- BOOST C15 Super Booster, 15% Vitamin C Serum for Face, Face Serum with Vitamin E & Ferulic Acid for Discoloration & Glow, Fragrance-Free

Wonderful and has lightened up some dark spots

Definitely recommend! I've been using this product for maybe 2 years and it's done wonders for my skin. I had a different vitamin C serum before this and this one is by far my favorite. (After adding a gentle retinol into the mix it's even better.) The one thing I will say is that it's basically like water so I usually hold a hand up to my face and rub/dab it in as I go so it doesn't run all down my face. It doesn't bother me though since it actually makes it easier to apply all over the face with very few drops. I would say a bottle lasts me anywhere between 2-3 months. I see some reviews talk about issues with packaging and spills but I've personally never had an issue with any of that so, it might depend on location or how far the package is being sent. And for anyone concerned about the product being different colors when you order a new replacement, that's just how this product works! Visit Paula's Choice website or google about the product. There's actually a variation of different colors this product can be and still be safe to use. Vitamin C is finicky like that. Another warning is be careful what else you mix this with and how you layer it with other products. Looking at all the reviews I am curious how many novice skincare folks are buying this product not realizing that vitamin C is an acid. If you don't know what you're doing then you might end up seriously damaging your skin's acid mantle which can causing irritation, burning and/or breakouts. Most of what I'm seeing in the photos looks like that's what happened too so, proceed with caution if you aren't familiar with how to mix skincare products or have especially sensitive skin. And if you use physical exfoliants (which, really no one should be but that's a separate topic) then definitely do not apply this for at least 24 hours. (Again, it's an acid. The pH is 3.1–3.5 according to their website and most retinol's are around 5-6 pH levels.) ♡

Just received this item and have been using it for a week now. I’ve decided to invest more time and energy into my skin care routine since I am getting older. Within one week, I’ve noticed the difference in my skin softness and smoothness. Also, my dark spots are getting less pigmented. Having a routine helps to support the full effects of this serum. The effectiveness of this product, following a skin care routine, is improving how I look and feel. Using the serum enhances the products I use afterwards. Moisturizing adds to the effectiveness of my total skin care routine. The investment is worth having a brighter, clearer, and smooth complexion.

I used to sell R+R. And this product comes pretty close to brightening the skins appearance. I like how it feels really light on my face and makes me feel luminous.

I love other Paula's Choice products (I exclusively use PC AHA/BHA and retinol), so I was both surprised and disappointed to find this product consistently abysmal. I have now ordered this product three times (in the sample size each time, as Vitamin C in L-AA form degrades quickly following exposure to light/air)-- once directly from the PC website, and twice through Amazon. Each time, this product was already bright amber in color (including the time I ordered directly from the PC website), indicating late stages of oxidation. This also smells bad, as other reviewers have noted (kind of like hot dog water)-- some of that is just because vitamin C smells, but some of that is due to the fact that the product was spoiled. L-AA, of course, degrades quickly, and some oxidation is more or less inevitable unless you're formulating your own vitamin C products at home. However, this is theoretically stabilized by ferulic acid and tocopherol, so I don't understand why the product was at such late stages of oxidation each time I received it, and as a result I'm concerned they're not doing effective quality control or tracking sell-by dates. Moreover, it's fairly damning that this is packaged in an eyedropper bottle, especially since part of the Paula's Choice Gospel is packaging, and this packaging is dreadful. Bottom line: this product is either worthless or actively harmful. At this price point, that's ridiculous.

Great product!

I could not get this bottle opened, and I gave it to two other people to try to get the lid off. Neither of them could do it so I tapped it with a heavier object on the lid and the entire bottle broke and sliced my finger. I do not know if this was an exception, or if all of them are packaged this way with difficulty in opening. I lost almost all of the product on the floor and put the rest in a little container, but I will say I tried the product and the first day I saw a difference that was positive. It is expensive to have something like this happen, but I will continue using it to see if I like it as well as I think I might.

My most favorite Vitamin C, I have been using it for years and I love it! I have tried more than 5 different brands and I highly recommend this one.

So far the best Vitamin C I've used. Arrived on time. Comparable price to Sephora.

Llegó un poco chorreado, pero bueno, fuera de eso, me encanta el producto. Empresa la piel y da luminosidad. Lo compraría de nuevo

Die Schachtel des Serums kam völlig zerkratzt und kaputt an. Die Flasche des Serums selbst ist nicht versiegelt und der Verschluss ist schief auf die Flasche drauf gedreht. Das lässt mich stark vermuten dass da schonmal jemand dran war. Sorry, sowas schmiert man sich dann nicht ins Gesicht!!! Und das für den hohen Preis. Geht zurück!

Great product! It really brightens up the overall complexion. The formulation is really strong though so don't use it near the eyes to avoid irritating them.

Great product