• 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 orders over $50

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.
  • Details
    Details
    • Accepted by the National Eczema Association
    • Suitable for Sensitive Skin
    • Clinically Tested
    • Dermatologist Tested
    • Non-Comedogenic
    • Hypoallergenic
    • Vegan
    • Cruelty-Free
  • Details
    Details
    • Accepted by the National Eczema Association
    • Suitable for Sensitive Skin
    • Clinically Tested
    • Dermatologist Tested
    • 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.

    Free From

    × fragrance
    × essential oils
    × silicones
    × phthalates
    × microplastics
    × parabens
    × sulfates
    × PEGs
    × gluten

  • 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.

    Free From

    × fragrance
    × essential oils
    × silicones
    × phthalates
    × microplastics
    × parabens
    × sulfates
    × PEGs
    × gluten

  • 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.

  • Awards
    2026

    NewBeauty Beauty Awards - Best Vitamin C Serum for Sensitive Skin

  • Awards
    2026

    NewBeauty Beauty Awards - Best Vitamin C Serum for Sensitive Skin

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

  • 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.

Overall rating: 4.6072726 / 5 from 275 reviews.

AI Generated Review Summary

This 15% Vitamin C serum visibly fades dark spots and lines in a month, praised for its radiant glow, lightweight texture, and effective absorption. Customers also appreciate its gentle feel and noticeable improvement in skin appearance.

Summary topics

  • Packaging (10%): It was reported by customers that the packaging is gorgeous and easy to grab for those always on the go.
  • Glow (40%): A substantial number of customers remarked that this product gives a radiant and healthy glow to their skin.
  • Skin Appearance (40%): Many customers brought up how healthier and more awake their skin looks after using the product without any irritation.
  • Absorption (25%): Customers keep praising how this product absorbs well into the skin and feels light on the skin.
  • Texture (35%): A substantial number of customers appreciated the lightweight and non-greasy texture of the product.

Review topics: [feels, packaging, skin, issues, texture, absorbs, results, scent, looks, glow, spots, shipping, formula, irritation, improvement, price, face, consistency, complexion, serum, hydration, redness, ingredients, vitamin c, appearance, bottle, residue, difference, fragrance, benefits].

Review highlights

  • "The texture is lightweight and non-greasy, making it perfect for daily use even for sensitive skin." — Dayana D.
  • "I have used the Skinfix Target+ Brighten + Firm 15% Vitamin C Serum for the past month and my skin is looking fabulous." — Chaunci
  • "No overwhelming scents, and feels nice on my skin." — Savannah

Reviews

So far so good! I

"So far so good! I really enjoy this serum. The texture and smell are great. It's still in the first few weeks, so too early to know about the significance of its benefits, but so far it's been a positive experience of adding it into my skincare routine"

— Jennifer S. (5/5)

Okay, yes, I smell like

"Okay, yes, I smell like an Easter ham for a few minutes after application, but I kinda dig it and it dissipates quickly. The texture is thin, so a little goes a long way and the product absorbs quickly. I have very fussy skin, and this has given me great benefits without negative side effects."

— Julie B. (5/5)

Quality Vitamin C Serum

"I have tried a lot of Vitamin C serums at all different price points, and this is one of my favorites. It is gentle and non-irritating. It "plays well" with other serums, moisturizers, and sunscreens (chemical and physical). I like that it uses the THD version/formulation of Vitamin C, which according to what I've read is one of the more effective Vitamin C formulations. This serum comes in an airless pump. I would suggest that if you are starting with a Vitamin C serum and your skin is very sensitive, you start your Vitamin C journey with a less potent concentration and work up to this. The only drawback? This does have a "Vitamin C serum scent"--not quite hot dogs, but a little of a "burnt" smell. If you've used Vitamin C serums, you are familiar with the smell."

— Megan (5/5)

My favourite vitamin c serum.

"My favourite vitamin c serum. Other vitamin c serums cause redness and a burning sensation. The Skinfix vitamin c serum is gentle and effective on my sensitive skin. Will always repurchase."

— Julie M. (5/5)

My new favorite Vitamin C

"I have ultra-sensitive skin and hormonal acne, so I’m very picky about what I use on my face. Skinfix Vitamin C gives me the glow I was looking for without irritation, and my dermatologist approved it too! 🤍 A true skincare favorite."

— Sofia O. (5/5)

Love this serum. It feels

"Love this serum. It feels both light and substantial. It absorbs and layers well. Would recommend!"

— Molly V. (5/5)

I’ve only been using the

"I’ve only been using the product for about a week but so far, so good! Skin feels soft and bright and the formula is not sticky!"

— Julie C. (5/5)

Great product and doesn’t irritate

"Great product and doesn’t irritate my skin"

— Lauren L. (5/5)

I am noticing dmsome difference

"I am noticing dmsome difference . It's not too long since is started."

— Haydee C. (5/5)

I haven’t noticed too much

"I haven’t noticed too much of a change yet, but I love the way my skin feels after now having a consistent routine with skin fix."

— Ashley r. (5/5)

Q&A

Will there be a travel sized bottle soon?
Hi Sierra, Thanks for touching base here. The Brighten + Firm 15% Vitamin C Serum is travel compliant at its current size of 30mL. Any item under 100mL meets this standard. Please do not hesitate to reach out if you have any additional questions or need assistance to info@Skinfix.com
Is this product good for 85 yo dry skin
Hi Irene, Vitamin C is a powerhouse antioxidant that helps brighten dullness, fade visible dark spots, and firm the look of skin over time. It also helps defend against free radicals that can make spots look darker and lines look more pronounced—so you're protecting while you treat. We hope this helps!
Can I pair this with Azelaic acid in the morning? I currently use tretinoin 0.05% at night so I can't pair anything with tret at night due to irritation. If I can pair azelaic acid (15% in my case), should I use this serum first and then the azlaic acid? Or should I use the acid first, then this vitamin c serum?
Hi Prithvi, Each pump delivers vitamin C, peptides, humectants, and antioxidants—doing the work of several serums in one. You could alternate days - one day Vit C then next day Azelaic acid? But please confirm with your prescribing doctor to ensure these ingredients are right for you. We do not recommend layering these actives at the same time. Thanks!
Can I apply this serum to the under eye area? In currently avoiding that area and just going up to and around the orbital bone
Hi Prithvi, Thank you for reaching out and for your question. This serum isn’t made for the delicate eye area, so keep it on the orbital bone only (not the lids or too close to the lash line). If you're looking for eye-specific benefits, we recommend trying our Triple Lipid Eye Treatment. Thanks!
Can I use the Brighten + Firm 15% Vitamin C Serum with the Mad About Skincare copper peptide serum? Thanks.
Hi Melissa, 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. We hope this helps!
Would the vit c need to be refrigerated
Hi Gale, We don't recommend putting Brighten + Firm Vit C Serum in the fridge. Storing it in a cool, dark place is enough to help prolong the formula’s potency—especially if you live in a warm or humid climate.
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