Clinical Specification
Bellast Soft L Cross-linked Hyaluronic Acid Dermal Filler
18mg/ml medical-grade HA formulation integrated with 0.3% Lidocaine Hydrochloride. Engineered via Double Polymerization Technology for superior 3D matrix stability and precise superficial dermis integration. Manufactured under standards by Dongkook Pharma (Est. 1987) with quality-assured facility compliance.
Medically Reviewed | Clinical Data Verified | Batch Traceability Active
Physicochemical Properties
• HA Concentration: 18mg/ml
• Lidocaine HCl: 0.3% (w/v)
• Particle Size: 300-500μm
• pH Level: 6.8 – 7.4
• Osmolarity: 290-310 mOsm/kg
Safety & Purity Metrics
• BDDE Residual: <0.5ppm
• Endotoxin Level: <0.5 EU/ml
• HA Purity: 99.2% (HPLC)
• Cross-linking Degree: 4-6%
• Origin: Non-animal bio-fermentation
Clinical Administration Protocol
Target Indication: Superficial rhytids, perioral lines, fine dermal depressions.
Injection Depth: Mid-to-superficial dermis (1.5mm – 2.0mm).
Apparatus: 30G ½ ultra-thin wall (included: 1.0ml Luer Lock ).
Technique: Linear retrograde threading, serial puncture, or fan technique.
Efficacy & Durability
• WSRS Improvement: 98.7% patient satisfaction at week 12 (n=150).
• Estimated Duration: 9 to 12 months based on tissue metabolism.
• Degradation: Isovolumetric degradation profile.
Strict Contraindications
Contraindicated in patients with severe allergies, history of anaphylaxis, bleeding disorders, hypersensitivity to lidocaine, or pregnant/breastfeeding individuals. Not indicated for deep nasolabial folds or intravascular injection.
Handling & Storage
Store strictly between 2°C and 25°C. Do not freeze. Protect from direct sunlight. Shelf life is 36 months from the date of manufacture. Device warranty is void if package seal is compromised.

Sophia Martinez –
I love how Bellast Soft L doesn’t give that “frozen face” effect. The Double Polymerization Tech really works—my skin looks plump but still moves naturally. The 18mg/ml HA concentration is perfect for subtle corrections. I used a 30G needle, and the injection was smooth. My perioral lines are way less noticeable now. Highly recommend for a fresh!
Emily Thompson –
I’ve tried a few hyaluronic acid fillers, but Bellast Soft L is hands-down the best for fine lines. The 0.3% lidocaine makes it practically painless—I barely felt a thing! I used it on my crow’s feet, and within days, the wrinkles looked softer. The texture is smooth, and it blends naturally. The syringe is easy to handle, and the results last!