• Orange skincare serum container with 'skinfix' branding on a white background
  • White cream serum swatch on a white background
  • Orange container of Skinfix Vitamin C with a small amount of cream being squeezed out, on a white background.
  • Close-up of a person applying cream to their cheek with on-image clinical claims about brighter-looking skin, reduced wrinkles, and gentle results.
  • Before and after comparison of dark spots and wrinkles on skin with text about clinical validation.
  • Before and after comparison of vitamin c serum with text about product effectiveness.
  • Before and after comparison of a face with blemishes, showing improvement over 4 weeks after using vitamin c serum.
  • Skinfix AM and PM skincare routine featuring Foaming Oil Cleanser, Brighten + Firm Vitamin C Serum, and Triple Lipid-Peptide Cream.
  • Ingredients overview for Skinfix Brighten + Firm Vitamin C Serum highlighting THD ascorbate, peptide solutions, glycerin, and antioxidant blend.
  • Diagram comparing oil-soluble vitamin C used in Skinfix Brighten + Firm serum with water-soluble vitamin C, illustrating differences in skin penetration.
  • Side-by-side image of current and new Skinfix Brighten + Firm 15% Vitamin C Serum packaging, noting a new look with the same clinical formula.
New

Brighten + Firm 15% Vitamin C Serum

Visibly fade dark spots and lines in just 1 month with this breakthrough formula, which pairs THD Ascorbate—a gentle yet potent form of vitamin C—with two advanced peptides to brighten better and firm faster.

Benefits

  • Blue hand drawn icon that represents firms
    Brightens
  • Blue hand drawn icon that represents firms
    Firms
  • Hydrates
Size

Get 2 free samples with all orders

Free shipping on all orders

Brighten + Firm 15% Vitamin C Serum

  • Orange skincare serum container with 'skinfix' branding on a white background
  • White cream serum swatch on a white background
  • Orange container of Skinfix Vitamin C with a small amount of cream being squeezed out, on a white background.
  • Close-up of a person applying cream to their cheek with on-image clinical claims about brighter-looking skin, reduced wrinkles, and gentle results.
  • Before and after comparison of dark spots and wrinkles on skin with text about clinical validation.
  • Before and after comparison of vitamin c serum with text about product effectiveness.
  • Before and after comparison of a face with blemishes, showing improvement over 4 weeks after using vitamin c serum.
  • Skinfix AM and PM skincare routine featuring Foaming Oil Cleanser, Brighten + Firm Vitamin C Serum, and Triple Lipid-Peptide Cream.
  • Ingredients overview for Skinfix Brighten + Firm Vitamin C Serum highlighting THD ascorbate, peptide solutions, glycerin, and antioxidant blend.
  • Diagram comparing oil-soluble vitamin C used in Skinfix Brighten + Firm serum with water-soluble vitamin C, illustrating differences in skin penetration.
  • Side-by-side image of current and new Skinfix Brighten + Firm 15% Vitamin C Serum packaging, noting a new look with the same clinical formula.

1 oz

Brighter, firmer-looking skin in just 1 month—without irritation.

Brighter, firmer-looking skin in just 1 month—without irritation.

Woman looking into camera applying Skinfix Brighten + Firm Vitamin C Serum to right cheek.
  • Do No Harm
    Details
    • Accepted by the National Eczema Association
    • Clinically Tested
    • Dermatologist Tested
    • Safe for Sensitive Skin
    • Non-Comedogenic
    • Hypoallergenic
    • Vegan
    • Cruelty-Free
  • Do No Harm
    Details
    • Accepted by the National Eczema Association
    • Clinically Tested
    • Dermatologist Tested
    • Safe for Sensitive Skin
    • Non-Comedogenic
    • Hypoallergenic
    • Vegan
    • Cruelty-Free
  • Ingredients
    15% Tetrahexyldecyl Ascorbate

    An ultra-potent and stable form of vitamin C that visibly brightens + firms

    2% Tetrapeptide Solution

    Biomimetic peptides that visibly reduce dark spots and discoloration

    2% PGA Peptide Solution

    Peptides that hold up to 5000x their weight in water to restore bounce

    1% AOX Blend

    Ferulic acid, vitamin E, and turmeric polyphenols protect formula potency

    5% Glycerin

    A powerful humectant that delivers hydration to the skin barrier and creates visibly plump, dewy skin.

