Why you must choose the right type of skin booster based on its ingredients

Skin boosters are not a single product name. It is a general term for injectable procedures that directly inject active ingredients into the dermal layer to improve the quality of the skin itself. So the question "Which skin booster should I get?" is actually the same as asking "Which ingredients should I put in?" Broadly speaking, they are categorized into the hyaluronic acid (HA) lines that fill moisture, PN/PDRN lines that help regeneration and elasticity, PLLA lines that stimulate collagen production, and the emerging category of exosome lines.

This is where it is decisively different from topically applied cosmetics. Cosmetics stay on the stratum corneum, but most skin boosters push ingredients into the upper to mid-dermis (about 1.5 to 3 mm). Since this is a method that signals the skin to improve on its own, it only becomes meaningful when the ingredients match your concerns. Let's break them down one by one below.

🧴 How are skin boosters different from fillers and Botox?

Although they are the same injections, their purposes are completely different. Fillers fill volume, Botox relaxes muscles, and skin boosters change the skin texture itself. If you confuse these three, you will end up expecting the wrong procedure.

• Filler: Fills sunken areas to create shape (nasolabial folds, lips, etc.)

• Botox: Relaxes overactive muscles to reduce wrinkles

• Skin Booster: Enhances skin texture and elasticity with moisture, regeneration, and collagen

The core target of action is fibroblasts (Fibroblasts). These are the cells that produce collagen and elastin. The various ingredients of skin boosters eventually wake up these cells and induce the skin to regenerate itself. Since these three procedures have different purposes, they are often designed together.

📌 Key Summary: Fillers are for volume, Botox is for muscle relaxation, and skin boosters are for skin quality improvement. Since their purposes are different, do not confuse them.

💧 HA (Hyaluronic Acid) Line — The Identity of Mulgwang Injections

The most familiar to the public, Mulgwang injections are HA-line skin boosters. That is why the question "Are Mulgwang injections and skin boosters the same?" often arises, and it is accurate to see Mulgwang injections as a type of skin booster.

The main purposes are moisture supply, glow, and skin texture improvement. It is well-suited for dry, dull skin and cases where fine wrinkles are prominent. The effect appears relatively quickly, so moisturizing is often felt within a few days to 2 weeks.

A major advantage of the HA line is its safety. Even if side effects or lumping occur, they can be decomposed with an enzyme called hyaluronidase. It is good to remember that HA is virtually the only ingredient capable of this reversal. For reference, in the clinical trial of Skinvive, an FDA-approved HA product, more than 89% of patients experienced improvement in skin roughness at 1 month post-treatment, and the effect was reported to last up to 6 months.

📌 Key Summary: Mulgwang injection = HA line. It focused on moisture and glow, and is the only line that can be decomposed with an enzyme in case of problems.

🐟 PN/PDRN Line — The Axis of Regeneration and Elasticity

Along with HA, the other major axis of skin boosters is the PN (Polynucleotide) line. Derived from salmon DNA, Rejuran Healer is synonymous with this category.

The purpose is not moisture, but regeneration and elasticity. Since it aims to boost recovery from within the skin, it is frequently chosen for irritated skin or skin lacking elasticity. Clinically, Rejuran (PN) has been reported to improve skin elasticity and moisture content by about 20% each, 4 weeks after the procedure. The effects generally appear gradually over 2 to 4 weeks.

What is often confused is the difference between PN and PDRN. Both are DNA fragment lines, but their molecular sizes are different. PN is a relatively long DNA chain, and PDRN is a smaller fragment, with PDRN being more focused on anti-inflammation and tissue recovery. Although they are often lumped together under the same category, there are subtle differences in their purposes.

One more thing. Lines are divided even within the same brand, such as Rejuran Healer (regeneration-focused) and Rejuran HB (moisturizing enhanced by mixing HA). Even if the names are similar, the goals are different, so it is good to confirm during consultation.

📌 Key Summary: PN/PDRN is for regeneration and elasticity. Rejuran is the representative. PN is a long chain, and PDRN is a small fragment, so their purposes are slightly different.

🧬 PLLA·PDLLA·CaHA Line — The Way to Stimulate Collagen

While the previous two lines fill in ingredients, this line consists of biostimulators that stimulate the skin to produce its own collagen. Juvelook (PDLLA) and Sculptra (PLLA) belong here.

The characteristic is that they are slow but long-lasting. The effects generally appear gradually over 1 to 3 months. It is considered when you want fundamental skin density, pores, and elasticity rather than quick results. In Juvelook (PDLLA) clinical trials, more than half of the subjects showed more than 50% improvement in fine wrinkles and rough skin texture, and collagen and elastin density in biopsies were reported to have increased significantly.

CaHA (Calcium Hydroxyapatite) is also used as a collagen-stimulating skin booster when diluted and injected. However, this collagen-stimulating line is different from HA in that it cannot be reversed with hyaluronidase. Therefore, the injector's judgment and injection technique become more critical.

📌 Key Summary: PLLA, PDLLA, and CaHA are collagen stimulators. They take longer to work but last long, though reversal is difficult.

✨ Exosomes and PRP — Emerging Categories and Self-Regeneration

Exosomes are stem cell-derived extracellular vesicles intended to deliver regeneration signals. One study reported up to a 3-fold increase in collagen and a 13-fold increase in elastin, but since this is a single study result, overinterpretation should be avoided. Above all, approval and safety issues are the key variables. This is a category where you must check the approval status and indications of the Ministry of Food and Drug Safety.

