What to Know about Vitamin C in Skincare ft. Good Molecules Vitamin C Booster Powder

Vitamin C is one of the most popular ingredients in skincare today, and for good reason. There are multiple benefits vitamin C can provide to the skin. It evens out skin tone, brightens skin, protects skin from free radical damage, and reduces the appearance of fine lines and wrinkles. It’s quite the superstar ingredient, so it makes sense that many of us seek out products that contain vitamin C.

What to look for on vitamin C product labels

According to a Paula’s Choice article about vitamin C, this ingredient is most effective at a concentration of at least 10%. Most products containing vitamin C won’t provide you with a percentage, but high strength vitamin C treatment and serum products are more likely to be forthcoming with that information. 

As for the ingredient name, don’t expect to see “vitamin c” on any ingredient lists. Pure vitamin C’s ingredient name is ascorbic acid (a.k.a. L-ascorbic acid). Ascorbic acid is the most researched and most trusted form of vitamin C. Many also believe that it is the most effective form of vitamin C. There are several derivatives of ascorbic acid that have a good amount of research backing them including sodium ascorbyl phosphate, ascorbyl palmitate, 3-O ethyl ascorbic acid, tetrahexyldecyl ascorbate, magnesium ascorbyl phosphate, and ascorbyl glucoside. These derivatives must be converted into ascorbic acid by the skin cells in order to be effective.

Why not stick to ascorbic acid instead of using derivatives?

You might be wondering why any vitamin C products would contain ascorbic acid derivatives instead of pure ascorbic acid, since ascorbic acid is the most trusted form of vitamin C. The answer is simple. While ascorbic acid is very effective, it unfortunately is not stable when exposed to light and air. It can also be very irritating to the skin, especially sensitive skin. Vitamin C derivatives are generally more stable and less irritating than pure ascorbic acid.

Vitamin C product packaging

Vitamin C products, especially ones containing ascorbic acid or less stable derivatives, must be packaged in such a way that no light or air can reach the product. The efficacy of vitamin C degrades quickly once it comes in contact with light or air. For that reason, it’s important for products to be packaged in opaque airtight containers to protect vitamin C ingredients. Products that Good Molecules Vitamin C Booster Powdercome in jars or transparent packaging, won’t remain effective for very long. If you notice the color of a vitamin C product changing, it’s probably gone bad.

There is one case in which the packaging of an ascorbic acid product doesn’t really matter as much: pure ascorbic acid powder. In powder form, ascorbic acid is much more stable and less likely to degrade. Ascorbic acid doesn’t become unstable until it mixes with water. On that note, I’d like to introduce you to the Good Molecules Vitamin C Booster Powder!

Good Molecules Vitamin C Booster Powder claims directly from GetGoodMolecules.com

Promote a bright, firm and smooth complexion with Vitamin C Booster Powder from Good Molecules. Made from only 100% pure l-ascorbic acid, this powder mixes into serums, creams, and moisturizers to supercharge your favorite products with the antioxidant power of vitamin C.

Other product details

  • Price: $8.00
  • Net weight: 0.71 oz. | 20 g
  • Made in Korea
  • Cruelty-free
  • Vegan
  • Fragrance-free
  • Shelf life: 6 months
  • Where to buy: GetGoodMolecules.com or Beautylish.com
    • GetGoodMolecules.com ships internationally.
    • Beautylish.com ships to 56 countries (see the list here)
  • Overall rating: 8.4/10
    • Packaging: 8/10
    • Ease of use: 7/10
    • Team player: 7/10
    • Ingredients: 10/10
    • Price: 10/10

Please note that I am not a skincare professional. I am simply an individual that enjoys learning about and using skincare products. Speak to your dermatologist or esthetician if you have any concerns.


Good Molecules Vitamin C Booster Powder is packaged in an amber glass jar with a twist-off lid. While the packaging isn’t nearly as important for this product since it is in powder form, I’m still glad that Good Molecules made the choice to use dark colored glass to prevent too much light from reaching the product regularly.

The only bad part about this type of packaging is that once the lid is removed, the product is completely exposed to light and air. This shouldn’t be an issue in most cases, with the exception of very humid environments. If using this product after a hot steamy shower, it would be best to wait until the room has cooled and the extra humidity has cleared before opening the jar.

This product comes boxed with a tiny spoon to scoop out the appropriate amount. I appreciate the spoon because it would be very difficult to know how much of this product to use otherwise. Unfortunately, there isn’t any way to keep the spoon with the jar. It would be nice if it fit inside the lid somehow, but since that isn’t the case I just keep the jar and spoon together in a drawer organizer tray.

Ease of use

Product instructions from Good Molecules: Using the enclosed spoon, mix one spoonful into your serum or moisturizer until fully dissolved. Apply once daily in the morning or at night up to three times per week. You may experience a tingling sensation, which will diminish with regular use. Discontinue use if irritation occurs.

As you can probably imagine, this booster powder isn’t as easy to use as something like a vitamin C serum. It requires a little bit of juggling since this powder must be combined with a serum or moisturizer to be applied to the skin. When I first started using this product, I tried mixing it with a serum because I thought that would be easiest. It might’ve just been the type of serum I was using (I think it was a niacinamide serum), but the powder did not dissolve easily, which meant that it also did not apply well on my skin. 

I’ve had much better luck with this product since I started mixing it with moisturizers instead. I should also note that it works better with creamy moisturizers compared to ones with a gel consistency. That might not be the case with every gel moisturizer, but that’s the experience I’ve had with my products.

