4-in-1 Face Serum – Hyaluronic Acid, Niacinamide & Vitamins

Elevate your daily skincare routine with the RDQCTQ 4-in-1 Face Skin Care Serum — a powerhouse formula that combines Hyaluronic Acid, Niacinamide, and essential Vitamins into one lightweight, multi-action serum. Designed for all genders and all skin types, this serum works to deeply hydrate, firm, smooth, and visibly rejuvenate your complexion in one easy step.

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

• Deep Hydration: Hyaluronic Acid draws moisture deep into the skin layers, leaving your face plump, supple, and visibly refreshed throughout the day.
• Brightening & Barrier Support: Niacinamide (Vitamin B3) helps improve skin's natural barrier function, visibly evens skin tone, and enhances overall radiance.
• Vitamin-Rich Nourishment: A blend of essential vitamins nourishes and energises skin for a healthy, luminous glow.
• Firming & Smoothing: The serum's firming complex helps minimise the appearance of fine lines and wrinkles, supporting a more youthful-looking complexion over time.
• 4-in-1 Multi-Action Formula: One serum does it all — deep moisturisation, firming, anti-wrinkle, and age-defying benefits in every drop.
• Unisex Formula: Formulated for both men and women who want effective, fuss-free skincare.

Key Ingredients

• Hyaluronic Acid – Intense, long-lasting hydration
• Niacinamide (Vitamin B3) – Visibly brightens and strengthens the skin barrier
• Multi-Vitamin Complex – Nourishes and revitalises for a healthy glow

Product Specifications

• Brand: RDQCTQ
• Model: RD004
• Available Sizes: 40ml / 60ml
• Formulation: Oil-based Serum
• Gender: Unisex
• Shelf Life: 3 Years
• Certification: CPNP
• Country of Origin: Made in China

How to Use

1. Cleanse and tone your face as usual.
2. Apply 2–3 drops of serum to fingertips.
3. Gently press and smooth onto face and neck.
4. Follow with your favourite moisturiser. Use morning and/or evening for best results.

Explore More Skincare Essentials

Complete your routine with these related products:

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

Authoritative Skincare Resource

For general skincare guidance and ingredient information, visit the U.S. Food & Drug Administration – Cosmetics resource page.

Frequently Asked Questions

Q: What skin types is this 4-in-1 Hyaluronic Acid Niacinamide Serum suitable for?

A: This serum is formulated for all skin types — including dry, oily, combination, and sensitive skin. Its unisex, lightweight formula absorbs quickly without clogging pores, making it suitable for everyday use for both men and women.

Q: How does Niacinamide benefit the skin in this serum?

A: Niacinamide (Vitamin B3) is a well-researched skincare ingredient that helps strengthen the skin's natural moisture barrier, visibly even out skin tone, and enhance overall radiance. Combined with Hyaluronic Acid, it delivers both hydration and a more luminous complexion.

Q: Can I use this serum with my existing moisturiser or sunscreen?

A: Yes! Apply the serum after cleansing and toning, then layer your moisturiser or SPF product on top. This serum is designed to complement your existing skincare routine as a hydrating and firming base step.

Q: What size options are available?

A: The RDQCTQ 4-in-1 Face Serum is available in both 40ml and 60ml sizes, giving you the flexibility to choose the option that suits your routine and budget.