Inner Skin Regeneration After Summer UV — How We Approach Rejuran

Hello. This is Dr. Kim Yeon-jin, director of UHCELL Clinic Gangnam, where we focus on each person’s own beauty.

As summer winds down, I often hear these in the clinic:

• “After summer, my skin gets dry and the texture turns rough.”
• “There’s no firmness and makeup won’t sit well.”
• “My under-eye area especially feels thinner, with more fine lines.”

The UV and dryness built up over summer lower the skin’s capacity to regenerate.
Today I’ll calmly talk about Rejuran, often discussed as a concept that helps the inner regeneration of summer-worn skin.

After summer, why does texture turn rough?

Several things overlap in summer skin damage.

Strong UV weakens dermal collagen (the protein that supports firmness), while frequent air conditioning, sweat, and washing break down moisture and the barrier together.

As this damage accumulates, the skin’s own pace of regeneration slows, and you feel the texture turn rough or firmness drop.

• UV lowers collagen and regeneration capacity
• Air conditioning and sweat damage moisture and the barrier
• As recovery slows, texture and firmness drop

So skin that turns rough after summer is often not simple dryness but a state where “regeneration couldn’t keep up.”

What does Rejuran help with?

Rejuran is used on the idea of delivering PN (polynucleotide, an ingredient derived from salmon DNA) directly into the skin to help the skin’s own regeneration environment.

Beyond applying to the surface, it’s put directly into the skin, looking at areas like texture, firmness, and inner dryness together.

• Rejuran Healer: the base line that helps overall texture and regeneration
• Rejuran i: a line for the thin, delicate under-eye area

Since the focus changes with the area and skin state, the key is finding the approach that suits your skin rather than what is “best.”

Can home care regenerate skin?

This doesn’t mean home care is meaningless. The basics are built at home.

• Daily UV protection to reduce further damage
• Enough moisture to help barrier recovery
• Managing sleep and lifestyle to maintain the regeneration environment

Still, there are clear limits.

Surface dryness and flakiness may settle to some degree with consistent home care.
But an already-lowered regeneration capacity or inner dryness isn’t easy to fill inside the skin with topicals alone.

That’s exactly why so many people say, “I apply good products, but the texture stays the same.”

How does a clinic approach it?

The core of clinical regeneration care isn’t “strong, all at once” but “matched to the skin’s state, in stages.”

Rather than finishing Rejuran in one session, it’s usually done over several sessions a few weeks apart, watching how the skin recovers.

Here is something I want to share honestly.

• Change is often observed gradually over several sessions rather than appearing at once
• The suitable line and method change with your skin type and area, so it’s safer to assess your state first
• Effects and how long they last vary widely from person to person

Type	Key point
Overall texture & regeneration	Help the regeneration environment with Rejuran Healer and the like
Thin under-eye	Approach delicately with Rejuran i and the like, suited to the area

That’s why I believe the most important thing in regeneration care isn’t the product’s name, but the process of first reading “where your skin is worn out.”

Frequently Asked Questions (FAQ)

How many Rejuran sessions are needed?

It varies with your skin state and area, so it’s hard to state definitively. It’s usually done over several sessions a few weeks apart, and the number and interval are best decided after a specialist’s diagnosis. There is individual variation.

What’s the difference between Rejuran Healer and Rejuran i?

Healer is the base line that helps overall texture and regeneration, while Rejuran i is a line for the thin, delicate under-eye area, so the focus differs. Which line suits you is best decided by looking at your skin state.

Can’t I just use topical cosmetics?

Home care matters as a foundation, but an already-lowered regeneration capacity or inner dryness is hard to fill inside the skin with topicals alone. That said, the need and method vary by individual, so we recommend a consultation.

Is it okay to get it in summer?

More important than the season are your skin’s condition and your schedule. That said, UV protection and moisturizing matter more after a procedure, so it’s best to consider your lifestyle too. We recommend a specialist consultation.

※ Effects and how long they last vary by individual; for an accurate assessment, please consult a specialist.