🏢 Is it really worth getting the Rejuran HB treatment at Diar Dermatology? I had to go there to find out the truth.
Some time ago, many friends asked me whether Rejuran HB from Diar Dermatology was really effective. To be honest, I was also curious – because HB is the most expensive product in the Rejuran series, and its main claims are deep anti-aging effects and repair of the skin barrier. However, there were very few real reviews about it online. Last month, when I happened to be in Seoul, I took the opportunity to go to Diar for a consultation and experience their products firsthand. Today, I will share with you everything about the process and the results.
Diar Dermatology opened at the end of 2025, but don’t let the word “ANEW” put you off—all three directors are experts with over 20 years of experience, having previously worked at ID Dermatology and Meixiao Dermatology. Located in the heart of Gangnam Station, the location is extremely convenient, and I really give that a big plus.
💉 What is the difference between Rejuran HB from Diar Dermatology and ordinary black-box products? How long does it take for the swelling to subside after the procedure?
Let me state the conclusion first: HB is not an upgraded version of the “black box” product; it is a completely different product. Many clinics tend to promote these two products together, but the director of Diar will explain this clearly during in-person consultations.
🧬 Rejuran PN (Healer)
Its active ingredient is cPDR
N, which is derived from salmon DNA. Its main function is to promote skin regeneration and repair. It is suitable for people with enlarged Pores, rough skin, or mild fine lines. After the treatment, there may be slight pinprick marks and redness, which usually subside within 1-2 days. The effect lasts for 6-12 months.
💎 Rejuran HB (Skin Booster Premium) is composed of cPDRN and cross-linked Filler, combining the effects of regeneration a
nd filling in one product. After the treatment, the skin immediately feels moisturized, unlike other treatments where effects may only become apparent after several weeks. However, the downside is that post-treatment swelling is more noticeable than with other methods – I experienced some swelling on the afternoon of the treatment, which reduced significantly by the next day and had almost returned to normal by the third day. If your schedule is tight, it is recommended to allow at least 2-3 days for recovery.
📊 Comparison between HB and black boxes
| Comparative items | black box | HB |
|---|---|---|
| Core ingredients | cPDRN | cPDRN + Cross-linked Filler |
| Speed of effectiveness | Progress gradually over 2 to 4 weeks | Immediate moisturizing effect |
| Postoperative swelling | 1-2 days | 2-3 days |
| Duration | 6 to 12 months | 12 to 18 months |
| Suitable for | Mild signs of premature aging | Moderate aging + sagging |
💡 Practical experience: On the third day after the HB procedure, the skin texture did seem different after the swelling subsided; it felt more supple to the touch. However, since masks were required when going out in the first two days, sisters who are concerned about the swelling might want to consider the black box option.
💰 Diar Dermatology announces the actual prices for 2026: How much does Rejuran HB actually cost?
This price list was compiled by me after verifying several different sources 👇
| Project Name | Reference price (Korean won) | Remarks |
|---|---|---|
| Rejuran Glow Hyaluronic Acid Injection 1 centum core | Starting from ¥250,000 | Basic glow rejuvenation therapy |
| Rejuran PN 2 centum core | Starting from ¥222,000 | PN repair and anti-aging |
| Rejuran HB 1 centum core | Starting from ⩢350,000 | Dual effects of regeneration and filling |
| LDM needle-free glow therapy | Starting from ¥150,000 | Moisturization without any recovery period |
| 100 shots of the Ulthrea version | Starting from ¥200,000 | Fascial layer lifting |
| Thermage FLX for the entire face | Starting from ₩550,000 | Market reference price starts from ¥9.55 million. |
| Potenza | Starting from ⩡400,000 | Pores/Acne Scars |
| 1 centum core of Filler | Starting from ¥200,000 | Local filling |
| Collagen filling | Starting from ¥350,000 | Deep support |
| Facial thread lifting | Starting from ¥600,000 | Contour lifting |
💡 Exchange rate reference for April 2026: 1 Korean won ≈ 0.024 ANEW New Taiwan dollars / 0.0053 RMB. The prices provided are for reference only; the actual prices shall be subject to the rates quoted by the clinic on the day of service.
🩺 The experience of having a in-person consultation at Diar Dermatology: The director is truly patient.
I made an appointment by adding WeChat with the ID s-sourire. I told the customer service that I wanted to undergo Rejuran HB treatment, and they arranged a consultation with Director Zhang Huizhen for me. Upon arriving at the clinic, I first had a VISIA skin examination, and then the director conducted a personal consultation. Using a dermoscope, she checked the condition of my Pores and fine lines, and also felt the structure of my facial bones with her hands.
When Dr. Zhang conducted the consultation, she was very attentive. She directly told me, “For your skin condition, a Black Box treatment would be sufficient; the filling effect of HB might be a bit overkill for you.” This approach of not aggressively promoting expensive treatments really reassured me, and in the end, I chose the combination of Black Box and hyaluronic acid injections. The entire consultation took about 20 minutes, and she patiently answered all my questions.
The procedure took approximately 40 minutes. The director was very skilled and constantly checked whether I was experiencing any pain during the injection. Immediately after the treatment, I applied a calming facial mask for 15 minutes, and the nurse instructed me on the post-treatment precautions. The next day, I had already returned to almost normal, and my recovery was faster than I expected.
