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Hapjeong Dermatology Clinic, Special Collagen Injection Rejuran? Retigen

Hongdae Dermatology Skin Clinic 弘大美丽石医院 · ✦뷰티스톤의원 합정역✦ · November 28, 2025

Hello. This is Kim Ha-won from Hapjeong Dermatology Clinic. These days, around you, have you often heard people say, “I got a collagen booster injection”? But did you know that tre...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Hongdae Dermatology Skin Clinic 弘大美丽石医院

Original post date: November 28, 2025

Translated at: April 20, 2026 at 6:14 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Hapjeong Dermatology Clinic, Special Collagen Injection Rejuran? Retigen image 1

Hello.

This is Kim Ha-won from Hapjeong Dermatology Clinic.

These days, around you,

have you often heard people say, “I got a collagen booster injection”?

But did you know that treatments like

Sculptra, Radiesse, and Juvelook,

do not actually inject collagen directly?

Then what have you been

getting all this time?

No need to worry. It does not mean there is no effect.

Strictly speaking, these treatments are

“collagen production-inducing injections.”

They work by stimulating the skin and encouraging it to

produce its own collagen.

But there is something else.

There is also a treatment that truly

injects collagen directly.

That is Retigen,

which I will introduce today.

Why Retigen is special

Hapjeong Dermatology Clinic, Special Collagen Injection Rejuran? Retigen image 2

Retigen is a method that directly injects

purified, high-purity animal collagen into the dermis.

While other treatments induce collagen production,

Retigen delivers collagen itself directly.

This has the following advantages.

🩵 It stays in the skin for up to 6 months or more.

🩵 The skin texture becomes noticeably smoother.

🩵 Elasticity is restored firmly.

🩵 The effect starts immediately.

What is different?

Hapjeong Dermatology Clinic, Special Collagen Injection Rejuran? Retigen image 3

If the skin texture is rough, the pores are enlarged,

and elasticity has also declined,

moisturizing alone is not enough.

Other collagen treatments show their effects gradually,

but Retigen starts working immediately after injection.

Three things improve at the same time.

🩵 Skin texture refinement.

🩵 Improved elasticity.

🩵 Improved skin density.

Where can it be injected?

Hapjeong Dermatology Clinic, Special Collagen Injection Rejuran? Retigen image 4

Retigen has another advantage.

It can be used safely even on areas with thin skin.

🩵 Around the eyes

Effective for fine lines and improving elasticity.

🩵 Forehead and between the eyebrows

Helps reduce expression lines.

🩵 Cheeks

When pore care and skin texture refinement are needed.

🩵 Nasolabial folds

When you want to improve skin density.

🩵 Chin tip and neck line

When skin texture improvement is needed.

In particular, in sensitive areas such as around the eyes and cheeks,

it shows more even and natural results.

How many sessions are needed?

Usually, 2 to 3 sessions are recommended

at 3 to 4 week intervals.

However, this varies by individual.

Many people notice a change

even after just one session,

and the effect lasts for an average of 6 months or more.

It tends to last

clearly longer than other treatments.

How much does it hurt?

Even with numbing cream,

because it goes deep into the dermis,

you may feel a slight sting or pressure.

And since it is animal-derived collagen,

there is also a rare possibility of an allergic reaction.

If you are searching for a Hapjeong dermatology clinic,

we recommend a place that personally performs skin testing and consultation before the procedure.

I’ll also tell you about side effects

🩵 Bruising or swelling

These may occur temporarily right after the injection. Most disappear within a few days.

🩵 Pain or tenderness

This may occur because it is injected into deeper layers.

🩵 Allergic reaction

It is very rare, but the possibility exists. That is why pre-testing is important. Can it be done together with other treatments?

Yes, it can. In fact, the synergy is good.

There are combinations we recommend. If combined with lifting (Ulthera),

you can improve both elasticity and skin texture at the same time.

If combined with a skin booster or aqua glow injection,

you can strengthen hydration and density together.

If you are searching for a Hapjeong dermatology clinic,

you should definitely discuss the order and intervals

with the medical staff.

Frequently asked questions

What is different from other collagen treatments?

Other treatments induce collagen production.

Retigen directly injects collagen itself. That is why it is called the “real” collagen booster. How many sessions are needed?

Although it varies by individual,

2 to 3 sessions are usually recommended. Many people notice a difference after just one session. How long do the effects last?

Usually more than 6 months. It tends to last longer than other treatments. If you take good care of it, it may last even longer. Does it hurt a lot?

Even with numbing cream,

there may be a sting or tenderness depending on the area. However, it is usually manageable.

Today, we looked in detail at Retigen,

which directly injects collagen.

Everyone has skin concerns.

What matters is knowing the correct information

and choosing safely.

I hope this article

was helpful to you.

If you have any questions,

please feel free to leave a comment anytime. Haha.

This was Kim Ha-won from Hapjeong Dermatology Clinic.

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