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Our new & improved bestselling 15% vitamin C brightens skin, improves the appearance of fine lines & wrinkles and boosts glow in 15 minutes for immediate results – without irritation.
New gentle formula, immediate results
Vitamin C visibly brightens skin
Feather-light, liquid formula absorbs quickly
C15 Super Booster’s improved formula delivers high-potency vitamin C with minimised irritation. New technology targets dullness & uneven tone for a firmer, more radiant complexion with the addition of ergothioneine to boost efficacy for advanced results. Ferulic acid defends against discolouration and boosts 15% vitamin C’s stability. Diminishes visible signs of ageing for brighter, smoother skin with an exclusive blend of 15% stabilised vitamin C (l-ascorbic acid) at a pH range of 3.1–3.5, potent antioxidants ferulic acid, ergothioneine, vitamin E and skin-smoothing peptides. You’ll see younger-looking and more radiant skin with each use.
had brighter skin & no irritation.* *Based on twice daily usage in an independent clinical study with 30 subjects in 12 weeks.
Because skincare works best when it suits your skin type.
Wash your face with a gentle cleanser and wait 15-30 minutes. Select what you see and how you feel.
Vitamin C One of the most well-researched vitamins for skin, shown to improve the look of multiple signs of ageing, brighten uneven skin tone, as well as provide skin-restoring and soothing benefits.
Ferulic acid Fights discolouration and stabilises vitamin C.
ERGOTHIONEINE
Improves uneven tone & boosts vitamin C's efficacy.
How to use a serum
Apply once or twice daily after cleansing, toning and exfoliating. Dispense 2–3 drops and add to your favourite moisturiser or serum. May also be used alone. For daytime, follow with a broad-spectrum sunscreen rated SPF 30 or greater. May be applied around the under-eye area.
Despite the C15 Super Booster being one of our top-selling products globally, there were some improvements requested by customers like increased gentleness and formula stability, improved texture and packaging improvements. We listened to their feedback and reformulated the C15 Super Booster to address these concerns and make it even better. We believe the new and improved formula will be something both existing and new clients will love!
While the original formula was effective, our bestselling vitamin C booster is now even better at revitalising your complexion and elevating your skincare routine. The new formula combines the benefits of pure vitamin C with targeted peptides and ergothioneine, which provide anti-ageing benefits. These peptides help to soften the appearance of fine lines and wrinkles while improving the skin's underlying support for greater resilience. Overall, the new formula is more stable, gentler and performs even better than the original. Bonus – it smells better too!
No. The formula was designed to complement the ingredients in our serums and non-SPF moisturisers. However, we don’t recommend mixing it directly into your sunscreen because mixing any non-SPF skincare product with sunscreens can reduce their effectiveness against UV rays.
Yes, the skin-loving benefits of vitamin C plus key antioxidants in this booster support healthy skin, which in turn may eliminate some of the triggers that drive breakouts. These ingredients can also help fade post-breakout marks.
Yes, most people with sensitive skin can use vitamin C safely. The amount of vitamin C (15%) in C15 Super Booster is potent, but the formula is suitable for sensitive skin because of the additional skin-soothing ingredients and extra formulary steps taken to ensure its stability and gentleness. Vitamin C isn’t known to cause skin irritation, but if you notice dryness, redness or stinging, we recommend reducing application frequency, or mixing 2-3 drops into your other serums or non-SPF moisturiser. If you've experienced sensitisation to higher amounts of vitamin C, we recommend you consider our C5 Super Boost Moisturizer, which contains 5% vitamin C.
Yes. Although once or twice-daily application is recommended, you’ll absolutely see benefits from C15 Super Booster even if it's applied less often. However, results might take a bit longer to notice due to the less frequent application. As with any skincare product, you need to pay attention to how your skin responds and adjust usage (or products) accordingly.
The only ingredients you shouldn’t use with vitamin C are copper peptides. Copper peptides can oxidise pure vitamin C, making it less effective on the skin. When using vitamin C and copper peptides in your routine, we recommend using one in the morning and the other at night to ensure maximum effectiveness. Aside from this exception, you can typically use vitamin C along with other ingredients such as retinol, AHA, BHA, niacinamide and more. See our article to learn more about why vitamin C and niacinamide play well together.
The C15 Super Booster contains 15% pure ascorbic acid (vitamin C) and is a great option for anyone who wants a daily dose of vitamin C to help fortify skin and improve minor skin discolouration or dullness. It can be used alone or mixed into your favourite serum or non-SPF moisturiser. The 25% Vitamin C + Glutathione Clinical Serum contains two vitamin C esters: 23% tetrahexyldecyl ascorbate and 2% ascorbyl glucoside, and is best suited for those with advanced discolouration concerns, uneven skin tone and lack of firmness. Each product can be used on its own or in combination with one another (e.g., C15 during the day and 25% Vitamin C at night). Whether to use one or both will depend on your primary concerns and tolerance for these ingredients. We suggest experimenting to see what works best for your skin. As with all bio-active ingredients, start slowly and increase use as desired.
To protect the potency of the formula, we've opted for a UV-coated glass container (to shield from light) and an internal restrictor which drastically reduces airflow per use. In rigorous testing, these packaging safeguards proved effective at preserving the efficacy of the vitamin C and other key ingredients in this formula for a period of three months once opened.
The C15 Super Booster can range from a clear to pale peach and even amber tone. This variation is normal and doesn't affect its effectiveness. Vitamin C products like the C15 Super Booster tend to darken over time after opening due to exposure to air and light. This darkening doesn't mean it's spoiled, but it does indicate a decrease in potency. We recommend using your unopened C15 Super Booster within 18 months (shelf life) of purchase. Once opened, use it within three months for optimal effectiveness. If your C15 Super Booster turns dark orange or brown along with a noticeable texture change, it's a sign that the vitamin C has degraded significantly and it's time to replace it for full benefits. Tip: use a Sharpie-type marker to write the date of opening on the bottom of the bottle.
While Paula's Choice products are fragrance-free, each product may have a unique scent due to its ingredients. While our team worked to improve the scent of this formula, our new and improved C15 Super Booster may have a noticeable scent to some due to the combination of ingredients it contains. This scent dissipates quickly after application. The perception of smell can vary greatly between individuals, so what one person notices, another may not notice at all. Many customers find that they quickly get used to the unique scents of Paula's Choice products and that the benefits outweigh any potential drawbacks.
Although refrigerating many types of skincare products can hinder their stability and performance, research has shown that pure vitamin C (ascorbic acid) in water-based formulas remains stable and effective in cold temperatures as well as room temperature upwards of 25C. Although that’s good news, many of the other ingredients in this booster are not meant for routine, prolonged exposure to cold temperatures. While cold temperatures can be fine for ascorbic acid, they’re not recommended for this total formula.
Yes, all forms of vitamin C used in skincare, including ascorbic acid, which is in C15 Super Booster, are generally considered safe during pregnancy or while breastfeeding. However, if you’re uncertain about using any new skin care product or ingredient, check with your doctor.