I’m glad that Good Molecules stated clearly in the instructions that a tingling sensation is normal with this product, because I definitely experience that every time I use it. I was surprised in the beginning too, because I’ve used a wide variety of skincare products the last few years and didn’t think my skin would be very sensitive to pure vitamin C. Thankfully, that tingling sensation has definitely reduced in the two or three months that I’ve been using this powder regularly twice a week.

While this product isn’t the easiest to use vitamin C product on the market, I also have to consider that it isn’t meant to be used daily. Since it is only intended for use 2-3 times per week, the mild inconvenience may be well worth it for a lot of people. I wasn’t sure about it at first, but I don’t mind the “inconvenience factor” too much now that I’ve figured out the best way to use this powder.

Team player

It might come down to which specific products are being paired with this vitamin C powder, but in my experience, this product is a much better team player at night than in the morning. For those that don’t wear makeup, this might not be a problem. However, on the mornings that I’ve tried to use this product, I ended up with my face looking flaky/powdery, and makeup didn’t apply well over it. That is likely because the powder was not fully dissolving in the lightweight products that I was using. Since I do try to keep my morning skincare more lightweight overall, I decided that I’d just start using this product exclusively at night.

Now that I’ve gotten through the learning curve with this product, I consistently use it mixed with my PM moisturizer which is the last step of my night time skincare routine. Since the powder seems to dissolve well in thicker moisturizers, it also then applies easily on the skin. I’m not left with that powdery flaky feeling that I had when trying to use this product in my morning skincare routine.


I’m used to reviewing products that are formulated with 15-30 ingredients. Since Good Molecules Vitamin C Booster Powder only contains one ingredient, this should be the easiest ingredient review I’ve ever done!

Good Molecules Vitamin C Booster Powder is 100% ascorbic acid (L-ascorbic acid), the purest form of vitamin C. I named quite a few benefits of vitamin C in the intro, but there are even more beyond those that I already listed: 

  • Boosts the skin’s collagen production, which helps to keep skin smooth and firm
  • Increases level of UV protection when used under sunscreen
    • Adding vitamin E and ferulic acid with vitamin C further increases UV protection
  • Helps to keep skin hydrated
  • Fades brown spots or hyperpigmentation

Ascorbic acid really is an amazing skincare ingredient. The trick is just getting the packaging/formulation right to keep it stable. In this case, since ascorbic acid is the only ingredient and it’s in powder form, the product’s stability is a non-issue. 🙂


While this Good Molecules Vitamin C Booster Powder is undoubtedly effective, it is also very simple. No formulation was required since it consists of only a single ingredient. For that reason, I think it is to be expected that it would be inexpensive. When purchasing a lot of skincare, especially more expensive products, I expect that a big part of the price tag is due to R&D and the company’s reputation. Since I assume there was no R&D involved in this product (ascorbic acid is a well-known ingredient that already had a lot of research backing it long before this product came along), and all of the other Good Molecules products are very affordable, I think it’s only right that Good Molecules priced this product at $8.00. 

This product really is a great value. The amount of product that comes in the little jar is 0.71 ounces, and that might not sound like much, but let me tell you: a little goes a very long way (make sure you use the spoon!). The shelf life is only 6 months but I think it will last even longer than that for me if I continue using it only twice a week. With some products, I heed the shelf life, but with this one I think it should be fine longer than that as long as it’s kept dry.

I had a bit of a bumpy start with Good Molecules Vitamin C Booster Powder, but now that I’ve nailed down the best time to use it and the best way to use it, I’m really enjoying it! This is a rare product that actually makes a visible difference in my skin overnight. I wake up to my skin looking bright, fresh, and healthy after applying this powder with my night time moisturizer.

I think this product would be perfect for those that want the skin benefits of vitamin C, but aren’t having very good luck with traditional vitamin C products. Those with very sensitive skin may need to avoid this product altogether since it has the potential to be irritating. If you’re a little sensitive and want to try it, just make sure you start out slowly (once a week and use less than a spoonful) to see how your skin reacts.

For those that want a daily dose of vitamin C on their skin, the Niacinamide Brightening Toner is another excellent product from Good Molecules. That toner contains 3-O-Ethyl Ascorbic Acid (a very stable form of vitamin C), as well as several other skin-loving ingredients.

What is your favorite vitamin C product? Have you ever tried using a vitamin C powder similar to this one? I’m curious to hear about your experiences! 🙂


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2 thoughts on “What to Know about Vitamin C in Skincare ft. Good Molecules Vitamin C Booster Powder

  1. Hi Miss Lauren, It took me awhile to get used to this kind of vitamin C product, being it in a powder form, I’m used to Vitamin C serums, I also found that it didn’t mix well with the Good Molecules serums and started to mix it with the moisturiser, but now I’ve switched my skincare routine up a bit at night and I’m incorporating Vitamin C with my prescription Tretinoin and Vitamin A serum and that appears to be working for me now, I use it every night with no irritation and I also use a Vitamin C in my morning skincare routine. I also use my led light therapy mask at night after I’ve applied all my nightly skincare products for 30 minutes every night, I’ve noticed a difference in my skin since using this routine for a couple of months now.
    Kindest Regards
    Janelle 😊

    • Hi Janelle! This is definitely a different kind of product that requires some trial and error. It sounds like you’ve figured out a skincare routine that’s very effective for you. That’s wonderful! 🙂


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