Beautycounter’s Vitamin C Serum – my review & results!

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While I had a solid skincare routine for years, I never really thought about a vitamin C serum, other than trying random samples I got years ago when I still used BirchBox. But when Beautycounter launched a vitamin C serum a few years ago, I quickly tried it since I love all their skincare.

Fast forward a few years and I’ve been using the serum consistently since I first tried it. It’s a MUST in my skincare routine. I thought my skin was bright – I mean, honestly it was. But now I feel like it glows so easily, with or without makeup. AND I feel like it helped keep my melasma at bay this past year while I was pregnant with Charles. I didn’t notice it popping up at all!

Since the weather is starting to heat up and summer is on the horizon, Vitamin C is an extra important step for your skincare routine, so today I’m re-sharing this post with my detailed review of the Beautycounter All Bright C Serum (since it’s the most effective Vitamin C serum I’ve ever tried).

Let’s dive in!

TeriLyn Adams holding the Beautycounter Vitamin C Serum Review

Beautycounter Vitamin C Serum Review

Before I get into all the details, I thought a little “before and after” of the Beautycounter All Bright C Serum would be fun. The difference was SO impressive after just a couple weeks.

Before and After

After Vitamin C Serum

Here is a photo of me after using the All Bright C Serum for a few weeks when it very first launched. And you can see from the picture above, my skin has even more of a glow after using it for a few years.

TeriLyn Adams showing her after using the beautycounter vitamin c serum

Before Vitamin C Serum

This photo was taken about two months before the All Bright C Serum. My skin looked great, but I immediately notice that my age spots on my cheeks and nose are a LOT lighter now. And my skin just looks like it has a true glow and is almost bright from within in the photos above.

woman showing her face before using beautycounter vitamin c serum

What does the Beautycounter Vitamin C Serum do?

  • Brightens and evens skin tone.
  • Defends against environmental stressors and free radicals that negatively impact skin’s appearance.
  • Helps prevent and reduce dark spots and discoloration (e.g. age spots, melasma, acne scars) to boost and brighten skin.
  • Supports the skin’s natural collagen production to make skin look more youthful.

Beautycounter All Bright C Serum Key Ingredients

  • 5% Tetrahexyldecyl Ascorbate – This form of vitamin C is an antioxidant that helps reduce the appearance of dark spots and boosts skin brightening to reveal more youthful-looking skin.
  • 5% Bis-Glyceryl Ascorbate – This form of vitamin C moisturizes while also providing antioxidant benefits that protect skin from damaging environmental stressors—and this helps improve the appearance of fine lines and wrinkles
  • Turmeric Root – Helps even your skin tone and improve the appearance of wrinkles and fine lines.
  • Camu Camu Fruit Extract: This helps reduce the appearance of dark spots while brightening to visually improve signs of skin fatigue.
Serum swatch on the back of hand
All Bright C Serum consistency

What is the best Vitamin C serum?

When people ask about the “percent” of vitamin C, they often think higher is better, but actually, super high potency can cause irritation. And, while most brands on the market use 15%, you also have to look at the stability of those products and the type of vitamin C used in them. Many brands that claim 15% actually don’t live up to the percentage claim when they are tested. When tested off the shelf, the Vitamin C in them aged and degraded, even before they sat in a bathroom at home.

What Percent Vitamin C Serum is Best?

Most popular, high-end vitamin C brands use a less stable form of Vitamin C, 15% L-Ascorbic Acid. Alternatively, the Beautycounter All Bright Serum uses a total of 10% of ultra-stable Vitamin C from Japan. The two types are 5% bis-glyceryl ascorbate and 5% tetrahexyldecyl ascorbate. These were specifically selected for their stability and efficacy over time.

Additionally, tetrahexyldecyl ascorbate is effective at lower concentrations, which means less potential for irritation. This formulation is also lipid-soluble, so its effects are deeper and longer-lasting in the skin. It actually penetrates the skin, which is a much better delivery system. L-Ascorbic Acid, on the other hand, is tricky to formulate with. It loses efficacy when it comes into contact with water. That’s why you are seeing high-end brands sell DIY products that mix the Vitamin C with the serum at point of use to help avoid that.

So, all that to say, when you look buying a vitamin C serum, make sure you look at the type of vitamin C used, not just the percentage.

How much does Beautycounter Vitamin C Serum cost?

One of the leading Vitamin C serums on the market (which is considered the gold standard in Vitamin C serums) sells for for $166 for 30 ml, while the Beautycounter Vitamin C serum is $90 for 30 ml.

Bottom line: I think Beautycounter’s All Bright Serum is your best bet in terms of efficacy, cost, and lower risk for irritation.

Beautycounter Vitamin C Serum Review

Beautycounter’s Vitamin C Serum Benefits

Packed with antioxidants

The all Bright Serum uses Turmeric Root Extract to give the serum its bright yellow hue. They never use dyes.

Turmeric (curcuma longa) is an antioxidant superstar that helps even skin tone and improve the appearance of fine lines and wrinkles. It also contains Camu Camu Fruit Extract to help reduce the appearance of dark spots while brightening to visually improve signs of skin fatigue.

The ingredients in this serum (especially the curcuma Longa (turmeric) root extract, myrciaria dubia fruit extract), are powerhouses.

