
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.

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?

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?

(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.