PRP/PRF (Platelet-Rich Plasma) is a self-regeneration method that injects components separated from your own blood. While there is a sense of reassurance in using your own blood, standardization is difficult and individual differences are significant.

One thing should be made clear. Using unapproved injection components poses legal and safety risks. As for emerging ingredients, checking the official approval status comes first, rather than relying on claims of effectiveness.

📌 Key Summary: Exosomes and PRP are regenerative, but safety confirmation comes first due to approval and standardization issues.

📊 Skin Booster Types At-a-Glance Comparison

The treatment intervals are also different for each category. HA is given 2 to 3 times at 2 to 4-week intervals, PN/PDRN is 3 to 4 times at 2 to 4-week intervals, and collagen-stimulating lines are observed for several months after 1 to 3 treatments. In common, meaningful changes appear in repeated treatments at intervals of 2 to 4 weeks rather than 1 treatment.

📌 Key Summary: The purpose, onset of effect, and cycle are different for each category. Don't judge in a rush and make a plan.

🎯 Which One Should I Choose for My Skin?

The standard of choice is simple. They are not good because they are expensive, but they are good when your concerns and the ingredients match.

• Dry, dull skin, glow → HA (Mulgwang injection)

• Regeneration, elasticity, tired skin → PN/PDRN (Rejuran, etc.)

• Collagen induction, pores, skin density → PLLA/PDLLA (Juvelook, etc.)

If dryness and loss of elasticity are a concern at the same time, two categories with different characteristics may be combined, or lines may be combined. This is a point where judgment varies, so consultation is necessary.

Onlif Clinic focuses on non-surgical procedures that alleviate skin concerns such as aging and loss of elasticity, rather than plastic surgery that changes the shape of the eyes, nose, or mouth. Skin boosters correspond to the moisturizing and skin barrier axis among them, and they are sometimes designed together with elasticity treatments such as ultrasonic HIFU and high-frequency RF as needed. This is also the reason why we approach with different staff in charge for each procedure, under the philosophy that "one person cannot do everything perfectly."

For reference, the skin booster market is growing rapidly. The global scale is expected to grow at a CAGR of 10.9% from about $1.42 billion in 2025 to about $2.43 billion in 2030. In South Korea, it is projected to grow by about 16% annually from about $86.5 million in 2024. As the number of options increases, having a discerning eye to choose has become more important.

📌 Key Summary: Matching ingredients with concerns is key. Since multiple categories can be combined, diagnosis comes first.

🩹 Post-procedure care and precautions

Immediately after the procedure, embossing, in which the injected area rises up in bumps, occurs. It usually subsides in a few hours to 3 days, but may last for more than a week depending on the area or product.

Common care guidelines are as follows:

• Refrain from drinking alcohol, sauna, and intense exercise for 1 week

• Use sunscreen and apply sufficient moisturizer

• Refrain from using irritating ingredients such as retinol and AHA/BHA for a few days after the procedure

• Do not stop prescribed medications such as anticoagulants at your own discretion, but consult with medical staff

Although rare, if there are abnormal signs such as vascular-related problems, severe pain, or vision abnormalities, you must visit the hospital without delay. And if you are pregnant, breastfeeding, have a keloid constitution, or have certain immune diseases, it is safe to inform them before the procedure.

📌 Key Summary: Avoid alcohol, sauna, and exercise for 1 week. Sun protection and moisturizing are essential. For abnormal signs, go to the hospital immediately.

❓ Frequently Asked Questions (FAQ)

Are skin boosters and Mulgwang injections the same thing?

Mulgwang injection is a general term for HA (hyaluronic acid) line skin boosters. In other words, Mulgwang injection is a type of skin booster. If the purpose is moisture and glow, Mulgwang injections are suitable; if the purpose is regeneration and elasticity, they diverge based on the purpose, such as the PN line.

What is the difference between Rejuran and Juvelook?

Rejuran is a PN-line focusing on regeneration and elasticity, while Juvelook is a PDLLA-line focusing on collagen stimulation. Since their purposes are different, they are sometimes designed together, but the order and combination vary depending on skin condition, so diagnosis is required.

Are PN and PDRN the same ingredient?

Both are fragments derived from salmon DNA, but their molecular sizes are different. PN is a relatively long DNA chain, and PDRN is a smaller fragment, focusing more on anti-inflammation and tissue recovery. Although grouped in the same category, there are subtle differences in their purposes.

How many treatments do I need to see results, and how long does it last?

Usually, meaningful changes appear when repeated several times at 2 to 4-week intervals. HA is 2 to 3 times, PN/PDRN is 3 to 4 times, and collagen-stimulating lines are observed for several months after 1 to 3 treatments. The maintenance period varies depending on ingredients and individual differences.

Are exosome injections safe?

Exosomes are an emerging category aimed at regeneration signals, and above all, checked for MFDS approval and indications. Since using unapproved ingredients can pose legal and safety risks, we recommend checking official approval status first, rather than focusing on claims of effectiveness.

If I have a fish allergy, should I avoid Rejuran (PN)?

Since PN is derived from salmon DNA, patients with fish allergies must inform medical staff before the procedure. In this case, other lines such as HA can be reviewed, so it is safe to confirm during consultation.

Is an expensive skin booster unconditionally more effective?

No. Matching your skin concerns with the ingredients is much more important than the price. Choosing the right one for your purpose, such as HA for dryness, PN/PDRN for regeneration and elasticity, and PLLA for collagen induction, is the standard for cost-effectiveness.