Rejuran HB (4-6 mo) vs Juvelook subdermal (12-24 mo): recommended areas and placement.
Author
Wi Young-jin · Chief director
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What is Juvelook? — 1.1 The History of Juvelook · 1.2 Mechanism of Action (PDLLA + HA)
The Full Lineup — 2.1 Three Facial Types (Juvelook, Volume, Skin) · 2.2 Area-Specific Treatments (Eye, Glam)
Treatment Combinations — 3.1 CureJet Combo (Needle-free Scar Care) · 3.2 Microneedle Combo (Deep Scars) · 3.3 Potenza Combo (RF + Pumping Tip)
Comparison and Choice — 4.1 Juvelook vs. Rejuran
To sum it up from the start, both Rejuran HB and Juvelook Subdermal Injection target "the deep dermis or underneath," but they aim for very different results. Rejuran HB combines PN + Hyaluronic Acid* to offer immediate hydration and a radiant glow, while Juvelook Subdermal uses PDLLA to stimulate long-term collagen and create structural improvements. Although they are both "deep layer treatments," they work on entirely different timelines.
*PN + Hyaluronic Acid (Rejuran HB): This formulation adds hyaluronic acid to the original Rejuran formula containing PN (salmon-derived DNA fragments). While PN facilitates cellular regeneration, HA delivers instant hydration and radiance. Formulated with lidocaine, it is often welcomed as the painless Rejuran.
How Rejuran HB Differs from Classic Rejuran
The classic Rejuran (Rejuran Healer) contains PN alone. While excellent for skin regeneration, it was somewhat limited in terms of immediate hydration and instant results. Rejuran HB* addresses this by blending in hyaluronic acid to deliver both benefits at the same time.
*Rejuran HB (Rejuran Healer Bright/Booster): This formulation enhances the classic Rejuran Healer with hyaluronic acid and lidocaine. It merges the cellular tissue regeneration of PN, the instant hydration of HA, and the comfort of lidocaine. Patients generally report up to a 50% reduction in discomfort compared to classic Rejuran.
According to a Prospective Observational Study of Polynucleotide Injections for Fine Wrinkles Around the Eyes, PN settles into the dermis to restore cell health, improve texture, and bring out skin glow. Rejuran HB builds on this with HA, providing extra hydration and instant radiance to the upper and mid-dermis. This immediate glow right after treatment is the most noticeable difference from classic Rejuran.
What is truly fascinating is that Rejuran HB (Hyaluronic acid + Booster) can be viewed as the PN version of the "PDLLA + HA" concept found in Juvelook. Both share a very similar approach: blending a long-term regenerative component with HA for immediate results.
Understanding Juvelook Subdermal Injections
While Juvelook is typically introduced directly into the dermis, it can also be administered into the subcutaneous layer right below the dermis depending on the treatment area and goals. This technique is known as the Juvelook subdermal injection. It is primarily used when Juvelook Volume is applied to deeper hollows and facial contours.
The subdermal layer lies just below the dermis, containing fat and connective tissues. Depositing PDLLA here delivers a beautiful synergy of collagen stimulation + structural volume. While general dermal injections are excellent for skin texture and fine surface lines, subdermal injections excel at addressing deeper folds, hollow cheeks, and facial contouring.
According to the Consensus Guidelines on the Reconstitution and Aesthetic Applications of PDLLA Microparticles, the recommended depth for Juvelook is either the deep dermis or the subcutaneous layer. Injecting too close to the surface significantly increases the risk of nodules or uneven texture. This is why subdermal injections place the highest priority on the precise depth control of your injector.
Where Their Paths Meet and Diverge
While both treatments are designed to work in the deeper layers of the skin, the exact definition of depth differs. Rejuran HB acts from the middle to deep dermis, whereas Juvelook subdermal injections go even deeper, reaching the subcutaneous layer below the dermis. Simply put, Juvelook subdermal is administered deeper.
Here is a quick summary of their actual benefits:
Rejuran HB → Instant hydration & glow + cellular regeneration beginning in 1–2 weeks, lasting for 4–6 months
Juvelook Subdermal Injection → Collagen stimulation starting in 1–3 months + structural volume improvement, lasting for 12–24 months
The ideal treatment areas also differ. Rejuran HB is perfect for overall skin tone, texture, and luminosity across the face, while Juvelook subdermal is ideal for hollow temples and cheeks, deep nasolabial folds, and contour lifting. Rather than competing directly, these two options act as complementary solutions targeting different skin depths and timeframes.
Which One is Right for Me?
Your choice will depend on your primary skin goals:
Immediate hydration, glow, and tone improvement → Rejuran HB
Facial contouring, hollow areas, deep creases, and long-term results → Juvelook Subdermal Injection (primarily Volume)
Regeneration, soothing, and light moisture → Classic Rejuran Healer
Texture, fine lines, and pore tightening → Juvelook Original (Dermal Injection)
It is also very common to receive both. For example, you might opt for Juvelook Subdermal during autumn and winter to enhance contours and volume, and follow up with Rejuran HB in spring and summer to boost radiance and skin texture. An approach that allows benefits to accumulate over time, rather than trying to fix everything with a single session, often leads to the most natural and satisfying results.
This brings our series to a close. We have covered everything from Juvelook's history and mechanism of action to its five-product lineup, ideal combinations, and a comparison with other popular booster treatments. Taking a moment to clarify your skin concerns before your scheduled consultation will make selecting the right lineup and combination much simpler.
Frequently Asked Questions
Q. Can I get Rejuran HB and Juvelook on the same day?
Yes, provided they are applied to different areas. For instance, you can receive Juvelook Subdermal for volume in your cheeks and Rejuran HB for overall glow and tone. However, we do not recommend administering both treatments to the exact same area on the same day, as this can make it difficult to evaluate the results and may increase the risk of minor side effects.
Q. Is Rejuran HB always better than classic Rejuran?
No, it depends on your needs. Rejuran HB is ideal for those seeking immediate hydration alongside rejuvenation. If your primary goal is pure skin healing and soothing, classic Rejuran (Healer) may be more suitable. Due to the added hyaluronic acid, Rejuran HB also carries a slightly higher price point. Choose according to your specific concerns.
Q. Do Juvelook subdermal injections carry a higher risk of nodules?
When placed precisely in the deeper layers, the risk of developing nodules is actually lower than with shallow dermal injections. However, if the product is inadvertently injected at the wrong depth, the likelihood of uneven texture or bumps increases. This is why subdermal treatments require an experienced injector with highly precise depth control.
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