💡 If you also want to find out whether HB is suitable for you, it is recommended that you first communicate via WeChat by sending over photos of your skin and the issues you would like to address. The director will conduct an initial assessment for you. If using WeChat is not convenient for you, you can also make an appointment through the BeautsGO platform.
👨⚕️ The three directors of Diar Dermatology each have their own areas of expertise.
1️⃣ Dean Liu Zhuangxi – An expert in anti-aging and lifting treatments
With 26 year
s of clinical experience, he graduated from the School of Medicine of Hanyang University and has previously served as a specialist physician and visiting professor at Baiyi Hospital. He specializes in HIFU and Thermage-based photothermal lifting treatments; his techniques are precise and effective, with short recovery periods.
2️⃣ Director Zhang Huizhen — An expert in injections and skin management
With 21 years of clinical
experience, she is a specialist in Dermatology who has also studied at the Faculty of Medicine of Oita University in Japan. She specializes in treatments such as Rejuran and Filler injections, as well as skin barrier repair and management. During consultations, she is particularly attentive and does not aggressively promote expensive treatments.
3️⃣ A dermatology specialist and the director of the clin
ic: Specializing in post-treatment recovery and long-term skin management plans, they will design a systematic treatment program tailored to your skin type—something that doesn’t end after just one session.
⚠️ What should you prepare before going to Diar Dermatology?
In addition to the basic booking process and pre-operative preparations, there are several specific precautions regarding the Rejuran series that I must remind everyone about:
🧬 The 72-hour period after Rejuran treatment is a critical stage – during this time, the skin begins to activate its regeneration process. It is essential to avoid hot water, saunas, and strenuous exercise. In the days following my HB treatment, I stayed in the hotel and only applied the repair cream provided by the hospital; even the facial masks I used were those brought back from the clinic. Many people rush out to go shopping too soon after the procedure, which only prolongs their recovery time – and it’s really not worth it.
💧 Moisturization is even more important than you might think. After applying Rejuran, your skin will become particularly dry. It is recommended to use the medical repair mask twice a day for the first three days, and then once a day for the following week. Proper moisturization will help maintain the effects of Rejuran for a longer time – don’t skimp on this.
🍎 Diet is also important after the procedure – avoid spicy foods, alcohol, and seafood for at least a week, as these can exacerbate swelling and inflammation. Drink plenty of water and consume fruits rich in vitamin C to help your skin heal. During those days, I mainly ate light Korean porridge and fruits, and my recovery was quite fast.
📋 1. Make an appointment in advance – at least 1–2 weeks in advance. It’s most convenient to add me on WeChat at s-sourire. Clearly state the treatment you would like to undergo, and our customer service staff will arrange for the corresponding director to handle your case.
🧪 2. Pre-treatment preparations: Stop taking aspirin and vitamin E one week before the procedure; avoid excessive sun exposure one week prior to any phototherapy treatment; women should avoid their menstrual period. These are all basic requirements; otherwise, the procedure may not be able to be carried out on that day.
💵 3. Budget guidelines: For hyaluronic acid treatments, the cost ranges from 150,000 to 300,000 Korean won; for injection treatments, it is between 200,000 and 600,000 Korean won; for photothermal treatments, the cost ranges from 200,000 to 550,000 Korean won. It is recommended to budget an additional 20% for these treatments.
🩹 4. Recovery after Rejuran HB treatment: The swelling subsides within 1–2 days for the “black box” formula, and within 2–3 days for the HB formula. In the first two days, avoid wearing makeup and contact with hot water; also, strictly protect your skin from sunlight for at least one week. Starting from the third day, you can wear light makeup when going out.
🛫 5. Itinerary Planning – If you choose to undergo HB, it is recommended to reserve 3 days for recovery; 2 days are sufficient for the “black box” procedure. Schedule the medical treatments in the first half of your itinerary, and allow yourself enough time to recover in the following days.
❓ Frequently Asked Questions
🤔 Q: How soon after Rejuran HB treatment can one go out in public nor
mally?
✅ A: For most people, the swelling subsides within 2-3 days, and they can go out with light makeup on the third day. If your skin is more sensitive, it may take 4-5 days.
😤 Q: Is HB really better than the “black box” option?
✅ A: Not nec
essarily. If you only have mild signs of aging, the “black box” option is sufficient. The advantage of HB lies in its immediate filling effect and longer-lasting results, but the recovery period is also longer. It is recommended to let the clinic director assess the situation during a face-to-face consultation.
🤷 Q: Diar is a new clinic – is it reliable?
✅ A: Although it
didn’t open until the end of 2025, all three directors have over 20 years of experience and have previously worked in large hospitals. The equipment they use is also of the latest generation. In my opinion, they are even more committed than some older clinics.
🛂 Q: Is Chinese-language service available?
✅ A: Y
es, we provide Chinese translation services throughout the entire process. You can also make an appointment via WeChat and communicate in Chinese directly.
💳 Q: Can I use a credit card to pay?
✅ A: Credit cards and mobile payments are accepted. It is recommended to bring some cash as a backup.
📝 Disclaimer
The content of this article is for reference only and does not constitute medical advice. The results of cosmetic procedures vary from person to person, and the prices and treatment details mentioned in this article may change at any time. Please refer to the current rates provided by the clinic on the day of your consultation. Before undergoing any cosmetic procedure, it is essential to communicate thoroughly with your doctor and understand the potential risks involved.
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