SEOLREIM · JOURNAL
Rejuran vs. Hydration Injections: Skin Regeneration or Moisture Improvement—Which Suits You?
Medically reviewed · Confirmed 2026-10-30

Rejuran and hydration injections are both injectable skin boosters, but their main ingredients and goals differ. Rejuran focuses on PN-based improvement of the skin environment, while hydration injections mainly use hyaluronic acid to improve moisture and texture.
Key Search Terms
Rejuran, Rejuran benefits, Rejuran side effects, Rejuran treatment intervals, skin boosters, Gangnam dermatology clinic · Rejuran Seoul · Skin Booster Seoul · Water Glow Injection Seoul
Definition and mechanism
Rejuran is a skin booster that injects PN (polynucleotides) into the skin. Rather than adding volume like a filler, it aims to improve skin condition and the environment for recovery.
Potential benefits and limitations
Improvements in texture, fine lines, dryness, and reduced firmness may be expected. However, it does not directly lift deep wrinkles or sagging, or remove scars in one session. Research findings and perceived results vary among individuals.
Who may be a candidate
People with thin, dry skin, fine lines, or rough texture may consider consultation. Active inflammation or infection should be treated first.
Procedure and recovery
After consultation and skin assessment, anesthesia, disinfection, and injection follow. Redness, raised bumps, bruising, and tenderness may occur immediately afterward. Recovery varies by area and individual.

Side effects, precautions and contraindications
Pain, swelling, bruising, and redness are common possibilities. Seek immediate care for worsening pain, skin-color changes, blisters, heat, or pus. Disclose pregnancy or breastfeeding, skin infection, medications that increase bleeding risk, and ingredient allergies beforehand.
How it differs from other treatments
Rejuran focuses on PN-based improvement of the skin environment; hydration injections mainly use hyaluronic acid for moisture and texture; fillers primarily restore volume and contours in specific areas. Even within skin boosters, ingredients and purposes differ.
Common Questions in Online Communities
Recurring questions include: 'Does no raised bump mean no effect?', 'Can I work the next day?', 'Can Rejuran be injected under the eyes?', 'Is 1 session enough?' and 'Does more pain mean better results?' Raised bumps alone cannot determine effectiveness. Recovery and results vary, so confirm the injection areas and product with your clinician.
Medical Q&A
Q. Is 1 session enough? A. Response can be assessed after 1 session, but the number and interval depend on the product, skin condition and goal. Q. Can it be combined with hydration injections? A. Combination may be possible, but same-day treatment and sequence are determined after examination. Q. Can topical products at home replace it? A. Moisturizers and injections have different delivery methods and cannot be considered equivalent.
References
References include an expert consensus on PN (PubMed PMID 32799391), a systematic review of hyaluronic acid injection safety and adverse events (PubMed PMID 30636365), and an international consensus on cosmetic injection complications (PubMed PMID 27219265). Research varies by product and injection method and does not guarantee individual results.
Author, reviewer, publication date and update date
Medically reviewed · Confirmed 2026-10-30 · General medical information; not a substitute for an individual diagnosis or prescription.
Treatment at SEOLREIM Clinic
SEOLREIM Clinic discusses Rejuran and hydration injections according to actual ingredients and skin concerns, not names alone. Shining Rejuran or Royal Rejuran may be considered when thin skin, fine lines, rough texture and reduced firmness predominate; Super Miracle Water Glow Injection may be considered when insufficient hydration, uneven makeup application and surface dryness predominate. When needed, the sequence and intervals between the two procedures and possible combinations with lifting or pore care are planned according to skin condition and recovery time.
SEOLREIM Clinic is a skin and aesthetic clinic that has provided care in Gangnam, Seoul since 2011. Consultations and procedures performed directly by the clinic director form the basis of plans tailored to individual skin conditions. Treatment effects and recovery vary, so final decisions follow an in-person examination.
SEOLREIM · GANGNAM, SEOUL
Discuss skin treatments in Seoul at SEOLREIM Clinic.
SEOLREIM Clinic provides care based on consultations and procedures performed directly by the clinic director and its principles of authentic products, correct amounts and attentive care.
Tell us your treatment interests, skin concerns, dates in Korea and preferred consultation language. Confirm treatment suitability, recovery plans and language support before booking.
