Two different ideas of a skin booster

In Korea, “skin booster” is a broad term for shallow injections that improve skin quality rather than change facial shape. Skinvive and Rejuran are two of the most requested, and visitors often assume they are interchangeable. They are not. They come from different ingredient families and solve different problems, which is why the right choice depends on what your skin is missing.

Skinvive by Juvéderm is a light, cross-linked hyaluronic acid gel with lidocaine, injected as tiny droplets into the dermis. HA attracts and holds water, so the effect is mainly hydration: smoother texture, softer fine lines and that lit-from-within glow. The US FDA approved it in May 2023 to improve cheek skin smoothness in adults over 21, with the effect lasting at least six months in the pivotal study.

Rejuran is a Korean polynucleotide booster. Polynucleotides are purified DNA fragments, traditionally derived from salmon, that are thought to support the skin's repair environment, fibroblast activity and hydration. Results are gradual and usually need a short course. Variants include Rejuran Healer for the face, a gentler Rejuran I for under-eyes and Rejuran S for scars.

Side-by-side comparison

The table summarises the typical differences. Timeframes are averages; skin type, age, sun exposure and how many sessions you have all influence results. Evidence for HA boosters such as Skinvive includes regulatory trials, while polynucleotide evidence is growing but comes mostly from smaller studies and clinical experience.

How each one feels and what the downtime is like

Both treatments start with numbing cream for about 20 to 30 minutes, followed by many small injections or a multi-needle device across the treated area. Skinvive contains lidocaine, which helps comfort during injection. Rejuran is generally described as stingier, and the small blebs it leaves are often a little more visible, typically for one to two days.

Afterwards, expect tiny bumps, some redness and the occasional bruise. Most people return to normal activities the same day, but skip makeup over the treated skin for several hours, avoid saunas, hard exercise and alcohol for a day, and don't massage the area. If you plan to be photographed, book either booster at least three to five days ahead, and preferably two weeks for Skinvive's full glow.

Our skin booster guide compares other options, including salmon DNA (PDRN) injections and exosome skin therapy.

Which one suits your skin

Think of Skinvive as watering a healthy plant and Rejuran as improving the soil. If your skin is basically healthy but looks flat, dry or crepey, especially on the cheeks, Skinvive delivers visible change quickly. If your skin is thin, easily irritated, marked by old acne, or tired from sun and harsh products, Rejuran's repair-oriented approach is often the better first step.

Neither treatment lifts sagging skin or replaces volume. If jowls or deep folds are your main concern, lifting treatments such as Thermage or fillers may be more relevant, and boosters can be added later to refine the surface.

Planning a course around a trip to Seoul

Time in Korea often decides the plan. With a single visit, Skinvive is easier to justify because one session can give a satisfying result. Rejuran usually works best as two to four sessions spaced two to four weeks apart, so it suits longer stays, repeat visitors or people who can continue the course at home.

A common approach for repeat visitors is to start Rejuran on the first trip, return for further sessions, and add Skinvive a few weeks before a wedding or event. Your Skin Library record keeps the product, depth and amount from each visit, so any doctor continuing the plan knows exactly what was done.

Costs depend on the product, the amount used, the area and whether you choose a course. We do not publish fixed prices in articles; message us for a written quote, and see prices and payment for how payment works.

Can you combine Skinvive and Rejuran?

Yes, and many Korean dermatology plans do. Because they work by different mechanisms, they complement rather than duplicate each other. Some doctors alternate them across sessions; others treat with Rejuran first and add HA later once the skin is stronger. Same-day combinations are possible in selected cases, but they increase the number of injections and the chance of visible bumps, so we usually prefer staging.

Boosters also pair well with laser treatments. After resurfacing such as Pico Fraxel, a doctor may time a booster to support recovery. The timing depends on the laser's depth and your skin's healing, so it should be planned rather than added on impulse.

Safety and who should wait

Both treatments are generally well tolerated in experienced hands. Common side effects are temporary redness, swelling, bumps, tenderness and bruising. Rarely, nodules, infection or allergic reactions can occur. Skinvive should not be used in people with severe allergies or anaphylaxis history, known lidocaine allergy or sensitivity to gram-positive bacterial proteins. Anyone with a fish or salmon allergy should mention it before Rejuran.

It is sensible to postpone either booster during active acne or infection in the area, a cold sore outbreak, pregnancy or breastfeeding, and in the days around a major dental procedure. If you have an autoimmune condition or take blood thinners, discuss it with the doctor first.

Aftercare to protect the glow

Good aftercare is simple but makes a real difference, especially in Seoul's dry winters or humid summers. If you're travelling, our article on glass skin packages with skin boosters has more planning ideas.

• Keep the skin clean and avoid makeup for several hours, ideally until the next morning.
• Skip saunas, jjimjilbang, hot yoga and heavy exercise for at least 24 hours.
• Avoid retinoids, exfoliating acids and scrubs for a few days.
• Use a gentle moisturiser and broad-spectrum sunscreen every day.
• Don't massage or press the bumps; they settle on their own.

Frequently asked questions

Related treatments and guides

Keep reading

• Glass Skin Package + Skin Booster
• Microneedling + Skin Booster Korea
• Rejuran + Botox Combination
• Pico Laser + Rejuran in Myeongdong
• Juvelook for Early Aging

Sources

1. U.S. FDA – SKINVIVE by JUVÉDERM (P110033/S059) approval information
2. Polynucleotides in Aesthetic Medicine: A Review of Current Practices and Perceived Effectiveness (PMC)
3. Cleveland Clinic – Dermal Fillers: What They Are, Types, Benefits & Side Effects