If you've been reading up on Rejuran, the name "Rejuran HB" probably popped up too — and it's easy to wonder whether it's a totally different treatment or just another version of the same thing. In our consult room, "So what's actually different about plain Rejuran and HB?" is usually the very first question we get.

The short answer: they're part of the same family, built on the same salmon-derived ingredient. Both use the same core component, polynucleotides, to help your skin repair itself from the inside. HB simply adds hyaluronic acid on top, so you get hydration and a subtle plumping feel alongside that recovery. So instead of "one is just better," the right pick comes down to what your skin needs most right now — smoother texture and firmness, or relief from dryness and a sunken look.

> This article rounds up treatment information from Hapjeong Beautystone.

What you'll get from this article

• Whether Rejuran and Rejuran HB are the same family or different products

• How the two differ in hydration, firmness, and plumping

• A clear way to judge which one suits your specific skin concern

• A few things worth checking before you book

Why people get stuck choosing between Rejuran and HB

Rejuran is an ECM skin booster that delivers polynucleotides* — extracted and purified from salmon — into the skin to boost its own ability to repair itself. But once a product with "HB" tacked onto the same name showed up, mixed-up information started circulating about whether the two are identical or one is an upgrade.

polynucleotides*: an ingredient extracted and purified from salmon DNA. Delivered into the skin, it stimulates fibroblasts to support the skin's own recovery and texture improvement.

First things first: the two share the same core ingredient. As research showing that polynucleotide-class ingredients speed up damaged-skin recovery by aiding cell migration and blood-vessel formation notes, this ingredient encourages fibroblast activity within the skin to support repair — and that mechanism is identical in both products. The difference is what gets added to it.

Same salmon ingredient — here's the core difference

The biggest difference is "what's added alongside it." Plain Rejuran leans on polynucleotides and focuses on texture and firmness recovery, while Rejuran HB adds hyaluronic acid* to bring hydration and a slight plumping feel into the mix. As research on combination formulas using hyaluronic acid and polynucleotides together — delivering hydration, volume, and recovery at once shows, HB is built so the two ingredients split the work.

hyaluronic acid*: a hydrating component your skin already contains naturally. It draws in water to deliver moisture and a touch of volume.

As the table makes clear, these aren't "different treatments" — it's the same recovery ingredient, with the choice being whether or not to add hydration. So the direction of recovery (your skin regenerating itself) is the same; where they split is the hydration and plumping you actually feel afterward. Framing it that way makes it easy to grasp.

Hydration, firmness, plumping — where do they actually differ?

Polynucleotides build recovery slowly within the skin, so for both products the results show up over several weeks rather than all at once. It's not an instant change right after the procedure — texture and firmness fill in gradually as you stack up sessions.

Where you do feel a difference is in the first few days after treatment. Because HB contains hyaluronic acid, that hydrated, slightly filled-in feel arrives relatively quickly, right from the start. Plain Rejuran, on the other hand, is less about immediate volume and more about smoother texture building over repeated sessions, so the early sensation is gentler and more subtle.

As for recovery, both products let you get back to daily life fairly quickly. Small bumps, redness, or bruising at the injection site are common and settle within a few days. That said, HB is thicker, so the injected area can feel a little heavier — leaving a few days of buffer before any important event is the reassuring move.

Why Hapjeong Beautystone?

Rather than pushing "the pricier, fancier product," Hapjeong Beautystone first looks at what your skin needs most urgently right now, then decides on the product. Even with the same salmon ingredient, someone with significant dryness and a sunken look may do better with HB's hydration, while someone whose main concern is texture and firmness may suit plain Rejuran — so we look at your skin condition and decide together. Being a small clinic within walking distance of Hapjeong Station, we can watch each person's recovery pace and plan the next session together.

Worth checking before you go in

Even within the same family, the right choice shifts with your skin condition, so sorting out a few things before your treatment makes the whole thing feel easier.

• Is your main concern texture and firmness, or hydration and sunkenness? — texture and firmness lean toward plain Rejuran; dryness and sunkenness lean toward HB

• Recovery timing — bruising and small bumps can last a few days, so leave a buffer before any important event

• Session spacing — typically you build results over several sessions, roughly 2–4 weeks apart

• Combining with other treatments — work out the order with lasers, lifting, and the like with your provider

• Skin sensitivity — there may be temporary irritation after injection, so keep your skincare simple before and after

This article rounds up general information, so whether a treatment suits you and which product to choose are best decided in consultation with a provider who has examined you directly.

Frequently asked questions

Q. Is Rejuran HB simply better than plain Rejuran?

A. It's less "simply better" and more that it adds hyaluronic acid to the same recovery ingredient, so you get hydration and plumping alongside it. If texture and firmness are your main concern, plain Rejuran may fit; if dryness and a sunken look are bothering you, HB may suit you better. It's best to decide in a consult, looking at your own skin.

Q. When do the effects start to show?

A. Polynucleotides boost your skin's own recovery, so the real change appears slowly over several weeks. Thanks to the hyaluronic acid, HB brings a hydrated feel relatively quickly right after treatment, while texture and firmness changes tend to become noticeable around the 4-week mark as you stack up sessions.

Q. How many sessions do I need?

A. Most people treat about 3 sessions, roughly 2–4 weeks apart, as one set. Since it builds skin recovery over repeated sessions rather than finishing in one, it's best to decide the number with your provider based on your skin condition and response.

Q. I bruised after treatment — is that okay?

A. Light bruising or small bumps at the injection site are common and usually settle within a few days. HB is thicker, so the injected area can feel a little heavier. That said, if it keeps getting worse or you notice added warmth or pain, please contact the provider who treated you.

Further reading

• Painless Rejuran — HB Plus vs Healer, where do they differ?

• What side effects can skin boosters cause, and what should you check to get them safely?

• Looking into Rejuran for neck wrinkles? Here's what to check before your treatment

• How do Rejuran Healer and HB Plus differ, and how do you pick the less painful one?