Premium Hyaluronic Acid Serum (Gokujyun Premium)
7 types of hyaluronic acid for deep hydration
Key Ingredients
How It Works
Hyaluronic acid (HA) is a glycosaminoglycan of glucuronic acid/N-acetylglucosamine disaccharide repeats, holding ~1,000x its weight in water. High-MW HA (>1,000kDa) forms a viscoelastic film reducing TEWL. Medium-MW HA (100-1,000kDa) penetrates upper stratum corneum. Low-MW HA (<100kDa) and nano-HA (<10kDa) reach deep stratum corneum, improving keratinocyte hydration. Multi-layer approach provides both immediate moisture sensation and sustained deep hydration.
How to Use
After cleansing and toner, apply 2-3 drops to slightly damp skin with gentle pressing. Avoid applying to dry skin as it may draw moisture out. Always seal with cream or oil afterwards.
Expected Results
Immediate plumping and hydration sensation. Fine lines from dehydration less visible at 1-2 weeks. After 4+ weeks, sustained stratum corneum hydration improvement and strengthened barrier.
Scientific Evidence
Precautions
In dry environments (<40% humidity), HA may draw moisture from skin instead of air. Always seal with cream/oil in dry conditions. Store at room temperature away from direct sunlight.
Related Professional Treatments
Professional treatments that pair well with this home care product.
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Combining home care with clinic treatments can deliver more effective results