Vitamin C Firming Face Serum – Hydrating Day & Night Essence

Reveal a brighter, more radiant complexion with the RDQCTQ Vitamin C Firming Skin Essence. Enriched with a potent blend of stabilized Vitamin C and plant-derived amino acids, this lightweight lotion-serum works around the clock to deeply hydrate, visibly firm, and promote a luminous, even-toned glow — morning and night.

* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Why You'll Love It

• Vitamin C Brightening Complex: Helps visibly diminish dullness and supports a more even, glowing skin tone with regular use.
• Plant Amino Acid Formula: Nourishes and replenishes the skin's moisture barrier, leaving skin feeling soft, supple, and comfortable all day.
• Day & Night Hydration: Versatile formula suitable for use both morning and evening, seamlessly fitting into any skincare routine.
• Firming & Lifting Effect: Promotes a firmer, more youthful-looking complexion over time.
• Lightweight Lotion Texture: Fast-absorbing and non-greasy, perfect as a base under moisturizer or makeup.
• Unisex Formula: Suitable for all skin types and genders.
• No High-Concern Chemicals: Formulated without high-concern chemical ingredients for a cleaner, more conscious skincare choice.

Product Specifications

• Brand: RDQCTQ
• Model: RD110
• Formulation: Lotion (Essence/Serum)
• Item Type: Face Serum
• Gender: Unisex
• Shelf Life: 3 Years
• Pieces: 1 Unit
• Made in China

How to Use

1. Apply a small amount to clean, dry skin on the face and neck.
2. Gently pat and massage the essence into the skin using upward circular motions.
3. Follow with your favourite moisturizer. Use morning and/or evening for best results.

Pair It With

Complete your glow-up routine with these related picks from our store:

• 0.3ml & 0.5ml Ampoule Head Cap Adapter for Hyaluronic Pen
• 0.3ml & 0.5ml Hyaluron Pen Ampoule Head Cartridge | Skin Care

Expert Skincare Reference

Want to learn more about how antioxidants like Vitamin C support skin health? Visit the National Library of Medicine – Vitamin C and Skin Health for science-backed insights.

Learn more: K-beauty

Frequently Asked Questions

Q: Can I use this Vitamin C face serum both morning and night?

A: Yes! This essence is specifically formulated for day-and-night use. Apply it after cleansing and before moisturizer as part of both your AM and PM skincare routines for best hydration and brightening results.

Q: Is this serum suitable for sensitive or combination skin?

A: The RDQCTQ Vitamin C Firming Essence is designed for unisex, all-skin-type use and contains no high-concern chemicals. If you have particularly sensitive skin, we recommend doing a patch test on a small area first before full facial application.

Q: How long before I can expect to see visible results?

A: With consistent daily use, most users begin to notice a more hydrated, radiant, and firmer-looking complexion within 4–6 weeks. Results may vary depending on skin type and individual routine.

Q: What makes the plant amino acid formula beneficial for skin?

A: Plant-derived amino acids help replenish and support the skin's natural moisture barrier, keeping skin feeling nourished, plump, and resilient against environmental stressors throughout the day and night.