Editor's TipEditor's Tip

Many serums claim to use vitamin C, but they are actually only using a tiny amount of low-quality ingredient. This serum uses a chirally purified (read: highly effective) form of vitamin C at a very high percentage.

Birchbox Breakdown

There is no fluff in this highly concentrated serum. Every ingredient, starting with its whopping dose of pure vitamin C, works to diminish signs of aging like dullness and wrinkles. Used daily, Sircuit Weapon helps your skin look and feel younger — toned and glowing. It also adds hydration so that you're always perfectly in balance.

How it Works

The hero of this potent serum is L-Ascorbic Acid, or vitamin C, a proven anti-aging ingredient that spurs collagen production (the first thing that goes as you get older). It also has a cocktail of other actives, including moisturizing sodium hyaluronate and soothing witch hazel .

How to Use

Because this serum is very concentrated, start by incorporating it into your skincare regimen every other day. Apply a few drops to clean skin, before using toner or Sircuit's Molecular Mist. Smooth it over your entire face and neck, avoiding eyes.

Witch Hazel Extract, 10% L-Ascorbic Acid/Wine Phytoalexin Complex,Cassia Beta Glycan Extract, L-Sodium PCA, Sodium Hyaluronate, L-Proline, Squalane, Black Currant Oil

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Product Reviews & Sample Feedback

6 Reviews
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Most Helpful Customer Reviews

Didn't feel the vitamin C
Purchased

This SIRCUIT serum didn't do it for me. It was a bit of a letdown. I didn't see age spots lighten or notice that my face glowed -- and I used it every day.

2
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SIRCUIT® Cosmeceuticals Sircuit Weapon
Purchased

I am getting ready to order this product again. My skin tone appears smoother. I like that this can go around the eyes (gently) eliminates the need for more products. I have been using this and moisturizer as my routine.... My skin does not look too bad. Thanks BIrchbox

5
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Purchased and regret it
Purchased

I finally decided to splurge and buy the full size. It was really...meh. I don't know why I didn't feel much from it. I used it faithfully and still didn't feel like I noticed much. However, that didn't matter anymore when I accidentally knocked it off my counter and it shattered everywhere :(

3
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Great product!
Purchased

I really like this product and use it every morning. It has lasted a while (a couple of months now) and I still have more left. I think a bottle will last around 3 months for me, which isn't bad for the price.

4
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I feel like it's working
Purchased

I haven't had this product for very long. But it seems very potent and even has a slight burn when I put it on. A little goes a long way, so I suspect it will last a long time.

5
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great product
Purchased

I have always used Skinceuticals AOX in the past and my facialists tried this one me. Worked very well on me, brightened my face up. So when I saw Birchbox selling it. I bought it. Been using it since May and so far, i am only halfway thru the bottle

4
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