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SKINREQUISITE

Vitamin C 18% Booster Serum

Sale price$58.00

Pure L-Ascorbic Acid for Radiance, Resilience & Defense

A high-potency Vitamin C booster serum formulated with 18% pure L-ascorbic acid, the most biologically active and effective form of vitamin C for the skin. This advanced antioxidant treatment is designed to visibly brighten, smooth, and strengthen the skin while defending against environmental stressors that accelerate visible aging.

Lightweight and fast-absorbing, this booster is suitable for all skin types when used as directed and is designed to layer seamlessly into any routine.

Key Benefits

  • Visibly improves skin brightness and radiance

  • Helps reduce the appearance of fine lines and wrinkles

  • Supports firmer-looking, more elastic skin

  • Helps improve uneven tone and discoloration

  • Smooths skin texture and refines appearance

  • Provides antioxidant defense against pollution and free radicals

  • Supports clearer-looking, calmer skin

Why It Works

Vitamin C (L-Ascorbic Acid – 18%)
The gold-standard form of vitamin C, L-ascorbic acid is a powerful antioxidant that helps support collagen production, improve skin tone, and protect against oxidative stress caused by UV exposure and pollution.

Glutathione
A potent antioxidant that supports skin brightness, smoothness, and overall skin clarity while helping counter visible signs of aging.

Ferulic Acid + Vitamin E
This clinically recognized antioxidant combination enhances stability and efficacy while providing additional protection against environmental damage.

Vitamin A (Beta-Carotene & Retinyl Palmitate)
Supports skin renewal and smoothness while contributing to a more refined complexion.

Mineral & Skin-Support Complex
Zinc, calcium, magnesium, glucosamine, and MSM help support skin resilience, hydration, barrier function, and overall skin health.

Why L-Ascorbic Acid Matters

Not all vitamin C is created equal.

This formula uses pure L-ascorbic acid, the form shown to be most effective for the skin, unlike vitamin C derivatives or esters that offer limited conversion and activity.

What to look for in a true vitamin C serum:

  • ✔ L-Ascorbic Acid (10–20%)

  • ✔ Vitamin E + Ferulic Acid

  • ✔ Air-tight, light-protected packaging

This formula meets all three criteria.

Who It’s For

  • Dull or uneven skin tone

  • Fine lines and early signs of aging

  • Hyperpigmentation or discoloration

  • Environmentally stressed skin

  • Acne-prone or redness-prone skin

  • All skin types seeking high-performance antioxidant care

How to Use

Apply 2–3 sprays to clean face and neck before serums and moisturizer.
Allow to fully absorb before layering additional products.

• Use AM and/or PM
• Always wear sunscreen when using vitamin C during the day

Ingredients

Witch Hazel Hydrosol, L-Ascorbic Acid (Vitamin C), Tocopherol (Vitamin E), Glutathione, Vitamin A (Beta-Carotene & Retinyl Palmitate), Ferulic Acid, Zinc Gluconate, Glucosamine, Calcium, Magnesium, MSM, Food-Grade Propylene Glycol, Cane Sugar Alcohol (<1%), Palmarosa Essential Oil (Therapeutic Grade)

Product Care

Keep bottle airtight.
Store in a cool, dark place.
Best used within 6 months of purchase.
Discard if the serum turns amber, which indicates oxidation.

Size:
Vitamin C 18% Booster Serum Sale price$58.00

Frequently Asked Questions

What does an 18% Vitamin C serum do for the skin?
An 18% L-ascorbic acid serum helps visibly brighten dull skin, improve the look of uneven tone, and support collagen production for firmer, smoother-looking skin. It also provides powerful antioxidant protection against environmental stressors like UV exposure and pollution that contribute to premature aging.
Is 18% L-ascorbic acid too strong for sensitive skin?
When formulated correctly and layered properly, 18% L-ascorbic acid can be suitable for most skin types. Because this is a high-potency formula, we recommend introducing it gradually (2–3 times per week) and applying to dry skin before moisturizer. Always follow with SPF during daytime use.
Why is L-ascorbic acid better than vitamin C derivatives?
L-ascorbic acid is the most biologically active and clinically studied form of vitamin C. Unlike derivatives that require conversion in the skin (often with limited efficiency), pure L-ascorbic acid delivers direct antioxidant activity and visible brightening results when formulated at an effective concentration.
Why does this formula include Vitamin E and Ferulic Acid?
Vitamin E and ferulic acid are included to enhance the stability and performance of L-ascorbic acid. This clinically recognized antioxidant trio improves photoprotection, increases efficacy, and helps defend skin against free radical damage more effectively than vitamin C alone.
Can this serum help with hyperpigmentation and dark spots?
Yes. Consistent use helps improve the appearance of uneven skin tone and discoloration by supporting a more balanced, radiant complexion. Over time, skin appears brighter, clearer, and more refined.
How do I layer this Vitamin C booster in my routine?
Apply 2–4 drops to clean, dry skin in the morning before moisturizer. Allow it to fully absorb, then follow with SPF. It layers well under hydrators, barrier-support creams, and sunscreen. For advanced routines, it can be paired with peptides and hyaluronic acid.
How should a true vitamin C serum be packaged?
Effective L-ascorbic acid formulas should be packaged in air-tight, light-protected containers to help maintain potency and reduce oxidation. Exposure to air and light can degrade vitamin C and reduce performance.

Ultra-Concentrated Botanicals

Every ingredient serves a function. No fillers, no dilution, no trend-driven extras.

Barrier-First Philosophy

Healthy skin starts with barrier repair — not aggressive exfoliation or harsh actives.

No Harsh Irritants

Free from synthetic fragrance, unnecessary actives, and common sensitizers.

Small-Batch & Results-Driven

Crafted in controlled batches to preserve potency, freshness, and performance.