance sessions every several months are typically needed to hold onto results.

Side Effects & Risks

These are considered low-risk, minimally invasive treatments, but they aren't without downsides.

• Bruising and swelling: Common and usually settles within a few days to a week.
• Temporary bumps or nodules: Can appear at injection sites, particularly with deeper Volume injections, and typically resolve on their own.
• Vascular risk: Because Juvelook Volume is placed deeper, near vessel-rich tissue, there's a somewhat higher risk of vascular complications than with surface-level SB injections — injector experience matters more here.
• Allergy considerations: Rejuran contains salmon-derived PN, so a seafood allergy history should be disclosed before treatment.

If you notice spreading redness, worsening pain, skin discoloration, or fever after treatment, contact your provider right away rather than waiting to see if it settles on its own.

The Bottom Line

A few things worth carrying with you:

• Collagen boosters aren't one product — Juvelook SB, Juvelook Volume, and Rejuran each target a different layer of skin.
• SB works on surface texture, Volume addresses structural volume loss, and Rejuran focuses on repairing weakened or damaged skin.
• Results build over a series of sessions rather than a single visit, and need periodic maintenance to last.

Like any injectable, these treatments come with trade-offs worth weighing honestly. Ultimately, the right choice depends on what's actually bothering you — fine lines, lost volume, or overall skin fragility — along with your budget and how much downtime you can work around.

If you're trying to figure out which layer matches your concern, a consultation is the most direct way to find out. BeautyStone is a dermatology clinic in Seoul's Hapjeong neighborhood — see current offers at /en/promotion.

Frequently Asked Questions

Q1. Does a collagen booster injection hurt?

Most patients describe it as a series of quick pinches rather than significant pain, and clinics typically apply a numbing cream beforehand to keep things comfortable. Deeper injections, like Juvelook Volume, tend to be slightly more noticeable than surface-level treatments.

Q2. How many sessions will I actually need?

A single session rarely produces a result you'll notice on your own. Most providers recommend a series of three treatments spaced three to four weeks apart, since collagen remodeling happens gradually rather than all at once.

Q3. How long do the results last?

Because the effect comes from your own collagen production, it isn't permanent — new collagen breaks down over time the same way natural collagen does. Many patients return for maintenance sessions every several months to hold onto results.

Q4. Can I wear makeup after treatment?

Most clinics ask you to wait at least a few hours, and sometimes until the next day, before applying makeup over the injection sites. Your provider will give you specific aftercare instructions based on which product and depth you received.