ISNTREE HYPER VITAMIN C 23 SERUM 20ml

Isntree Hyper Vitamin C 23 Serum is a high-strength brightening treatment for dullness, uneven tone and visible signs of environmental stress. It is built on 23% pure L-ascorbic acid, the most researched but most unstable form of vitamin C, supported by a secondary stabilized derivative and soothing ingredients.

Key Benefits

• Ascorbic Acid at 23% delivers concentrated antioxidant, brightening care.
• Ethyl Ascorbyl Ether adds a more stable secondary vitamin C form.
• Betula Platyphylla Japonica (Birch) Juice supports hydration alongside the active.
• Panthenol and adenosine help balance comfort and support skin resilience.
• Tocopherol (vitamin E) provides antioxidant support that complements vitamin C.

When to Use

Use once daily to start — morning or evening, after toner and before moisturizer — increasing to twice daily only if skin tolerates the high vitamin C concentration well. Wear sunscreen every morning, since brightening routines pair best with sun protection.

How to Use

Apply 2–3 drops to clean, toned skin. Spread over the face and neck, pat until absorbed, then follow with moisturizer. Store away from light and heat and use within a few months of opening, since concentrated L-ascorbic acid oxidizes readily.

Key Ingredients

• Ascorbic Acid (L-Ascorbic Acid, Vitamin C) — the documented 23% concentration, the pure and most active form of vitamin C.
• Ethyl Ascorbyl Ether — a more stable secondary vitamin C derivative.
• Betula Platyphylla Japonica Juice (Birch Juice) — a hydrating botanical extract.
• Panthenol (Provitamin B5) — a soothing humectant.
• Adenosine — a wrinkle-care active.
• Tocopherol (Vitamin E) — an antioxidant that helps support vitamin C.

Precautions

For external use only. Patch test before first use — a high 23% concentration of pure ascorbic acid can cause tingling, stinging or redness, especially in sensitive skin. Introduce gradually, avoid direct eye contact, and discontinue use if persistent irritation occurs. The formula may oxidize and change color with air, light or heat exposure over time; a strong color change is a sign to replace the product.