Tested on animals:No
Paula's Choice RESIST C15 Super Booster is a water based 15% ascorbic acid treatment marketed for use in combination with your non-SPF moisturizers or serum. The good news is that this formula is well suited to treat a variety of skin concerns, and it's water-like texture makes it suitable for any skin type, including the acne prone.
We should note that if you have rosacea or very sensitive skin, we would recommend trying a sample first as high concentrations of ascorbic acid could be potentially sensitizing for you.
Packaged in a dropper with an internal air-restrictor—a step above the average dropper container—this blends well into your go-to serum or non-SPF moisturizer. You can absolutely mix this into any product that isn't a sunscreen, actually, so feel free to experiment with mixing the C15 Super Booster into your favorite leave-on AHA or BHA exfoliant, your toner or other treatments.
At a 15% concentration, ascorbic acid can make a significant improvement in the appearance of sun damage, uneven skin tone and strengthen the skin's barrier. Vitamin C can also help boost the free-radical protection ability of your sunscreen when worn underneath (Skin Research & Technology, 2008 and Experimental Dermatology, 2003 and The Journal of Pathology, 2007).
Also included in the RESIST C15 Super Booster is sodium hyaluronate, which is the salt form of hyaluronic acid and optimal for use in topical skincare products. Hyaluronic acid helps improve skin's moisture content, reduces inflammation, and provide antioxidant defense (Journal of Clinical and Aesthetic Dermatology, 2012 & Journal of Drugs in Dermatology, 2012).
You'll also find the antioxidant ferulic acid, vitamin E and the peptide acetyl octapeptide-3—with such a mix of anti-agers, this is a well-rounded treatment that is ideal for those who would like to "boost" the results of their routine.
The RESIST C15 Super Booster earns our highest rating for its potent, well-formulated combination of beneficial ingredients and that it is suitable for any skin type. We should note that Paula's Choice recommends this be used within three months, which is absolutely accurate. At such a high concentration of vitamin C, stability can become an issue if you keep it for longer than that period after opening.
- Light-as-water texture suitable for all skin types.
- Helps repair skin's barrier.
- Improves free radical defense of skin, and reduces inflammation.
- Can improve the appearance of post-breakout red marks and dark spots from sun damage.