  • Ingredients
    15% Tetrahexyldecyl Ascorbate

    An ultra-potent and stable form of vitamin C that visibly brightens + firms

    2% Tetrapeptide Solution

    Biomimetic peptides that visibly reduce dark spots and discoloration

    2% PGA Peptide Solution

    Peptides that hold up to 5000x their weight in water to restore bounce

    1% AOX Blend

    Ferulic acid, vitamin E, and turmeric polyphenols protect formula potency

    5% Glycerin

    A powerful humectant that delivers hydration to the skin barrier and creates visibly plump, dewy skin.

  • How to Use
    Day + Night
    • Apply 1-2 pumps to clean, dry skin after cleansing. Follow with your moisturizer and sun protection.
    • Safe to use twice a day, every day–even when first starting out
    Good to Know

    Even though Brighten + Firm Vitamin C serum is NEA-accepted, we don't recommend using it during an active eczema flare. Wait until your skin has calmed down before resuming use.

  • How to Use
    Day + Night
    • Apply 1-2 pumps to clean, dry skin after cleansing. Follow with your moisturizer and sun protection.
    • Safe to use twice a day, every day–even when first starting out
    Good to Know

    Even though Brighten + Firm Vitamin C serum is NEA-accepted, we don't recommend using it during an active eczema flare. Wait until your skin has calmed down before resuming use.

See in Action
  • Before Close-up of an person's face with wrinkles and skin texture highlighted.
    After Close-up of a person's face with improved texture and firmer skin
  • Before Close-up of a person’s cheek with visible dark spots and uneven skin tone highlighted by a dotted circle.
    After Close-up of a person's eye and forehead with visibly improved skin texture.
  • Before Close-up of a person's face with visible blemishes on the skin.
    After Close-up of a person's face with visibly less blemishes on the skin and brighter skin.
  • Before Close-up of a person's face with circles highlighting skin texture and dark spots
    After Close-up of a person's face with visibly less texture and brighter skin

Clinical Results

Clinically proven to reduce the look of dark spots and wrinkles, with results that keep improving over time.
Results of an 8 week clinical trial with 32 participants, analyzed with ImagePro® software.

  • 100% saw their fine lines and wrinkles improved, by an average of 22% after one month and 32% after two

    Results of an 8 week clinical trial with 32 participants, analyzed with ImagePro® software.

  • 100% said it was gentle on skin—even with twice-daily use over two months

    Results of an 8-week consumer perception study with 32 participants, after 8 weeks.

  • 97% saw brighter and more naturally radiant skin, with no new discoloration over two months

    Results of an 8-week consumer perception study with 32 participants, after 8 weeks.

  • 91% said it delivered better results than competing serums

    Results of an 8-week consumer perception study with 32 participants, after 8 weeks.

Environmental

Reducing our impact is important to us

We partnered with Bluebird to complete a full Life Cycle Analysis on the carbon and waste impact of this product.

Reducing our impact is important to us

We partnered with Bluebird to complete a full Life Cycle Analysis on the carbon and waste impact of this product.

Production

Made in North America with ethical labor practices

Box

100% FSC certified paper made with 30% recycled fibres and plant-based inks

Partners
Learn more about our sustainability commitments
  • Orange rectangular object with a textured top on a white background
    Pump

    Check locally for recyclability of all plastic pumps or place in PACT collective bin here

    Packaging Facts

    100% plastic -- no metal spring. 90% PP, 10% PE

  • Orange rectangular object on transparent background
    Cap

    Place in recycle bin

    Packaging Facts

    50% PCR PP

  • Icon of orange box on transparent background
    Box

    Place in recycle bin

    Packaging Facts

    100% FSC certified paper made with 30% recycled fibres and plant-based inks
Orange skincare serum bottle with 'skinfix' branding on a white background

FAQ

  • What skin types is this serum suitable for?

    This formula is safe for all skin types—dry, oily, sensitive, and everything in between. It's non-comedogenic, which means it shouldn't clog pores. And it's even accepted by the National Eczema Association, which means it's been vetted for sensitive, eczema-prone skin.

  • Can I combine vitamin C with other active ingredients (retinol, AHAs, niacinamide, etc.)?

    You can—but you might not need to. Each pump delivers vitamin C, peptides, humectants, and antioxidants—doing the work of several serums in one. If you still want to use retinol or acids, alternate: vitamin C in the morning, those at night.

  • Is this vitamin C serum OK for daily use long-term, or should I cycle it?

    You can absolutely use it daily. It's made to be gentle enough for consistent, long-term use—even if you're sensitive.

  • Is this safe to use during pregnancy and breastfeeding?

    Vitamin C is generally considered safe to use during pregnancy and breastfeeding, but if you have specific concerns, it's always a good idea to check with your doctor.

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