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Serum Twenty

Serum Twenty

Serum Twenty contains 20% Vitamin C (L-Ascorbic Acid) and is the highest concentration of Vitamin C clinically tested to penetrate the skin. Serum Twenty greatly reduces the appearance of fine lines and wrinkles and provides potent antioxidant properties against environmental factors, while refining skin texture.

Size

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How to Use

Apply a few drops to face, neck, and chest after cleansing, then gently massage until fully absorbed. Follow with moisturizer.

Benefits

Visibly smooths fine lines, evens skin tone, and restores a brighter, more radiant complexion

Clinical Result

Participants: 25 females and 5 males, 35-59 years old

• 100% reported enhanced skin elasticity (2 weeks)
• 100% saw improvement in fine lines (2 weeks)
• 100% experienced reduced crow's feet (2 weeks)
• 100% reported faded facial color spots (2 weeks)
• 97% reported diminished forehead wrinkles (2 weeks)
• 100% felt reduced skin dullness and even tone (2 weeks)

Ingredients

Water, Sodium Hyaluronate, L-Ascorbic Acid, Zinc Sulfate, Bioflavonoids, Phenoxyethanol.

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Ingredients Clinical Studies Comparison Faq Reviews
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  • This is honestly the ONLY effective Vit C serum I have used, it reduced my dark spots from acne and skin pigmentation! Been using this for a month and already see amazing results plus haven’t had any new breakouts!! My face looks a lot brighter and radiant, worth the try you will not regret it!!

    Isra A.

    Verified Customer
Backed by Science

Advanced Antioxidant Defense

Clinically tested with the highest concentration of L-ascorbic acid (20%) proven to penetrate the skin, Serum Twenty helps improve the appearance of fine lines, wrinkles, and uneven tone while providing powerful protection against environmental stressors.

Full Ingredients List
Water, Sodium Hyaluronate, L-Ascorbic Acid, Zinc Sulfate, Bioflavonoids, Phenoxyethanol.

  • 20% L-Ascorbic Acid (Vitamin C)

    A potent form of pure Vitamin C clinically tested to penetrate skin, reducing the look of fine lines, wrinkles, and uneven tone.

    Benefits

    Brightens, smooths, evens tone, protects

  • Hyaluronic Acid

    A powerful hydrator that draws moisture into the skin, helping maintain plumpness, smooth texture, and lasting hydration.

    Benefits

    Hydrates, plumps, smooths, softens

  • Zinc Sulfate

    A mineral complex that supports skin clarity and balance, helping calm visible redness and promote a healthy-looking complexion.

    Benefits

    Soothes, balances, calms, refines

Full Ingredients List
Water, Sodium Hyaluronate, L-Ascorbic Acid, Zinc Sulfate, Bioflavonoids, Phenoxyethanol.
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Ingredients
Water, Sodium Hyaluronate, L-Ascorbic Acid, Zinc Sulfate, Bioflavonoids, Phenoxyethanol.

  • Nice serum for this weather in Phoenix, feels lush and that my skin absorbed it nicely.

    – Monica M.

    Verified Customer

How To Use

  • How To Use

    Apply a few drops to face, neck, and chest after cleansing, then gently massage until fully absorbed. Follow with moisturizer.

  • When To Use

    Use daily, morning and/or night. Apply in the morning for antioxidant protection and at night to support skin renewal.

  • Texture

    Lightweight serum that absorbs quickly, leaving skin smooth and refreshed without residue.

Clinically tested

What The Studies Say

  • Subject Scale 30 subjects
  • Sex 25 females and 5 males 
  • Age 35-59 years old 
  • Region Tested Face

No discomfort reported by any subjects

The difference is clear

Better Ingredients. Better Results.

    • Clinical grade actives
    • Science-backed formulas
    • No fluff, just results
    • Minimal, proven ingredients
  • OTHER BRANDS
    • Generic extracts
    • Trendy ingredients
    • Marketing over efficacy
    • Overloaded formulations

Skin-First Formulas

Backed By Science, Not Hype

When I first stabilized vitamin C in liquid form in 1995, the world believed it was impossible. That breakthrough not only transformed skincare, it became the foundation on which Phyto-C was built — a company that grew from my small lab in New Jersey to serving more than 35 countries worldwide.

From the beginning, my mission has been clear: to create formulas rooted in science, powered by nature, and uncompromising in their integrity. Each product is backed by decades of clinical research, crafted with medical-grade ingredients, and made in fresh micro-batches to ensure purity and potency.

Today, my son, Dr. Eddie Omar, carries this legacy forward. He leads Phyto-C with the same values I began with — an unwavering dedication to science, innovation, and results that endure.

– Dr. Mostafa Omar
Phyto-C Founder and Inventor of Stabilized Topical Vitamin C

    Still Curious?

    Frequently Asked Questions

    Is Serum Twenty suitable for all skin types?

    Yes, Serum Twenty is formulated for normal, combination, and mature skin. Those with sensitive skin may want to start with every other day use.

    Can Serum Twenty be used with other Vitamin C products?

    We recommend using only one Vitamin C serum at a time to avoid irritation and ensure optimal results.

    Can I use Serum Twenty with retinol?

    Yes, but we suggest using Vitamin C in the morning and retinol at night to minimize sensitivity.

    How long until I see results?

    Many users notice brighter, smoother skin within 4–6 weeks of consistent use.

    How should I store Serum Twenty?

    Store at room temperature away from direct sunlight. Some users prefer refrigeration to maintain freshness.

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