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Vital-C Antioxidant Day Serum


Regular price $80.00 Sale

Our light, bright, powerfully potent daytime Vitamin-C serum is jam-packed with potent antioxidants, hyaluronic acid, and active, mighty extracts like olive leaf, mullein leaf, and licorice root to deliver immediate skin radiance.

Its chief tasks: help neutralizing your skin’s daily exposure to harmful free radicals such as pollution, UVA/UVB rays, and infrared radiation, as well as counteracting dark spots and discoloration for a lit-from-within glow.

Shake before use. In the morning, pat 4-5 drops gently all over freshly cleaned skin: face, neck and chest. Layer with other moisturizers and sunscreen (always) for extra efficacy and protection.

  • Neutralizes the harmful effects of free radicals: environmental pollution, UVA/UVBs, infrared radiation.
  • Boosts radiance and brightens complexion by evening out dullness, dark spots, discolorations and general skin damage.


Fast absorbing, silky, ultra light, non-sticky.


Herbaceous, floral, fresh.


Key Ingredients

Customer Reviews

Based on 14 reviews
Skin Type: Combination
Vital-C Antioxidant Day Serum :’ )

This is the first time I’ve used a skincare product with Vitamin C, and the first couple weeks have been lovely so far. Within the first few days, the tone of my skin was noticeably more even and I haven’t felt any discomfort, which honestly surprised me. It is indeed light, yet the smell is beautifully nuanced and it absorbs into my skin easily without leaving an unpleasant texture. I’m looking forward to trying more from Circumference the next time I order this serum!

Effective and not skin irritating

Although, I can feel it working when on skin, so I only apply in daytime and not at night. Smells nice and feels nice. Like the ample size of product as well!

Skin Type: Combination

My partner and I use the toner, Vital-C Serum, Face Oil and Hydrating mask religiously and are in love with the way it makes our skin feel. The hydrating mask is a necessity for the winter months in NYC. Thank you for your incredible products. We just need a face cleanser!

Skin Type: Combination

I have tried every face serum under the sun and this is the only one that has made a noticeable difference (I'm about 2 weeks in). I've spent three times as much on "holy grail" face oils with little to no difference, so I was skeptical. Not only is this serum effective, but I love how sustainable the brand is. Will be buying again!

Skin Type: Combination
Calming, soothing serum

I've been making a conscience effort to move to clean or science backed beauty. I've used skinceuticals and other comparable serums for the last 10 years and finally made the change to the circumference Vitamin C along with the moisturizer. I'm very happy with the change so far and love how the serum feels on my skin. Light, refreshing and hydrating. I also very much appreciate the sustainable practices as I believe we all need to start making these choices for our future.

60 Day Guarantee

If you are not 100% happy with our products or service, then we aren’t either. We offer a risk-free, 60-day, 100% full-refund return policy. If you are not satisfied with your order, contact us and we’ll assist you in processing your return.