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Réactive+ Anti–Oxidant Serum - SPF 45

Réactive+ Anti–Oxidant Serum - SPF 45 is a daily face serum with broad-spectrum SPF 45 protection, priced at $130.00. It combines antioxidant defense with advanced sun protection to prevent premature aging, making it ideal for daytime skincare routines focused on anti-aging and UV defense.

$130.00

● In stock

Buy at SAYN Beauty →

Price and availability may change. Click to see current details on SAYN Beauty.

Key features

  • SPF 45 broad-spectrum protection
  • Antioxidant-rich formula
  • Advanced shield technology
  • Lightweight serum texture
  • Anti-aging support
  • Dermatologist-tested
  • 1 oz travel-friendly size

Pros

  • +Combines SPF and antioxidant benefits
  • +Fast-absorbing, non-greasy finish
  • +Supports long-term skin health
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Cons

  • Higher price point
  • Not mineral-based SPF

About Réactive+ Anti–Oxidant Serum - SPF 45

What is Réactive+ Anti–Oxidant Serum - SPF 45?

Réactive+ Anti–Oxidant Serum - SPF 45 is a high-performance daytime skincare solution from Sayn Beauty that merges potent antioxidant protection with broad-spectrum SPF 45. Designed to combat environmental stressors, this lightweight serum shields skin from UV damage and free radicals—two leading causes of premature aging. At 1 oz, the formula absorbs quickly, making it ideal for layering under makeup or wearing alone for a natural glow. It’s formulated for those who prioritize both sun protection and anti-aging benefits in a single step.

Key features

  • SPF 45 Protection — Delivers broad-spectrum defense against UVA and UVB rays.
  • Antioxidant-Rich Formula — Neutralizes free radicals from pollution and sun exposure.
  • Advanced Shield Technology — Enhances skin’s natural barrier against environmental damage.
  • Lightweight Serum Texture — Absorbs quickly without residue or greasiness.
  • Anti-Aging Support — Helps reduce the appearance of fine lines and photoaging.
  • Dermatologist-Tested — Suitable for daily use on most skin types.
  • 1 oz Travel-Friendly Size — Convenient for daily application and on-the-go touch-ups.

Who is Réactive+ Anti–Oxidant Serum - SPF 45 for?

This serum is ideal for adults seeking a high-SPF daily protector with anti-aging benefits. It suits individuals with normal to combination skin, especially those exposed to urban pollution or daily sun. It’s well-suited for professionals, outdoor enthusiasts, or anyone building a preventative skincare regimen. Not recommended for those allergic to sunscreen actives or seeking mineral-only SPF options.

How does Réactive+ Anti–Oxidant Serum - SPF 45 compare?

Unlike standard SPF moisturizers, this serum offers a dual-action formula with concentrated antioxidants and high sun protection in a lightweight format. It outperforms basic SPF lotions in anti-aging defense and layers more easily under makeup than heavy sunscreens. Compared to standalone antioxidant serums, it adds essential UV protection, reducing the need for multiple products. However, it may not replace a dedicated moisturizer for very dry skin types.

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Best use cases

  • Daily urban wear
  • Outdoor activity protection
  • Makeup base layer
  • Anti-aging prevention
  • Travel skincare
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Is Réactive+ Anti–Oxidant Serum - SPF 45 right for you?

Réactive+ Anti–Oxidant Serum - SPF 45 is best for individuals building a high-performance morning skincare routine. Ideal for ages 25+, especially those concerned with sun damage and early aging. No special skill needed—apply daily like a serum. Alternatives include separate antioxidant serums with SPF moisturizers, but this offers a streamlined solution for efficiency and efficacy.

How it compares: Compared to standard SPF moisturizers, this serum offers superior antioxidant protection and lighter texture. It integrates better than heavy sunscreens under makeup and provides more anti-aging benefits than basic daily SPF lotions.

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Frequently Asked Questions

What does Réactive+ Anti–Oxidant Serum - SPF 45 do?

It protects skin from UV damage with SPF 45 while neutralizing free radicals using antioxidants. This helps prevent premature aging and supports long-term skin health with daily use.

Does this serum work under makeup?

Yes, its lightweight, fast-absorbing formula layers well under foundation or tinted moisturizer without pilling or greasiness, making it ideal for daytime skincare routines.

How do I use Réactive+ Anti–Oxidant Serum - SPF 45?

Apply one pump to clean, dry face every morning. Use alone or under moisturizer. Reapply every two hours if exposed to direct sunlight for extended periods.

Is this product suitable for sensitive skin?

It’s dermatologist-tested and formulated for most skin types, but those with sunscreen sensitivities should patch test first, especially due to chemical SPF actives.

Can I use this serum at night?

While safe to use, it’s designed for daytime due to SPF content. At night, a dedicated antioxidant serum without SPF may be more appropriate.

How much does Réactive+ Anti–Oxidant Serum - SPF 45 cost?

Réactive+ Anti–Oxidant Serum - SPF 45 is $130.00 at SAYN Beauty. Prices may change — click through to SAYN Beauty for the latest.

Is Réactive+ Anti–Oxidant Serum - SPF 45 in stock at SAYN Beauty?

Yes, Réactive+ Anti–Oxidant Serum - SPF 45 is currently in stock at SAYN Beauty.

Specifications

SKU
D-NCT-000748-SB
Last updated May 14, 2026