Vitamin C & Retinol Face Serum – Brighten & Smooth Skin

Reveal a brighter, smoother, and more radiant complexion with the TRSTAY Vitamin C + Retinol Super Serum. This powerhouse formula combines 20% Vitamin C and 2.5% Retinol to target uneven skin tone, dullness, and rough texture — leaving your skin visibly luminous and deeply nourished. Suitable for all skin types and genders, this lightweight oil-based serum absorbs beautifully without greasiness.

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

• 20% Vitamin C: A potent antioxidant that promotes a brighter, more even-toned complexion and helps shield skin from environmental stressors.
• 2.5% Retinol: A clinically studied concentration that supports skin cell renewal, helping to visibly minimize the appearance of fine lines and texture over time.
• Deep Moisturizing Formula: Oil-based formulation locks in hydration, leaving skin feeling soft, supple, and deeply conditioned.
• Brightening & Smoothing: Regular use helps promote a clearer, more luminous skin surface with a noticeably smoother feel.
• Unisex Formula: Designed to work for all skin types and genders — a versatile addition to any skincare routine.

Key Ingredients

• 20% Vitamin C (Ascorbic Acid) – brightens and antioxidant protection
• 2.5% Retinol – supports cell turnover and skin renewal
• Moisturizing oil base – seals in hydration for long-lasting softness

Available Sizes

• 5ml | 15ml | 30ml | 50ml — choose the size that suits your routine

How to Use

1. Cleanse your face thoroughly and pat dry.
2. Apply a few drops of serum to fingertips and gently press onto face and neck.
3. Allow to absorb fully before applying moisturizer or SPF.
4. For best results, use in your evening routine (retinol can increase sun sensitivity — always apply SPF in the morning).
5. Begin with 2–3 times per week and increase frequency as your skin adjusts.

Product Specifications

• Brand: TRSTAY
• Formulation: Oil
• Gender: Unisex
• Pieces: One Unit
• Made in: Mainland China

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Authoritative Resource

For more information on retinol and Vitamin C in skincare, visit the U.S. Food & Drug Administration – Cosmetics Information.

Frequently Asked Questions

Q: Can I use this Vitamin C and Retinol serum together in the same routine?

A: Yes! This serum is formulated to combine both 20% Vitamin C and 2.5% Retinol in a single convenient product. For best results, apply it in the evening and follow with a moisturizer. Always use sunscreen during the day, as retinol can make skin more sensitive to sunlight.

Q: Which size should I choose — 5ml, 15ml, 30ml, or 50ml?

A: If you're trying this Vitamin C Retinol serum for the first time, the 5ml or 15ml sizes are a great way to start. For regular, daily use, the 30ml or 50ml sizes offer better value and keep your skincare routine uninterrupted.

Q: Is this face serum suitable for sensitive skin?

A: The serum is formulated for unisex use and all skin types. However, if you have sensitive skin, we recommend starting with 2–3 applications per week to allow your skin to gradually adjust to the retinol and high-concentration Vitamin C before using it more frequently.

Q: How long before I see results from this brightening serum?

A: Most users begin to notice a brighter, smoother complexion within 4–8 weeks of consistent use. For best results, incorporate the serum into your nightly skincare routine and be sure to apply SPF moisturizer during the day.