Stable and won’t oxidize

Like mentioned above, Vitamin C products can be very unstable and lose their effectiveness quickly. Beautycounter’s vitamin C serum is a blend of two ultra-stable forms of vitamin C. If you’re currently using a Vitamin C product, check to see what form of Vitamin C it contains. Most on the market contain the L-ascorbic form, which turns brown. The Beautycounter All Bright C Serum won’t oxidize and lose its potency.

10% Potency for results without irritation

When a serum’s concentration of vitamin C is too high, there’s a chance of skin irritation—but when it’s too low, it doesn’t deliver as many benefits. Beautycounter’s vitamin C is the best of both worlds: effective without irritation. It uses:

  • 5% Tetrahexyldecyl Ascorbate: This antioxidant helps reduce the appearance of dark spots and boosts skin brightening to reveal more youthful-looking skin.
  • 5% Bis-Glyceryl Ascorbate: A second form of vitamin C, this ingredient moisturizes skin while providing antioxidant benefits known to protect skin from damaging environmental stressors—and helps improve the appearance of fine lines and wrinkles


The All Bright C Serum is formulated without ethoxylated ingredients (including PEGs) due to reproductive and developmental concerns (as well as toxicity to the aquatic environment). It’s also formulated without dyes. As always, every ingredient used by Beautycounter has gone through rigorous raw materials screening and testing to ensure it’s safe.

Absorbs quickly

I’ve tried a ton of different vitamin C serums over the past few years, and I always go back to Beautycounter because it feels better on my skin. It absorbs quickly, feels natural, doesn’t leave a sticky or tacky residue, and my makeup applies perfectly on top. Some other brands I’ve tried either feel a little tacky or sticky as they dry, or they don’t look great under makeup. I also really like the slight scent – it’s not strong, but smells a little bit like summer.

All Bright C Serum FAQs

How do I use the Vitamin C Serum?

Use the All Bright C Serum as a “treat” step with any regimen. After cleansing and toning in the morning, use your regimen’s regular serum, wait about 30 seconds, then layer All Bright C Serum on top. Apply to face, neck, and décolletage. Follow with your moisturizer, eye cream and sunscreen. If you’re looking for a more in-depth how-to for a skincare regimen, you can join my skincare course (for free!).

Should I use Vitamin C Serum at night?

Nope! This is designed to be used during the day. For a product that works while you sleep, use the overnight resurfacing peel! The combo of the two is amazing! While the peel works overnight, the Vitamin C serum is designed for day use. It won’t hurt to use it at night, but it includes ingredients to help protect against environmental stressors and potential sun damage you’re exposed to during the day. So, that’s when you’ll get the most out of it! (This post explains more about the overnight resurfacing peel.)

Can You Use Vitamin C Serum Under Makeup?

Yep! I use it as my AM skincare serum, followed by moisturizer, SPF, and then makeup.

Is Vitamin C Good for Melasma?

Yes! Vitamin C helps reduce (and prevent) dark spots and discoloration, such as melasma. It helped keep my melasma at bay while I was pregnant with my first and now my second.

How is it different from the Beautycounter Brightening Oil?

The new serum has a much higher dose of Vitamin C compared to the Beautycounter All Bright Brightening Facial Oil. That means the vitamin C serum will be much more effective at brightening. Think of it this way: the primary job of face oils is to improve hydration and the brightening benefits you’ll get are secondary. If brightening, reducing dark spots, and/or improving dullness are your main goals, you’ll want the Vitamin C serum rather than the Beautycounter Brightening Oil.

Does Vitamin C Cause Purging?

Purging is when a new product causes your skin cells to turn over more quickly and results in a temporary breakout. Since Vitamin C does include fruit acids, it’s possible to experience some purging. However, I didn’t have that issue. I always recommend doing a patch test on your arm before using a new product on your face, so that you can determine if your skin is having a normal reaction while getting adjusted to a new product, or if the product is truly not good for your skin.

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    10 responses to “Beautycounter’s Vitamin C Serum – my review & results!”

    1. Mine arrives on Friday and I can’t wait to see what my before and after photos look like. I have some troublesome sun spots on my forehead and cheeks.

    2. i’d love to try this. i’m 50 and have combo skin that leans more on the oily side in the summer. i use the countertime serum and then the balancing oil. i wonder if the 2 serums would be too much in the morning?

      • It shouldn’t be too much since the serums do very different things! If you’re oily in the summer, you may want to switch to the Countermatch Adaptive Lotion rather than the balancing oil. The oils are designed to increase hydration when a face lotion isn’t enough, but isn’t really designed to be used as your primary or only moisturizer.

    3. Thanks! I was trying to decide if I needed the vit. c serum AND the brightening oil. Didn’t think I needed both and this confirmed it! Thanks for the review!

    4. Awesome post! I have been using this and had no idea how effective a vitamin C serum could be! I never wanted to try because of safety, but hey, beautycounter, heeeey.

    5. In your article about the Beautycounter resurfacing peel you said put it on at night and don’t rinse and then go into your morning routine, I’m assuming that means wash your face in the morning, correct?

      • Correct, I do wash my face in the morning. You just don’t want to rinse the peel off at night since it works overnight.

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