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

Get 2 free samples with all orders

Free shipping on orders over $50

  • The Skinfix Essentials Set

    The Skinfix Essentials Set

    Four bestsellers. One complete routine.
    $224
    $300 $224
  • New
    Skinfix Brighten + Firm 15% Vitamin C Serum and Exo + Ectoin Intensive Repair Baume side by side

    AM/PM Treatment Duo

    Vitamin C + retinol-alternative
    $158
    $186 $158
  • New
    Skinfix Brighten + Firm 15% Vitamin C Serum and Triple Lipid-Peptide Cream shown side by side.

    Radiance + Repair Duo

    High-impact dry skin essentials
    $141
    $166 $141
  • New
    Skinfix Brighten + Firm 15% Vitamin C Serum (30 mL) in orange and Ceramide Prime Whipped Cream (50 mL) in light blue, on a transparent background.

    The Makeup Prep Set

    Derm-approved AM skin prep
    $141
    $166 $141

Brighten + Firm 15% Vitamin C Serum

Orange skincare serum container with 'skinfix' branding on a white background

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 water-attracting humectant that hydrates and helps skin retain moisture

    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 water-attracting humectant that hydrates and helps skin retain moisture

    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 a 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

  • 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: 4.599315 / 5 from 292 reviews.

AI Generated Review Summary

The Brighten + Firm 15% Vitamin C Serum is praised for its quick absorption, lightweight texture, and visible results in fading dark spots and firming skin. Customers appreciate its gentle formula and non-irritating nature, while some have mixed opinions on its scent.

Summary topics

  • Absorption Speed (14%): It was reported by customers that the product absorbs quickly into the skin and layers well under moisturizer and sunscreen.
  • Dark Spots Fading (10%): Customers expressed appreciation for the product's ability to fade dark spots and make skin feel firmer.
  • Product Texture (16%): Many customers pointed out that the texture of the product is lightweight and silky, making it easy to use both morning and night.
  • Visible Results (12%): Customers raved about the visible results achieved with the Skinfix Target 15% Vitamin C Serum.
  • Skin Feel (21%): A significant amount of customers expressed satisfaction with how the product feels on their skin, describing it as smooth, effective, and gentle.

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

Review highlights

  • "After using it, I notice a soft, healthy glow that makes my skin look more refreshed and hydrated throughout the day." — Aley G.
  • "My skin feels so soft and has a healthy glow when I apply the skinfix moisturizer to my face, neck and chest." — Rosina I.
  • "With consistent use, skin appears brighter, more even, and smoother, while still feeling calm and hydrated." — Lavi

Reviews

My Favorite Vitamin C Serum Ever!

"In true Skinfix fashion, my skin loves this product. I've tried countless vitamin c serums in my day, but this one easily takes the cake as my favorite of all time. I'm a sucker for any serum with a milky consistency, and this serum's creamy and nourishing feel does not disappoint. When used consistently, I notice a visible increase in my skin's overall brightness and evenness. The added anti-aging peptides are a bonus, too! Trust me, it's worth every penny!"

— Bryce (5/5)

This product feels good on

"This product feels good on my skin but I can't get passed the smell. It smells like a pot of boiled hot dogs. I have used other Vit C serums with additions like turmeric and they smell wonderful. I'll continue to use until the bottle is finished but the smell is horrid."

— Caitlin C. (2/5)

Love it!

"I really like this serum and it’s become a fixture of my morning routine! My skin feels refreshed after using it and it layers well with the Ceramide cream and my sunscreen. A lot of the reviews talk about the scent. Quite honestly, it smells like bacon & clove. While weird, it’s not unpleasant and definitely doesn’t make your face smell."

— Emily (5/5)

This is a really great

"This is a really great vitamin C serum, especially for sensitive skin. It absorbs quickly and leaves my skin feeling smooth without any irritation or heaviness. It does have a fairly strong smell when first applied, but I find that it dissipates very quickly. With consistent use, I’ve noticed an improvement in the appearance of my hyperpigmentation and my skin looks brighter and more even overall. I also really appreciate that it feels gentle enough to use when my skin barrier is feeling sensitive or compromised. I would definitely recommend this to anyone looking for an effective vitamin C serum that is still suitable for sensitive skin."

— Kelly B. (5/5)

Have been using the Vitamin

"Have been using the Vitamin C cream for less than 30 days and have already noticed my skin has brightened. Enjoy the light smell (kind of smells like an orange) and the feel of the location (not thick)."

— DAWN L. (5/5)

great quality product and it works!

"This product really works! After a few months of use now, I can fully see the results of this. My dark spots can barely been seen and my skin feels firmer."

— talia (5/5)

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)

I can't say that I

"I can't say that I notice a difference after using this, but perhaps it adds to the glow? I've only been using it for a few weeks now. I do love the smell (weird, I know) and it feels good going on."

— Leelee M. (4/5)

I’m only giving this a

"I’m only giving this a 4 as I don’t feel I’ve been using it long enough to tell a difference. I have noticed some brightness in my skin."

— Melissa K. (4/5)

The cream is fine although

"The cream is fine although I am not a fan of the scent. I wouldn’t get it again for that reason."

— Gail H. (3/5)

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.
Would the vit c need to be refrigerated
Hi Gale, We don't recommend putting Brighten + Firm 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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