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Why Rejuran I Is More Efficient Than Eye Cream for the 0.5 mm Skin Around the Eyes (Director’s Review)

Hongdae Dermatology Skin Clinic 弘大美丽石医院 · ✦뷰티스톤의원 합정역✦ · February 4, 2026

The science of 0.5 mm, Why the eye-area-specific ‘Rejuran I’ is needed ​ ​ Hello. I’m Kim Gaeul from Beautys Doctors. ​ ​ For those who are considering Rejuran I because of concern...

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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: February 4, 2026

Translated at: April 20, 2026 at 5:37 AM

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

Why Rejuran I Is More Efficient Than Eye Cream for the 0.5 mm Skin Around the Eyes (Director’s Review) image 1

The science of 0.5 mm,

Why the eye-area-specific ‘Rejuran I’ is needed

Hello.

I’m Kim Gaeul from Beautys Doctors.

For those who are considering Rejuran I because of concerns about under-eye wrinkles and dark circles,

I see you very often in the clinic.

As I spend all day

seeing and treating patients,

at some point,

the wrinkles around my eyes and dark circles also started to

become more noticeable to me.

Why do the skin around the eyes age so quickly?

The skin around the eyes is

one of the thinnest areas on our body,

with a thickness of only about 0.5 mm.

Because there are few sebaceous glands, it dries out easily, and

the blinking motion repeated tens of thousands of times a day

makes it one of the first areas

where aging begins.

That’s why many people

start with eye cream,

but if the dermal elasticity has already declined,

there is clearly a limit to what cosmetics alone can do.

Why Rejuran I Is More Efficient Than Eye Cream for the 0.5 mm Skin Around the Eyes (Director’s Review) image 2

I also thought, “Now it’s time to

start proper care for the eye area,”

so I actually underwent

Rejuran I treatment myself.

Today,

not only will I give a theoretical explanation as a doctor,

✔ why an eye-area-specific product is needed ✔ the treatment principle ✔ the changes I personally felt after receiving it

I’ll organize it calmly

from a medical perspective.

Why is there an eye-area-specific ‘Rejuran I’?

The key ingredient in Rejuran is

PN (Polynucleotide).

It is a tissue-regenerating substance extracted from salmon DNA,

and is a representative skin booster ingredient that improves the damaged skin environment and induces collagen production.

General Rejuran Healer

has relatively large particles

and a high viscosity.

!

If this formulation is used on the eye area, where the skin is thin,

✔ the product may clump together, or ✔ a bluish appearance of the skin, known as the

‘Tyndall effect,’ may occur.

Rejuran I was designed to address this issue

as an eye-area-specific formulation.

✔ Much smaller particles ✔ Softer viscosity ✔ Excellent spreadability

It was made to be less burdensome

for the thin, sensitive skin around the eyes.

Medical expected effects of Rejuran I

Rejuran I is

not simply a treatment that hides wrinkles.

The PN ingredient acts on the dermis to

gradually restore the thinned dermal thickness,

and as a result,

✨ soften fine lines ✨ improve moisture retention around the eyes ✨ reduce the appearance of dark circles ✨ strengthen skin texture and the skin barrier

You can expect

an overall anti-aging effect

around the eye area.

Rejuran I vs. Rejuran Healer

(If you want more detailed information ▼)

This is one of the questions I receive most often during consultations.

The two products are in the same category,

but their uses are clearly different.

Rejuran Healer

✔ For the entire face ✔ 2 cc volume ✔ Relatively high viscosity

It is intended to improve overall skin regeneration and elasticity.

Rejuran I

✔ For the eye area only ✔ 1 cc volume ✔ Low-viscosity, soft formulation

It is designed for thin, sensitive areas such as around the eyes,

reducing burden and the possibility of side effects.

Are embossing and pain unavoidable?

Why Rejuran I Is More Efficient Than Eye Cream for the 0.5 mm Skin Around the Eyes (Director’s Review) image 3

The biggest reasons people hesitate about Rejuran treatment are

‘embossing’ and ‘pain.’

The principle of embossing

Embossing is a natural reaction that appears during the process in which the highly concentrated regenerative ingredient remains in the dermis and is absorbed.

Because Rejuran I has fine particles,

most of it disappears within

12 to 24 hours.

Rather, if embossing appears evenly,

✔ it can be seen as a sign that it was injected at the correct depth ✔ and injected uniformly.

How much does it hurt?

Why Rejuran I Is More Efficient Than Eye Cream for the 0.5 mm Skin Around the Eyes (Director’s Review) image 4

(My honest review after personally receiving it)

I was also most curious about the pain,

so I received the treatment myself.

Because the skin around the eyes is thin

and the nerves are sensitive,

when the needle went in,

there was definitely a stinging sensation and a prickling, poking feeling.

However, because the formulation itself is soft,

compared with general Rejuran Healer,

the intensity of pain was relatively lower.

If it is accompanied by the techniques of an experienced medical professional and proper pre-treatment,

I felt that it is at a level that can be sufficiently endured.

(Pain varies greatly from person to person.)

Treatment guide to improve satisfaction

Rejuran I is

not a treatment that erases all wrinkles at once.

In line with the skin regeneration cycle,

✔ at 2- to 4-week intervals ✔ about 3 sessions on average

If the treatment is repeated,

many people feel that the skin barrier around the eyes strengthens

and firmness gradually builds.

The essence of a treatment that handles 0.5 mm

The thickness of the skin around the eyes is

about 0.5 mm.

Rejuran I also needs to be injected accurately

at this depth

to expect meaningful results.

If it is too shallow or too deep,

the outcome will differ.

In the end, eye-area treatment is not simply the act of injecting a drug,

but rather the clinical experience of the medical professional who understands

each individual’s anatomical structure around the eyes

and skin condition

that determines the result.

If you are considering Rejuran I treatment,

I recommend choosing a medical professional with sufficient consultation and rich clinical experience,

rather than focusing only on cost or distance.

Whether Rejuran I is appropriate for your current skin condition,

or whether other combination treatments are needed,

a 객관적인 judgment is

the path to the safest and most satisfying results.

Thank you for reading.

This was Kim Gaeul.

Why Rejuran I Is More Efficient Than Eye Cream for the 0.5 mm Skin Around the Eyes (Director’s Review) image 5

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