Improving Dermal Layer Health
Hello, this is Raon Dermatology Clinic at Oksoo Station.
You may have heard that maintaining healthy skin requires good care of the dermal layer. Even so, many people do not know what role and function the dermal layer actually has. So today, we plan to share detailed information about it! From why the dermal layer is so important to how you can manage it, let’s take a look:)

Improving Dermal Layer Health
What is the role of the dermal layer?
The skin is divided into multiple layers, and among them, the dermal layer is the central axis that supports the skin’s structure and function. It is rich in components such as collagen, elastin, and hyaluronic acid! These components directly affect the skin’s flexibility, density, and moisture-retention ability, while also serving as a barrier against external irritation.
The surface of the skin can look healthy and elastic only when the dermis is kept strong. However, as we age, the production of collagen and elastin decreases, and when the structure becomes looser, loss of elasticity and wrinkles gradually appear. That is why, if you want firm skin, you need to focus on caring for the dermal layer first.

What is the role of the dermal layer?
01. Densiti High
So how should you manage it specifically~? Today, we’ll look at four categories of care methods. First, “Densiti High” is a lifting treatment characterized by a dual method that delivers radiofrequency energy at different depths. It applies bipolar radiofrequency to the shallow layer and monopolar radiofrequency to the deeper layer, inducing collagen regeneration across the entire skin layer.
Bipolar radiofrequency mainly strengthens elasticity in areas close to the epidermis, while monopolar radiofrequency stimulates the deep dermis to reorganize the arrangement of collagen fibers and promote elastin production. This dual approach can provide more stable and balanced results than single radiofrequency. It may be especially suitable for people in their 40s and older, when signs of aging begin in earnest, right?
<Densiti High>
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Dual radiofrequency lifting
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Bipolar - stimulation of superficial layers
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Monopolar - stimulation of deep layers
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A lifting treatment that increases dermal density

01. Densiti High
02. Juvelook, Juvelook Volume
Juvelook and Juvelook Volume are injectable products with a combined structure of PDLLA and hyaluronic acid, stimulating collagen production within the dermal layer to improve both skin density and elasticity. PDLLA slowly breaks down in the skin and promotes the body’s own collagen production, while hyaluronic acid holds moisture and provides immediate hydration.
Juvelook has a smaller average particle size (30 μm), making it suitable for even injection across the face and helping to improve skin texture and reduce fine wrinkles. In contrast, Juvelook Volume has larger particles (50 μm), so it focuses on filling in hollowed areas and supplementing elasticity. Depending on the particle characteristics, you can choose the option that fits your desired area and purpose:)
<Juvelook>

02. Juvelook, Juvelook Volume
03. OLLIDIA Mayo
Third, “OLLIDIA Mayo” is a collagen booster whose main ingredient is PLLA. It gradually breaks down in the body and stimulates the inside of the dermal layer to induce new collagen production. Rather than an immediate change, the effect appears over time in a natural way as the skin rebuilds itself.
It is not a method that temporarily fills in sunken areas with volume; instead, it focuses on restoring density and elasticity from deep within the skin. Its effects can last up to two years, and another advantage is that it can be used safely without side effects such as nodules. It is an option we can confidently recommend to people who want to change the structure of the skin itself:)
<OLLIDIA Mayo>
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PLLA-based collagen booster
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Very low risk of nodules due to its particle structure
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Natural volume and elasticity

03. OLLIDIA Mayo
04. Rejuran Skin Booster
Lastly, the Rejuran product line is based on PN (polynucleotide) ingredients and helps regenerate damaged dermal cells while improving the skin environment. Rejuran Healer is specialized for tissue regeneration and is a skin booster that helps structurally recover skin with reduced elasticity and signs of aging. Another advantage is its high level of safety, which is why it is often used even on sensitive skin!
Rejuran HB adds hyaluronic acid and lidocaine, making it a product that considers both enhanced moisture retention and reduced pain. In particular, for skin that is sensitive or recovers slowly due to dryness, it is an effective solution that can improve both elasticity and hydration at the same time. For those who want regular care without worrying about resistance or side effects, we recommend the two skin boosters below:)

04. Rejuran Skin Booster
Dermatologist-Recommended Ways to Improve the Dermal Layer

Prime location near Wangsimni Intersection
- Exit 9 of Wangsimni Station in Haengdang-dong, Seongdong-gu -
👉 Direct access to 4 subway lines
Line 2 (Sindang, Sangwangsimni, Seongsu)
Line 5 (Singeumho, Haengdang, Majang, Dapsimni)
Gyeongui–Jungang Line (Oksoo, Eungbong, Cheongnyangni)
Suin–Bundang Line (Seoul Forest)
