Squalane + Vitamin C Dark Spot Serum

A targeted 10% vitamin c treatment to brighten and fade dark spots

495 reviews
  • Squalane + Vitamin C Dark Spot Serum
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  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Full sizeSize: 30mL/1.01oz

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  • EWG

  • Vegan

  • Cruelty Free

  • Nontoxic

  • Paraben free

  • PEG free

Clinical Report

% Confirm

  • 100%agree this product helps improve the look of dark spots*
  • 100%agree this product improves the look of sun damage*
  • 97%showed improvement in uneven skin tone*
This powerful and lightweight vitamin C for dark spots serum:
  • Delivers a boost of brightness with 10% vitamin C, while white shiitake mushroom fades dark spots
  • Shows visible brightening instantly, while it works over time to dissolve pigmentation and prevent new discoloration
  • Our unique blend of ingredients is precisely calibrated to not cause irritation like traditional vitamin C serums

This first-of-its-kind dark spot serum features a proprietary white shiitake mushroom extract blended with our unique derivative of vitamin C, and delivers quicker, more powerful, longer-lasting results. Not only does it start degrading dark spots immediately, it keeps working every day to prevent new ones from forming.

Learn more about our newest launch, Vitamin C Dark Spot Serum.  Deep dive into our revolutionary formula and read on our blog post why a higher concentration isn't always more effective.

Shop all clean face serums & masks.

For external use only. Use only as directed. Avoid eye area. We recommend a patch test prior to use if you are particularly sensitive. If irritation occurs, consult a dermatologist.

  • EWG

  • Vegan

  • Cruelty Free

  • Nontoxic

  • Paraben free

  • PEG free


    Massage 2-3 pumps of the vitamin C for dark spots serum onto a cleansed face and neck, morning and night. Use before other treatment products, and follow with any Biossance moisturizer.

Layering Guide:

  • Step 1: Cleanser
  • Squalane + Elderberry Jelly Cleanser
  • Squalane + Antioxidant Cleansing Oil
  • Squalane + Tea Tree Cleansing Gel
  • Step 2: Toner
  • Squalane + BHA Pore Minimizing Toner
  • Step 3: Mask
  • Squalane + Glycolic Renewal Facial
  • Step 4: Eye Treatment
  • Squalane + Peptide Eye Gel
  • Squalane + Marine Algae Eye Cream
  • Step 5: Treatment
  • Squalane + Phyto-Retinol Serum
  • Squalane + Lactic Acid Resurfacing Night Serum
  • Squalane + Vitamin C Dark Spot Serum
  • Step 6: Moisturizer
  • Squalane + Omega Repair Cream
  • Squalane + Probiotic Gel Moisturizer
  • Step 7: Oil
  • 100% Squalane Oil
  • Squalane + Vitamin C Rose Oil
  • Squalane + Tea Tree Balancing Oil
  • Step 8: Sunscreen
  • Squalane + Zinc Sheer Mineral Sunscreen
  • Step 9: Makeup
  • Apply foundation, BB/CC creams and any color cosmetics
  • Anytime: After Step 1, Over Makeup, or Throughout the Day
  • Squalane + Omega Repair Hand Cream
  • Squalane + Hyaluronic Toning Mist
  • Squalane + Rose Vegan Lip Balm
10% vitamin C
  • SQUALANE: Derived from sugarcane, it mimics body's natural hydrating oils to provide weightless moisture to deliver active ingredients deep into the skin and prevent overdrying.
  • White Shiitake Mushroom: Synergistic mushroom blend that starts degrading dark spots immediately and continues correcting discoloration with continued use.

All Ingredients:

Water/Aqua/Eau, Glycerin, 3-O-Ethyl Ascorbic Acid, Squalane, Lentinus Edodes Mycelium Extract, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Glycyrrhiza Glabra (Licorice) Root Extract, Sodium Hyaluronate, Citric Acid, Polyacrylate Crosspolymer-6, Acacia Senegal Gum, Xanthan Gum, Sodium Gluconate, Sodium Citrate, Phenoxyethanol, Ethylhexylglycerin.

