Retizen in Seoul — a collagen skin booster that firms from within
A true collagen skinbooster that firms from within the skin
Overview
Retizen in Seoul (also known as Laetigen) is a collagen skin booster: instead of asking your skin to make collagen from scratch, it replenishes intercellular components directly, improving elasticity, tone and pore appearance. It is one of the gentler options at VOS, often chosen by people who want a treatment with very little pain.
Dr. Hongseok Kim recommends Retizen for dry, dull skin, sagging pores and fine lines, and for thin skin with low elasticity. Improvement is usually felt within 1–2 weeks and lasts around 6–12 months with maintenance; results vary by person.
Is Retizen right for you?
- Those concerned about dry, dull skin
- Those concerned about sagging pores and fine lines
- Those who want a treatment with very little pain
- Those concerned about thin, low-elasticity skin
- Those with dry and dull skin
- Those with enlarged pores and fine lines
What Retizen does in the skin
01Enhances skin functionality by replenishing intercellular matrix with 100% pure real collagen.
Laetigen is a collagen booster injection that directly replenishes Type 1 collagen, a key component of the dermis layer. Healthy skin has a firm structure in its layers, but as we age, the dermal layer deteriorates, collagen production declines, and elastin decreases. This leads to wrinkles and dryness in the epidermis. Laetigen restores the skin’s natural strength by delivering 100% pure Type 1 collagen directly into the skin layers. It rebuilds the weakened structure and enhances the skin’s inherent functionality. Directly inject collagen into the weakened skin layer, rather than boosting collagen production. Collagen, elastin, and hyaluronic acid levels increase, filling the gaps between cells to enhance elasticity and radiance.
02A safe injection produced through a sterilization process and proprietary purification process.
Laetigen, composed of 100% Type 1 collagen—the primary component of the human dermal layer—is produced through a sterilization process to ensure safety. This product is made using a advanced multi-stage filtration system to extract high-purity collagen, resulting in a neutral formulation that minimizes post-treatment swelling and discomfort. Additionally, it is certified by the U.S. FDA, offering enhanced reliability and trust.
Session, comfort, downtime, results
- Session time
- Within 20 minutes
- Comfort
- Numbing cream; mild discomfort only
- Downtime
- Temporary redness or swelling for a few days is possible
- Aftercare
- No washing or make-up for 24 hours; no sauna, hard exercise or alcohol for a week
- Results
- Felt within 1–2 weeks; about 6 months to 1 year (varies)
- Effective for enhancing skin radiance, elasticity, and hydration
- Results last for 6 months to 1 year with 3 sessions at monthly intervals
- Treatment Time: within 20 minutes
- Simple topical anesthesia
- Immediate return to daily activities post-treatment (minor redness may occur for 3-5 days)
Results, timing and recovery vary from person to person. Nothing here replaces an in-person consultation.
Retizen prices at VOS
Retizen is not on VOS’s current English price list. Send your concern and a photo on WhatsApp and you will get a quote before anything is scheduled.
Questions patients ask about Retizen
How much does Retizen cost?
Who is Retizen suitable for?
What should I avoid after Retizen?
What is the procedure — does it hurt?
When do results show and how long do they last?
Related treatments

Rejuran
Restoring Skin’s Self-Recovery Environment
Skin RegenerationFine Line Improvement- Those with thinner, more sensitive skin
- Those concerned about fine lines and rough texture
From ₩300,000 before VAT
How Rejuran works
Juvelook
Designing the skin’s natural regenerative power
Fine wrinkle improvementSkin texture improvement- Those who have started to develop fine wrinkles around the eyes, forehead, mouth, etc.
- For those with rough skin surfaces and uneven texture
From ₩1,000,000 before VAT
How Juvelook works
Hilo Wave
Skin quality improvement considering both skin moisture and structure
Volume ImprovementSkin Elasticity Improvement- Those who want overall skin quality improvement
- Those worried about needling, marks, swelling, or embossing
From ₩600,000 before VAT
How Hilo Wave works
Ready to ask about Retizen?
One message on WhatsApp is enough to start. No forms, no commitment.

