C15 Super Booster's improved formula delivers high-potency vitamin C with minimized irritation. New technology targets dullness and uneven tone for a firmer, more radiant complexion with the addition of ergothioneine to boost efficacy for advanced results. Ferulic acid defends against discoloration and boosts 15% vitamin C’s stability.

Best Skincare 2022, Best Brightening Booster ; Beauty Insiders' Choice Award

Resist Daily Smoothing Treatment 5% AHA (Glycolic Acid) refines the surface of skin with exceptionally gentle and completely non-abrasive exfoliation. It also offers additional benefits, including hydration, soothing antioxidants, and a mix of fortifying skin-restoring ingredients.
This product has an optimal pH range of 3.5–3.9.

C15 Super Booster: Diminishes visible signs of aging for brighter, smoother skin with an exclusive blend of 15% stabilized 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.

Daily Smoothing Treatment 5% AHA: Reveals youthful radiant skin and helps reduce the appearance of fine lines and wrinkles. This innovative daily-use formula continually revitalizes skin’s texture, visibly evens skin tone, and helps promote visibly firmer-looking, smoother skin. A specially selected mix of antioxidants helps fight the impact of free-radical damage, while ceramides and peptides bind moisture for beautifully radiant skin.

C15 Super Booster: Dispense 2-3 drops into the palm of your hand and then apply to your face. Add a couple more drops if you will also be applying to your neck and chest. During the day, finish with a moisturizer with SPF 30 or greater. Can be applied under the eye area, avoiding the eye itself.

Daily Smoothing Treatment 5% AHA: Apply once or twice daily after cleansing and toning. Apply a dime-sized amount over the entire face, avoiding direct contact with eyes and lips. Do not rinse. For daytime, follow with a broad-spectrum sunscreen rated SPF 30 or greater.
When using your product for the first time, you may need to “prime” the dispenser. To prime, simply pump the dispenser slowly about 10-15 times. If the dispenser stops working at any time, simply repeat the "priming" step. Do not attempt to dismantle the package.

Sun Protection Advice When Using Any AHA Exfoliant: This product contains 5% glycolic acid, an ingredient that may increase your skin's sensitivity to the sun and the possibility of sunburn. Always apply a broad-spectrum sunscreen rated SPF 30 or greater every day. When outdoors, wear protective clothing whenever possible, seek shade, and avoid prolonged sun exposure.

Our products contain effective levels of ingredients guaranteed to be good for your skin. You can view the full ingredient list for each product in this set on its individual product page.