  • 1Will this get rid of my Melasma/hyperpigmentation/acne scarring?

    With continued use of this serum and sunscreen protection you can see an overall more even skin tone and help fade visible discoloration in the skin.
  • 2Why 10% of L-ascorbic acid/ Vitamin C?

    This is a daily use treatment, a lifestyle serum if you will. 10% has been shown to be an effective and safe amount for daily use. A higher percentage does not equal better or faster results. It is actually possible to have a higher chance of sensitivity when using higher %’s. Even if the % is higher it does not mean that the ingredient is acting on the skin in a stronger manner. I would value stability over higher % for better results and less chance of degradation/irritation. The stability of Vitamin C within a formula is much more important than the percentage.
  • 3Should this be used for spot treat or all over application?

    Results are better if applied all over - our formula only targets excess melanin.
  • 4Is it fragrance free?

    No synthetic fragrance or essential oils are added, so it is completely fragrance free. The ingredients themselves may emit a mild scent that should dissipate after application


Customer Reviews
4.6 Based on 495 Reviews
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United States United States
love to use, not sure if it does anything

I'm on my 3rd bottle of this. I'm in love with the texture. It's so light and hydrating, no stickiness or smell. I have acne prone, dry skin - it doesn't make my acne flare, and it moisturizes my skin beautifully. But beyond that, I really can't tell if it's doing anything. And it's been 5 months. After this bottle, I want to move on to a tried and true L-ascorbic acid formula instead of this vitamin C derivative. I would rather spend more money on a proven formula than shell out $62 on a hopeful derivative. That's just my personal preference, though. I do still love the experience of this and would use it again if there were more evidence for it.

  • Age 25-34
  • Top Concern Blemishes
  • Skin Type Dry
United States United States
Magic in a bottle.

I had dark spots around the top and sides of my forehead near my hair line. This product has worked its magic. All the scaly spots are gone. Magic in a bottle.

Kristin Z.
United States United States
It works..

I purchased this product back in December, within 4 weeks was extremely pleased with the results. This is the first time I have ever repurchased a skincare product. I am a 70’s baby that over loved the sun in the 80’s.. this stuff made huge difference in my dark spots from those sunny days!

  • How old are you? 45-54
  • What skin issue concerns you most? Uneven Tone & Dark Spots
  • What is your skin type? Dry
Ashley G.
United States United States
Didn't work

Saw no change using this product.

  • Age 35-44
  • Top Concern Uneven Tone & Dark Spots
  • Skin Type Dry

Hello Ashley! Thank you so much for sharing your experience with us! I am so sorry you are not in Love with the Dark Spot Serum formula! We would be curious to know what your full regimen looks like and how long you had been using this serum with protective spf! I will ask someone from our Customer Care Department to get in touch with you to further assist today! If you have any questions or concerns, please reach out to us instantly on LiveChat or Video Chat by finding the gray chat bubble on the bottom right of Biossance.com. If you purchased this on Biossance.com please visit biossance.com/a/returns to return the product. Thank you & have a wonderful day, The Biossance Team

constance h.
United States United States
Incredible results!

I have some sun spots on my face that I’ve had for years. I exfoliate regularly, but in mere DAYS I have a visible improvement. Very satisfied with this product. Thank you Biossance!

  • What is your skin type? Normal
  • What skin issue concerns you most? Fine Lines & Wrinkles
  • How old are you? 55


Our commitment to people and planet applies to everything we create. We innovate every aspect of our company and supply chain to do better for our world and be the leading pioneers in sustainable beauty.


    Our squalane is derived from renewable sugarcane.

    Formulated using the latest sustainable methods. No deforestation and developed in far proximity from rainforests. Low water usage.

    Sugarcane and Forest Stewardship Council-certified boxes (FSC).

    Vegan, cruelty-free and nontoxic for people and the environment.

    All of our inner and outer cartons. (This excludes our airless bottle components and pumps.) We are working towards more sustainable solutions.
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